Grand Cherokee 2WD V8-318 5.2L VIN Y MFI (1994)
Transfer Case Switch Chart
The VIC module will perform certain self-tests without the use of special tools. To start the test mode, press the SELECT and SET switches
simultaneously while turning the key to ON. The program will stay in diagnostics mode until all the tests pass or the ignition is turned OFF.
When the diagnostic routine begins the module will perform the following:
MICROCOMPUTER RAM/ROM/TIMER TEST - Failure in any of these tests causes the message MODULE FAILURE to be displayed until the
ignition turns OFF.
DISPLAY TEST - Activate all display segments and beep 6 times. Pressing SET or SELECT will stop the beeps if they are going and the program will
advance to monitor the inputs.
If a failure is detected, a corresponding error message will be displayed. The input will be monitored until SET or SELECT is pressed, which will
advance diagnostics to the next step.
If the error is corrected while the error message is on the display, the word NORMAL will appear in the new message. Pressing SET or SELECT will
advance diagnostics to the next test.
OIL/COOLANT/WASHER/REAR LAMP/FOUR WHEEL DRIVE - These inputs are monitored. Refer to Diagnostic Messages.
If the tests are successful, the message MODULE VERSION XX will be displayed for 5 seconds. XX represents the module software revision level.
Pressmg the SELECT switch causes the diagnostics to continue to CLOCK DISPLAY SELECT.
If part of the module will not light or is not operating properly, use the schematic and wiring diagrams to check for continuity to the appropriate device.
If there is continuity and the sending device is operating properly, replace the VIC.