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Home >> Dodge and Ram >> 1991 >> Dakota S >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes - 2.5L >> Self-Diagnostic System >> Retrieving Fault Codes >> Check Engine Light Method

Check Engine Light Method

  1. Start engine (if possible). Move transmission shift lever through all gear positions, ending in Park. Turn A/C switch on, then off (if equipped).
  2. Turn engine off. Without starting engine again, turn ignition on, off, on, off, and on. Record 2-digit fault codes as displayed by the flashing CHECK ENGINE light.
  3. For example, 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. Once CHECK ENGINE light begins to flash fault codes, it cannot be stopped. If you lose count, it will be necessary to start over. Code 55 indicates end of fault code display.
  5. Refer to FAULT CODES  table to translate fault code number to a system fault description (display on DRB-II). Once fault code description is obtained, refer to appropriate NO START TEST 1A (NS-1A) or DRIVEABILITY TEST 1A (DR-1A) trouble shooting chart for additional testing procedures.
  6. As an example, a 3.0L engine starts and runs, but has a driveability problem, and CHECK ENGINE light indicates a Code 14. Refer to FAULT CODES  table to translate fault code number to a system fault description (display on DRB-II).
  7. When system fault description (display on DRB-II) is obtained, refer to appropriate DRIVEABILITY TEST 1A (DR-1A) trouble shooting chart, since vehicle has a driveability problem, for more testing procedures. Select fault message and corresponding test from table, and proceed to appropriate trouble shooting chart. Test procedure may vary depending whether fault code is a hard or intermittent failure.
NOTE: When using trouble shooting charts for diagnosis, DO NOT  skip any steps in chart, or incorrect diagnosis may result.
NOTE: The DRB-II can also be used to perform the following: display the state or values of sensors, inputs/outputs and components, allow various outputs such as valves and hydraulics to be tested, and reset Emission Maintenance Reminder (EMR) functions. See OPERATING MODES  and EMISSION MAINTENANCE REMINDER (EMR) in this article.
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