{"id":78579,"date":"2026-07-18T09:15:05","date_gmt":"2026-07-18T06:15:05","guid":{"rendered":"https:\/\/drivernew.com\/?p=78579"},"modified":"2026-07-18T09:15:05","modified_gmt":"2026-07-18T06:15:05","slug":"ij-scan-utility-lite-cannot-detect-canon-ts9540-ts9550-or-ts9550a-on-macos-errors-157-201-and-202","status":"publish","type":"post","link":"https:\/\/drivernew.com\/?p=78579","title":{"rendered":"IJ Scan Utility Lite Cannot Detect Canon TS9540, TS9550, or TS9550A on macOS: Errors 157, 201, and 202"},"content":{"rendered":"<p>Canon IJ Scan Utility Lite may stop detecting a Canon TS9500 Series scanner after a macOS update, a router restart, the Mac wakes from sleep, or the network connection changes.<\/p>\n<p>When you click <strong>Auto<\/strong>, <strong>Document<\/strong>, <strong>Photo<\/strong>, or <strong>Custom<\/strong>, a message appears stating that communication with the scanner cannot be established. Sometimes the application starts, but the scanner list remains empty or an old device is selected.<\/p>\n<p>This guide applies to the following models:<\/p>\n<ul>\n<li>Canon PIXMA TS9540;<\/li>\n<li>Canon PIXMA TS9540A;<\/li>\n<li>Canon PIXMA TS9541C;<\/li>\n<li>Canon PIXMA TS9541CA;<\/li>\n<li>Canon PIXMA TS9550;<\/li>\n<li>Canon PIXMA TS9550A;<\/li>\n<li>Canon PIXMA TS9551C;<\/li>\n<li>Canon PIXMA TS9551CA.<\/li>\n<\/ul>\n<p>In Canon applications and macOS, the device may appear under the common name:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Canon TS9500 series<\/pre>\n<p>The main steps apply to:<\/p>\n<ul>\n<li>macOS Tahoe 26;<\/li>\n<li>macOS Sequoia 15;<\/li>\n<li>macOS Sonoma 14;<\/li>\n<li>macOS Ventura 13;<\/li>\n<li>Mac computers with Apple silicon;<\/li>\n<li>Mac computers with Intel processors.<\/li>\n<\/ul>\n<div style=\"background-color: #fffbf0; border-left: 5px solid #ff9800; padding: 20px; margin: 25px 0; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.05);\">\n<p style=\"margin-top: 0;\"><strong>Check macOS system scanning first<\/strong><\/p>\n<p>If the Canon scanner works through Image Capture or the <strong>Open Scanner<\/strong> button, the device, network, and AirPrint system component are working.<\/p>\n<p style=\"margin-bottom: 0;\">In this case, do not remove the working printer queue. You need to correct IJ Scan Utility Lite, the selected scanner, or the application permissions.<\/p>\n<\/div>\n<h2>Exact Error 157 Message<\/h2>\n<p>The following message may appear in IJ Scan Utility Lite:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Cannot communicate with scanner for these reasons:\r\n- Scanner is turned off.\r\n- (If using Wired LAN connection) It is disconnected from Wired LAN.\r\n- (If using wireless LAN connection) Signal strength is poor due to obstructions.\r\n- Network connection is prohibited by security software.\r\n- Different scanner on the network is selected.\r\n\r\nCheck the above and try scanning again.\r\nIf you still cannot communicate, restart the computer.\r\n\r\nError 157<\/pre>\n<p>The main causes of Error 157 are:<\/p>\n<ul>\n<li>the printer is turned off;<\/li>\n<li>an error is displayed on the Canon screen;<\/li>\n<li>the printer lost its Wi-Fi connection;<\/li>\n<li>the Ethernet cable is disconnected;<\/li>\n<li>the Wi-Fi signal is too weak;<\/li>\n<li>the Mac and Canon printer are on different networks;<\/li>\n<li>a guest network is being used;<\/li>\n<li>a VPN is blocking the local connection;<\/li>\n<li>security software is blocking IJ Scan Utility Lite;<\/li>\n<li>another Canon device is selected in the application;<\/li>\n<li>the Bonjour service name has changed;<\/li>\n<li>Bonjour is disabled on the printer;<\/li>\n<li>another user or application is already using the scanner.<\/li>\n<\/ul>\n<h2>Exact Error 201 Message<\/h2>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">A required file is missing or corrupted, or settings are incorrect.\r\nTry the installation again.\r\n\r\nError 201<\/pre>\n<p>Error 201 means that one of the IJ Scan Utility Lite components or the system scanning driver is missing, damaged, or installed incorrectly.<\/p>\n<p>The problem may appear:<\/p>\n<ul>\n<li>after a major macOS update;<\/li>\n<li>after applications are transferred from an old Mac;<\/li>\n<li>after Canon applications are removed incompletely;<\/li>\n<li>after the system is restored from a backup;<\/li>\n<li>when an old installer is used;<\/li>\n<li>when the installer does not match the current macOS version;<\/li>\n<li>when the installation was interrupted;<\/li>\n<li>when antivirus software removed or blocked an application component.<\/li>\n<\/ul>\n<h2>Exact Error 202 Message<\/h2>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">An internal error has occurred.\r\n\r\nTake the following measures:\r\n\r\n* Check the scanner status.\r\n* Restart the scanner.\r\n* Restart the computer, then try again.\r\n* Reinstall the scanner driver.\r\n\r\nError 202<\/pre>\n<p>Error 202 indicates an internal failure in the application or scanning component.<\/p>\n<p>It may occur if:<\/p>\n<ul>\n<li>the Canon printer did not complete the previous job;<\/li>\n<li>the application became unresponsive after the Mac woke from sleep;<\/li>\n<li>the scanner is being used by another application;<\/li>\n<li>the network connection was interrupted during scanning;<\/li>\n<li>a Canon background process is not working correctly;<\/li>\n<li>the application is incompatible with the updated macOS version;<\/li>\n<li>the scanning component is damaged.<\/li>\n<\/ul>\n<h2>Check the Canon Printer Without the Mac First<\/h2>\n<p>Before changing any settings, make sure the scanning component of the multifunction printer is working.<\/p>\n<ol>\n<li>Turn on the Canon printer.<\/li>\n<li>Wait for the Home screen to appear.<\/li>\n<li>Check whether a support code is displayed.<\/li>\n<li>Place a document face down on the scanner glass.<\/li>\n<li>Load A4 plain paper.<\/li>\n<li>On the touchscreen, select <strong>Copy<\/strong>.<\/li>\n<li>Tap <strong>Black<\/strong>.<\/li>\n<\/ol>\n<p>If the copy prints:<\/p>\n<ul>\n<li>the scanning unit is working;<\/li>\n<li>the problem is related to the Mac, network, or application;<\/li>\n<li>proceed to checking system scanning.<\/li>\n<\/ul>\n<p>If copying is unavailable or a support code appears on the screen, resolve the hardware error first.<\/p>\n<h2>Check Scanning Without IJ Scan Utility Lite<\/h2>\n<h3>Through Printers &amp; Scanners<\/h3>\n<ol>\n<li>Open the <strong>Apple<\/strong> menu.<\/li>\n<li>Select <strong>System Settings<\/strong>.<\/li>\n<li>Open <strong>Printers &amp; Scanners<\/strong>.<\/li>\n<li>Select Canon TS9500 Series.<\/li>\n<li>Click <strong>Open Scanner<\/strong>.<\/li>\n<li>Place a document on the scanner glass.<\/li>\n<li>Select the destination folder.<\/li>\n<li>Click <strong>Scan<\/strong>.<\/li>\n<\/ol>\n<h3>Through Image Capture<\/h3>\n<ol>\n<li>Press <strong>Command + Space<\/strong>.<\/li>\n<li>Enter:\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Image Capture<\/pre>\n<\/li>\n<li>Open the application.<\/li>\n<li>Select Canon on the left side of the window.<\/li>\n<li>Perform a test scan.<\/li>\n<\/ol>\n<h3>How to Evaluate the Result<\/h3>\n<p>If system scanning works but IJ Scan Utility Lite displays an error:<\/p>\n<ul>\n<li>do not remove the printer from macOS;<\/li>\n<li>do not reset the printing system;<\/li>\n<li>check Local Network access;<\/li>\n<li>check the device selected in the application;<\/li>\n<li>restart or reinstall only the Canon application.<\/li>\n<\/ul>\n<p>If no application can detect the Canon device, check the network, Bonjour, and how the multifunction printer was added.<\/p>\n<h2>Method 1: Quit All Scanning Applications Completely<\/h2>\n<p>The scanner usually cannot be used by several applications at the same time.<\/p>\n<p>Quit:<\/p>\n<ul>\n<li>IJ Scan Utility Lite;<\/li>\n<li>Image Capture;<\/li>\n<li>Preview;<\/li>\n<li>Adobe Acrobat;<\/li>\n<li>OCR applications;<\/li>\n<li>document management applications;<\/li>\n<li>other scanning applications.<\/li>\n<\/ul>\n<p>To quit an application normally:<\/p>\n<ol>\n<li>switch to the application;<\/li>\n<li>press <strong>Command + Q<\/strong>;<\/li>\n<li>wait several seconds.<\/li>\n<\/ol>\n<h3>If the Application Is Unresponsive<\/h3>\n<ol>\n<li>Press:\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Option + Command + Esc<\/pre>\n<\/li>\n<li>Select IJ Scan Utility Lite.<\/li>\n<li>Click <strong>Force Quit<\/strong>.<\/li>\n<li>Quit the other scanning applications.<\/li>\n<li>Open only IJ Scan Utility Lite.<\/li>\n<\/ol>\n<p>Unsaved data in a force-quit application may be lost.<\/p>\n<h2>Method 2: Restart the Canon Printer and Mac<\/h2>\n<p>For Errors 157 and 202, Canon recommends checking the scanner status and restarting the devices.<\/p>\n<ol>\n<li>Quit IJ Scan Utility Lite.<\/li>\n<li>Turn off the printer using the power button.<\/li>\n<li>Wait until the power lamp turns off.<\/li>\n<li>Restart the Mac.<\/li>\n<li>Turn on the Canon printer.<\/li>\n<li>Wait for the Home screen to appear.<\/li>\n<li>Wait another minute.<\/li>\n<li>Start IJ Scan Utility Lite.<\/li>\n<li>Refresh the scanner list.<\/li>\n<li>Try scanning again.<\/li>\n<\/ol>\n<p>If a network connection is being used and the error remains, restart the router as well.<\/p>\n<h2>Method 3: Restart the Local Network<\/h2>\n<ol>\n<li>Quit all scanning applications.<\/li>\n<li>Turn off the Canon printer.<\/li>\n<li>Shut down the Mac.<\/li>\n<li>Disconnect the router from the power supply.<\/li>\n<li>Wait approximately one minute.<\/li>\n<li>Reconnect the router to the power supply.<\/li>\n<li>Wait until Wi-Fi and Internet access are fully restored.<\/li>\n<li>Turn on the Canon printer.<\/li>\n<li>Wait for the active network icon to appear.<\/li>\n<li>Turn on the Mac.<\/li>\n<li>Wait one or two minutes.<\/li>\n<li>Start IJ Scan Utility Lite.<\/li>\n<\/ol>\n<p>After startup, the Canon printer may need some time to register its Bonjour service again.<\/p>\n<h2>Method 4: Make Sure Both Devices Are on the Same Wi-Fi Network<\/h2>\n<h3>On the Mac<\/h3>\n<ol>\n<li>Open <strong>System Settings<\/strong>.<\/li>\n<li>Select <strong>Wi-Fi<\/strong>.<\/li>\n<li>Write down the name of the active network.<\/li>\n<\/ol>\n<h3>On the Printer<\/h3>\n<ol>\n<li>Tap the network icon on the touchscreen.<\/li>\n<li>Select <strong>Wi-Fi<\/strong>.<\/li>\n<li>Open the current connection information.<\/li>\n<li>Check the SSID network name.<\/li>\n<\/ol>\n<p>The Mac and Canon printer must be on the same local network.<\/p>\n<h3>Do Not Use a Guest Network<\/h3>\n<p>Do not connect the devices to a network whose name contains:<\/p>\n<ul>\n<li>Guest;<\/li>\n<li>Guest Network;<\/li>\n<li>Visitor;<\/li>\n<li>Public;<\/li>\n<li>Hotspot.<\/li>\n<\/ul>\n<p>A guest network may provide Internet access but block communication between the Mac and multifunction printer.<\/p>\n<h2>Method 5: Temporarily Disable the VPN<\/h2>\n<ol>\n<li>Quit IJ Scan Utility Lite.<\/li>\n<li>Disconnect the VPN application you are using.<\/li>\n<li>Open <strong>System Settings \u2192 VPN<\/strong> if that section is displayed.<\/li>\n<li>Disconnect the active connection.<\/li>\n<li>Wait several seconds.<\/li>\n<li>Start IJ Scan Utility Lite again.<\/li>\n<li>Refresh the scanner list.<\/li>\n<\/ol>\n<p>If the Canon device appears, find a setting in the VPN application that allows access to local devices.<\/p>\n<p>It may be called:<\/p>\n<ul>\n<li>Allow LAN Traffic;<\/li>\n<li>Local Network Access;<\/li>\n<li>Bypass VPN for Local Devices;<\/li>\n<li>Allow Local Network.<\/li>\n<\/ul>\n<h2>Method 6: Allow Local Network Access<\/h2>\n<p>This check is required in macOS Sequoia 15, macOS Tahoe 26, and later versions.<\/p>\n<p>Without permission, IJ Scan Utility Lite may:<\/p>\n<ul>\n<li>fail to detect the Canon device;<\/li>\n<li>display Error 157;<\/li>\n<li>display an empty scanner list;<\/li>\n<li>fail to start network scanning;<\/li>\n<li>fail to display the Mac on the multifunction printer\u2019s operation panel;<\/li>\n<li>work over USB but not over Wi-Fi.<\/li>\n<\/ul>\n<h3>Enable Permission<\/h3>\n<ol>\n<li>Open the <strong>Apple<\/strong> menu.<\/li>\n<li>Select <strong>System Settings<\/strong>.<\/li>\n<li>Open <strong>Privacy &amp; Security<\/strong>.<\/li>\n<li>Select <strong>Local Network<\/strong>.<\/li>\n<li>Find:\n<ul>\n<li><strong>Canon IJ Scan Utility Lite<\/strong>;<\/li>\n<li><strong>CIJSULAgent<\/strong>.<\/li>\n<\/ul>\n<\/li>\n<li>Turn on the switches next to both components.<\/li>\n<li>Allow access for any other Canon network applications you use.<\/li>\n<li>Close System Settings.<\/li>\n<li>Quit IJ Scan Utility Lite completely.<\/li>\n<li>Open it again.<\/li>\n<\/ol>\n<div style=\"background-color: #fffbf0; border-left: 5px solid #ff9800; padding: 20px; margin: 25px 0; border-radius: 4px; box-shadow: 0 1px 3px rgba(0,0,0,0.05);\">\n<p style=\"margin-top: 0;\"><strong>Allow access for the background component<\/strong><\/p>\n<p>CIJSULAgent helps the Canon application detect and communicate with the device.<\/p>\n<p style=\"margin-bottom: 0;\">If access is allowed only for the main application, network scanning may still not work.<\/p>\n<\/div>\n<h3>If the Application Is Not Listed<\/h3>\n<ol>\n<li>Start IJ Scan Utility Lite.<\/li>\n<li>Try refreshing the scanner list.<\/li>\n<li>When the macOS prompt appears, click <strong>Allow<\/strong>.<\/li>\n<\/ol>\n<p>If the prompt does not appear:<\/p>\n<ol>\n<li>quit the application;<\/li>\n<li>restart the Mac;<\/li>\n<li>start IJ Scan Utility Lite again;<\/li>\n<li>refresh the list again.<\/li>\n<\/ol>\n<h2>Method 7: Select the Correct Canon Device in the Application<\/h2>\n<p>Error 157 often appears when IJ Scan Utility Lite has saved an old or different device.<\/p>\n<h3>Open the Application<\/h3>\n<ol>\n<li>Open Finder.<\/li>\n<li>From the menu bar, select <strong>Go \u2192 Applications<\/strong>.<\/li>\n<li>Open the <strong>Canon Utilities<\/strong> folder.<\/li>\n<li>Open the <strong>IJ Scan Utility<\/strong> folder.<\/li>\n<li>Start <strong>Canon IJ Scan Utility Lite<\/strong>.<\/li>\n<\/ol>\n<h3>Check the Scanner Field<\/h3>\n<p>At the top of the main window is the following field:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Scanner<\/pre>\n<p>The application displays the Bonjour service name of the selected device.<\/p>\n<ol>\n<li>Open the Scanner list.<\/li>\n<li>Select the actual Canon TS9500 Series device.<\/li>\n<li>Do not select an old printer, a Wireless Direct entry, or another Canon multifunction printer.<\/li>\n<li>Click the button to refresh the list.<\/li>\n<li>Wait several seconds.<\/li>\n<\/ol>\n<h3>If USB Is Being Used<\/h3>\n<p>With a USB connection, the following may appear after the name:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">USB<\/pre>\n<p>Select the USB entry if the Canon printer is connected directly to the Mac with a cable.<\/p>\n<h2>Method 8: Refresh the Scanner List<\/h2>\n<p>The refresh button is located next to the Scanner field.<\/p>\n<ol>\n<li>Make sure the Canon printer is turned on.<\/li>\n<li>Check the network icon on the printer.<\/li>\n<li>Click <strong>Refresh<\/strong> in IJ Scan Utility Lite.<\/li>\n<li>Wait for the search to finish.<\/li>\n<li>Open the Scanner list again.<\/li>\n<li>Select the correct Bonjour name.<\/li>\n<\/ol>\n<p>Refreshing is especially important if:<\/p>\n<ul>\n<li>the router was replaced;<\/li>\n<li>the Bonjour name changed;<\/li>\n<li>the printer was switched from Wi-Fi to Ethernet;<\/li>\n<li>Wireless Direct was previously used;<\/li>\n<li>the Canon printer received a new network address;<\/li>\n<li>several identical models are installed on the network.<\/li>\n<\/ul>\n<h2>Method 9: Check Bonjour on the Canon Printer<\/h2>\n<p>Canon states that IJ Scan Utility Lite cannot be used over a network if Bonjour is disabled.<\/p>\n<ol>\n<li>On the touchscreen, select <strong>Setup<\/strong>.<\/li>\n<li>Open <strong>Device settings<\/strong>.<\/li>\n<li>Select <strong>LAN settings<\/strong>.<\/li>\n<li>Select the connection being used.<\/li>\n<li>Open the advanced settings.<\/li>\n<li>Select <strong>Bonjour settings<\/strong>.<\/li>\n<li>Set it to <strong>Enable<\/strong>.<\/li>\n<\/ol>\n<p>Also check the Bonjour service name.<\/p>\n<p>After changing the setting:<\/p>\n<ol>\n<li>turn off the Canon printer;<\/li>\n<li>turn it on again;<\/li>\n<li>wait one or two minutes;<\/li>\n<li>restart IJ Scan Utility Lite;<\/li>\n<li>refresh the Scanner list.<\/li>\n<\/ol>\n<h2>Method 10: Check Access to the Canon Printer Through Safari<\/h2>\n<ol>\n<li>Open the network information on the printer\u2019s screen.<\/li>\n<li>Write down the IPv4 address.<\/li>\n<\/ol>\n<p>Example address:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">192.168.1.125<\/pre>\n<p>Use your Canon printer\u2019s actual address, not the value from this example.<\/p>\n<ol start=\"3\">\n<li>Open Safari.<\/li>\n<li>Enter the printer\u2019s IP address.<\/li>\n<li>Press Enter.<\/li>\n<\/ol>\n<p>If the Remote UI page opens:<\/p>\n<ul>\n<li>the Mac can detect the Canon printer on the network;<\/li>\n<li>check Bonjour, Local Network permission, and the selected scanner;<\/li>\n<li>the network itself is generally working.<\/li>\n<\/ul>\n<p>If the page does not open:<\/p>\n<ul>\n<li>check the SSID;<\/li>\n<li>disable the VPN;<\/li>\n<li>restart the router;<\/li>\n<li>check whether a guest network is being used;<\/li>\n<li>check the signal strength;<\/li>\n<li>check the firewall settings.<\/li>\n<\/ul>\n<h2>Method 11: Check Security Software<\/h2>\n<p>The official Error 157 message states that the network connection may be blocked by security software.<\/p>\n<p>Check:<\/p>\n<ul>\n<li>third-party antivirus software;<\/li>\n<li>a network filter;<\/li>\n<li>a corporate VPN;<\/li>\n<li>a network connection control application;<\/li>\n<li>a security DNS filter;<\/li>\n<li>a corporate firewall.<\/li>\n<\/ul>\n<p>Allow local network access for:<\/p>\n<ul>\n<li>Canon IJ Scan Utility Lite;<\/li>\n<li>CIJSULAgent;<\/li>\n<li>Canon components;<\/li>\n<li>Bonjour services.<\/li>\n<\/ul>\n<p>Do not disable security permanently. For testing, you can temporarily stop only the third-party network filter and then enable it again.<\/p>\n<h2>Method 12: Check the Built-In macOS Firewall<\/h2>\n<ol>\n<li>Open <strong>System Settings<\/strong>.<\/li>\n<li>Select <strong>Network<\/strong>.<\/li>\n<li>Open <strong>Firewall<\/strong>.<\/li>\n<li>Check the advanced settings.<\/li>\n<\/ol>\n<p>If all incoming connections are being blocked, temporarily disable only this option for testing.<\/p>\n<p>Restore the secure settings after troubleshooting.<\/p>\n<h2>Method 13: Check a Direct USB Connection<\/h2>\n<p>A USB test helps distinguish a network problem from a damaged application.<\/p>\n<ol>\n<li>Turn on the Canon printer.<\/li>\n<li>Connect a USB Type-B cable to the multifunction printer.<\/li>\n<li>Connect the other end directly to the Mac.<\/li>\n<li>Do not use a hub or docking station for the initial test.<\/li>\n<li>Wait several minutes.<\/li>\n<li>Start IJ Scan Utility Lite.<\/li>\n<li>Open the Scanner list.<\/li>\n<li>Select the entry marked as USB.<\/li>\n<li>Click <strong>Document<\/strong>.<\/li>\n<\/ol>\n<p>If USB scanning works:<\/p>\n<ul>\n<li>IJ Scan Utility Lite is installed;<\/li>\n<li>the Canon scanning component is working;<\/li>\n<li>the error is related to Wi-Fi, Bonjour, the router, or Local Network permission.<\/li>\n<\/ul>\n<h2>If the USB Scanner Is Not Detected<\/h2>\n<ol>\n<li>Disconnect the cable.<\/li>\n<li>Try another USB port.<\/li>\n<li>Try another working cable.<\/li>\n<li>If USB-C is being used, replace the adapter.<\/li>\n<li>Do not connect the Canon printer through a monitor.<\/li>\n<li>Restart the Mac.<\/li>\n<\/ol>\n<p>Check whether the device is physically detected:<\/p>\n<ol>\n<li>Hold down the <strong>Option<\/strong> key.<\/li>\n<li>Open the <strong>Apple<\/strong> menu.<\/li>\n<li>Select <strong>System Information<\/strong>.<\/li>\n<li>Open the <strong>USB<\/strong> section.<\/li>\n<li>Find Canon TS9500 Series.<\/li>\n<\/ol>\n<p>If Canon is missing from the USB section, the problem may be related to the cable, adapter, Mac port, or multifunction printer connector.<\/p>\n<h2>Resolving Error 157<\/h2>\n<p>Perform the following steps in the specified order:<\/p>\n<ol>\n<li>Make sure the Canon printer is turned on.<\/li>\n<li>Resolve any support code displayed on the screen.<\/li>\n<li>Check the Wi-Fi or Ethernet connection.<\/li>\n<li>Connect the Mac and Canon printer to the same network.<\/li>\n<li>Do not use a guest network.<\/li>\n<li>Disable the VPN.<\/li>\n<li>Quit other scanning applications.<\/li>\n<li>Allow Local Network access for IJ Scan Utility Lite.<\/li>\n<li>Allow Local Network access for CIJSULAgent.<\/li>\n<li>Check Bonjour on the printer.<\/li>\n<li>Refresh the Scanner list.<\/li>\n<li>Select the correct Bonjour name.<\/li>\n<li>Restart the Canon printer and Mac.<\/li>\n<li>Check scanning over USB.<\/li>\n<\/ol>\n<h2>Resolving Error 201<\/h2>\n<p>For Error 201, the application and scanning components must be reinstalled.<\/p>\n<h3>Perform a Basic Check First<\/h3>\n<ol>\n<li>Quit IJ Scan Utility Lite.<\/li>\n<li>Restart the Mac.<\/li>\n<li>Check Image Capture.<\/li>\n<li>Check the available disk space.<\/li>\n<\/ol>\n<p>If system scanning works, the fault is limited to the Canon application.<\/p>\n<h3>Download the Current Application<\/h3>\n<ol>\n<li>Open the official support page for your Canon model.<\/li>\n<li>Select the installed macOS version.<\/li>\n<li>Find IJ Scan Utility Lite.<\/li>\n<li>If Canon provides a separate ICA driver or scanning package, check its compatibility with your version of macOS.<\/li>\n<li>Download only current files.<\/li>\n<\/ol>\n<p>Do not use:<\/p>\n<ul>\n<li>the supplied disc;<\/li>\n<li>an old saved copy of the installer;<\/li>\n<li>a package intended for another model;<\/li>\n<li>a Windows application;<\/li>\n<li>a file from a third-party website.<\/li>\n<\/ul>\n<h3>Reinstall the Application<\/h3>\n<ol>\n<li>Quit all scanning applications.<\/li>\n<li>Open the downloaded Canon file.<\/li>\n<li>Start the installation.<\/li>\n<li>Follow the on-screen instructions.<\/li>\n<li>Enter the administrator password if requested.<\/li>\n<li>Allow the application to access the local network.<\/li>\n<li>Restart the Mac after installation.<\/li>\n<li>Start IJ Scan Utility Lite.<\/li>\n<li>Select Canon in the Scanner field.<\/li>\n<li>Perform a test scan.<\/li>\n<\/ol>\n<h2>Resolving Error 202<\/h2>\n<ol>\n<li>Check the Canon printer\u2019s status.<\/li>\n<li>Quit other scanning applications.<\/li>\n<li>Turn off the multifunction printer.<\/li>\n<li>Restart the Mac.<\/li>\n<li>Turn on the Canon printer.<\/li>\n<li>Wait for startup to finish.<\/li>\n<li>Try scanning again.<\/li>\n<\/ol>\n<p>If Error 202 remains:<\/p>\n<ol>\n<li>check system scanning;<\/li>\n<li>check the USB connection;<\/li>\n<li>reinstall the current version of IJ Scan Utility Lite;<\/li>\n<li>install the recommended Canon scanning component if it is available for your version of macOS.<\/li>\n<\/ol>\n<h2>Error After the Mac Wakes from Sleep<\/h2>\n<p>After sleep, the application may retain an inactive network connection.<\/p>\n<ol>\n<li>Wake the Canon printer\u2019s screen.<\/li>\n<li>Check the network icon.<\/li>\n<li>Wait one minute.<\/li>\n<li>Quit IJ Scan Utility Lite by pressing <strong>Command + Q<\/strong>.<\/li>\n<li>Open the application again.<\/li>\n<li>Click <strong>Refresh<\/strong>.<\/li>\n<li>Select the Canon printer again.<\/li>\n<\/ol>\n<p>If the scanner does not appear:<\/p>\n<ol>\n<li>turn Wi-Fi off and on again on the Mac;<\/li>\n<li>disable the VPN;<\/li>\n<li>restart the Canon printer;<\/li>\n<li>restart the Mac;<\/li>\n<li>check the IP address through Safari.<\/li>\n<\/ol>\n<h2>Error After Replacing the Router<\/h2>\n<p>After the router is replaced, the following may change:<\/p>\n<ul>\n<li>the network name;<\/li>\n<li>the Wi-Fi password;<\/li>\n<li>the Canon printer\u2019s IP address;<\/li>\n<li>the Bonjour name or registration;<\/li>\n<li>the network subnet;<\/li>\n<li>device isolation settings.<\/li>\n<\/ul>\n<ol>\n<li>Connect the Canon printer to the new network.<\/li>\n<li>Make sure the Mac is using the same router.<\/li>\n<li>Restart the Mac.<\/li>\n<li>Start IJ Scan Utility Lite.<\/li>\n<li>Click <strong>Refresh<\/strong>.<\/li>\n<li>Select the new Canon entry.<\/li>\n<\/ol>\n<p>If the device does not appear, add the Canon printer to macOS again as:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Bonjour Multifunction \u2192 Secure AirPrint<\/pre>\n<h2>Error When Switching from USB to Wi-Fi<\/h2>\n<p>IJ Scan Utility Lite may continue using the old USB entry.<\/p>\n<ol>\n<li>Connect the Canon printer to Wi-Fi.<\/li>\n<li>Disconnect the USB cable.<\/li>\n<li>Quit IJ Scan Utility Lite.<\/li>\n<li>Restart the application.<\/li>\n<li>Click <strong>Refresh<\/strong>.<\/li>\n<li>In the Scanner field, select the Canon Bonjour name without the USB label.<\/li>\n<\/ol>\n<h2>Error When Switching from Wi-Fi to Ethernet<\/h2>\n<ol>\n<li>Connect the Ethernet cable to the router.<\/li>\n<li>Enable the wired LAN on the Canon printer.<\/li>\n<li>Wait for the printer to receive an IP address.<\/li>\n<li>Restart IJ Scan Utility Lite.<\/li>\n<li>Refresh the Scanner list.<\/li>\n<li>Select the current Canon entry.<\/li>\n<\/ol>\n<p>The Mac can continue using Wi-Fi if it is connected to the same router.<\/p>\n<h2>Other IJ Scan Utility Lite Error Codes<\/h2>\n<h3>Error 152: Not Enough Memory<\/h3>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">There is not enough memory.\r\nExit other applications to increase available memory.\r\n\r\nError 152<\/pre>\n<p>Quit other applications and try scanning again.<\/p>\n<h3>Error 153: Image Is Too Large<\/h3>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">The image you attempted to scan is in a size that cannot be opened in the specified application.\r\nChange the settings so that the image size is reduced.\r\n\r\nError 153<\/pre>\n<p>Reduce:<\/p>\n<ul>\n<li>the resolution;<\/li>\n<li>the scanning area size;<\/li>\n<li>the output format;<\/li>\n<li>the number of pages scanned at one time.<\/li>\n<\/ul>\n<h3>Error 231: Insufficient Disk Space<\/h3>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">Cannot complete the scan.\r\nThe disk space is insufficient.\r\n\r\nError 231<\/pre>\n<p>Delete unnecessary files or select another drive.<\/p>\n<h3>Error 232: Disk Is Write-Protected<\/h3>\n<p>Select a writable folder or storage device.<\/p>\n<h3>Error 234: Function Is Not Supported<\/h3>\n<p>The selected scanning mode is unavailable for the device or current source.<\/p>\n<p>Try:<\/p>\n<ul>\n<li>scanning from the scanner glass instead of the ADF;<\/li>\n<li>using <strong>Document<\/strong> mode instead of an unsupported mode;<\/li>\n<li>selecting another format or setting.<\/li>\n<\/ul>\n<h3>Errors 242, 243, and 244: No Access to the Folder<\/h3>\n<p>Check the permissions for the folder specified in the save field.<\/p>\n<p>For testing, select a standard local folder:<\/p>\n<ul>\n<li>Pictures;<\/li>\n<li>Documents;<\/li>\n<li>Desktop.<\/li>\n<\/ul>\n<p>Do not use the following for the initial test:<\/p>\n<ul>\n<li>a disconnected external drive;<\/li>\n<li>an unavailable network folder;<\/li>\n<li>a read-only folder;<\/li>\n<li>remote cloud storage without a connection.<\/li>\n<\/ul>\n<h3>Error 245: Text Was Not Recognized<\/h3>\n<p>Check:<\/p>\n<ul>\n<li>whether the OCR language matches the document language;<\/li>\n<li>whether the page contains readable text;<\/li>\n<li>whether the scan quality is high enough;<\/li>\n<li>whether the text is handwritten or decorative.<\/li>\n<\/ul>\n<h2>If IJ Scan Utility Lite Does Not Start<\/h2>\n<ol>\n<li>Restart the Mac.<\/li>\n<li>Open Finder.<\/li>\n<li>Go to <strong>Applications \u2192 Canon Utilities \u2192 IJ Scan Utility<\/strong>.<\/li>\n<li>Start the application directly from the folder.<\/li>\n<\/ol>\n<p>If the application closes immediately or becomes unresponsive:<\/p>\n<ul>\n<li>check for macOS updates;<\/li>\n<li>download the current version of the Canon application;<\/li>\n<li>do not use an old file transferred from another Mac;<\/li>\n<li>reinstall the application.<\/li>\n<\/ul>\n<h2>If macOS Blocks the Canon Installer<\/h2>\n<p>The following message may appear:<\/p>\n<pre style=\"background: #f4f4f4; border: 1px solid #ddd; padding: 12px; white-space: pre-wrap; overflow-x: auto;\">\u201cApplication\u201d can\u2019t be opened because Apple cannot check it for malicious software.<\/pre>\n<p>Do not disable macOS security completely.<\/p>\n<ol>\n<li>Close the installer.<\/li>\n<li>Make sure the file was downloaded from the official Canon website.<\/li>\n<li>Delete the old copy.<\/li>\n<li>Select the actual macOS version on the website.<\/li>\n<li>Download the current installer.<\/li>\n<\/ol>\n<p>If no official compatible package is available, use AirPrint scanning through Image Capture.<\/p>\n<h2>If the Application Works but Does Not Save the File<\/h2>\n<ol>\n<li>Open <strong>Settings<\/strong> in IJ Scan Utility Lite.<\/li>\n<li>Select the scanning mode you use.<\/li>\n<li>Check the <strong>Save in<\/strong> field.<\/li>\n<li>Select a local folder.<\/li>\n<li>Check the available disk space.<\/li>\n<li>Try scanning again.<\/li>\n<\/ol>\n<p>For the initial test, save the file in the Pictures folder.<\/p>\n<h2>Do You Need to Reset the Printing System?<\/h2>\n<p>A full printing system reset is usually unnecessary if:<\/p>\n<ul>\n<li>documents print successfully;<\/li>\n<li>Image Capture detects the Canon device;<\/li>\n<li>only IJ Scan Utility Lite is not working;<\/li>\n<li>the error is related to Local Network permission;<\/li>\n<li>the wrong scanner is selected.<\/li>\n<\/ul>\n<p>Consider a reset only when both printing and system scanning are unavailable and removing and adding the device normally did not help.<\/p>\n<h2>When the Problem Is Not Related to IJ Scan Utility Lite<\/h2>\n<p>The application will not resolve the fault if:<\/p>\n<ul>\n<li>the Canon printer cannot make copies;<\/li>\n<li>the scanning unit does not move;<\/li>\n<li>a hardware support code is displayed;<\/li>\n<li>the ADF jams documents;<\/li>\n<li>the multifunction printer does not turn on;<\/li>\n<li>the device cannot connect to any network;<\/li>\n<li>USB is not detected on several computers;<\/li>\n<li>liquid entered the device.<\/li>\n<\/ul>\n<h2>When a Network Administrator Is Required<\/h2>\n<p>Contact the administrator if:<\/p>\n<ul>\n<li>the Mac and Canon printer are in different VLANs;<\/li>\n<li>Bonjour is blocked on the network;<\/li>\n<li>multicast traffic is prohibited;<\/li>\n<li>a corporate VPN is being used;<\/li>\n<li>a firewall is installed between the devices;<\/li>\n<li>the printer is available only through a print server;<\/li>\n<li>the network settings cannot be changed.<\/li>\n<\/ul>\n<h2>When a Service Center Is Required<\/h2>\n<p>Contact a service center if:<\/p>\n<ul>\n<li>copying without the Mac does not work;<\/li>\n<li>the scanning unit does not move;<\/li>\n<li>a hardware support code appears;<\/li>\n<li>USB scanning does not work on several computers;<\/li>\n<li>scanning is interrupted by cracking noises;<\/li>\n<li>the device was damaged after being dropped;<\/li>\n<li>there is a smell of overheating;<\/li>\n<li>liquid entered the device.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Canon IJ Scan Utility Lite may stop detecting a Canon TS9500 Series scanner after a macOS update, a router restart, the Mac wakes from sleep, or the network connection changes. When you click Auto, Document, Photo, or Custom, a message&hellip;<\/p>\n<p class=\"more-link-p\"><a class=\"more-link\" href=\"https:\/\/drivernew.com\/?p=78579\">Read more &rarr;<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[27],"tags":[],"class_list":["post-78579","post","type-post","status-publish","format-standard","hentry","category-canon"],"modified_by":"DriverNew","_links":{"self":[{"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/posts\/78579","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/drivernew.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=78579"}],"version-history":[{"count":1,"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/posts\/78579\/revisions"}],"predecessor-version":[{"id":78580,"href":"https:\/\/drivernew.com\/index.php?rest_route=\/wp\/v2\/posts\/78579\/revisions\/78580"}],"wp:attachment":[{"href":"https:\/\/drivernew.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=78579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/drivernew.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=78579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/drivernew.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=78579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}