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Home >> Jeep >> 1996 >> Grand Cherokee Limited, 5.2 Y >> Repair and Diagnosis >> External Pages >> Different car >> Section 3 (Engine Controls - Tests W/Codes - 2.5L Flex Fuel) >> Self-Diagnostic System >> Entering On-Board Diagnostics >> CHECK ENGINE Light Diagnostic Mode

CHECK ENGINE Light Diagnostic Mode

WARNING: This page is about a different car, the 1994 Plymouth Acclaim and 1994 Dodge Spirit. However, it is still accessible from the selected car via links, so may be relevant.
  1. Start engine (if possible). Move transmission shift lever through all positions, ending in Park. Turn A/C switch on and then off (if equipped).
  2. Turn engine off. Without starting engine again, turn ignition on, off, on, off and on within 5 seconds. Record 2-digit trouble codes as displayed by flashing malfunction indicator (CHECK ENGINE) light.
  3. For example, trouble code 23 is displayed as flash, flash, 4-second pause, flash, flash, flash. After a slightly longer pause, other codes stored are displayed in numerical order.
  4. When CHECK ENGINE light begins to flash trouble codes, it cannot be stopped. Start over if count is lost. Code 55 indicates end of trouble code display.
  5. Refer to TROUBLE CODES  to translate trouble code number to a DRB trouble code message. Once trouble area is identified, refer to TEST TC-1A  in this article. Use DRB trouble codes to find appropriate test.
  6. As an example, a 3.0L engine starts and runs but has a driveability problem. Malfunction indicator (CHECK ENGINE) light indicates a Code 14. Refer to TROUBLE CODES  to translate trouble code number to a DRB trouble code message.
  7. When DRB trouble code message is obtained, refer to appropriate test number in this article. To clear trouble codes, see CLEARING TROUBLE CODES  .
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