Grand Cherokee 2WD L6-4.0L VIN S (1997)
Malfunction Indicator Lamp: Description and Operation
Using the MIL to Obtain Diagnostic Trouble Codes
TO OBTAIN DIAGNOSTIC TROUBLE CODES (DTCs)
1. Cycle the ignition key On - Off - On - Off - On within 5 seconds.
2. Count the number of times the MIL (check engine lamp) on the instrument panel flashes on and off. The number of flashes represents the trouble
code. There is a slight pause between the flashes representing the first and second digits of the code. Longer pauses separate individual two digit
trouble codes.
An example of a flashed DTC is as follows:
3. Lamp flashes 4 times, pauses, and then flashes 6 more times. This indicates a DTC number 46.
4. Lamp flashes 5 times, pauses, and flashes 5 more times. This indicates a DTC number 55. A DTC number 55 will always be the last code to be
displayed. This indicates the end of all stored codes.
5. To erase DTC's, use the Erase Trouble Code data screen on the DRB scan tool.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Procedures.
See: Powertrain Management/Computers and Control Systems/Testing and Inspection
