FixVault
Home › Acura › 1995 › Integra GS-R, 2D Coupe › Repair and Diagnosis › Engine Performance › System › Engine Controls - Tests W/Codes › Trouble Codes › Code 0 Or No Codes › MIL Stays On

MIL Stays On

  1. Retrieve fault codes. See RETRIEVING CODES  under SELF-DIAGNOSTIC SYSTEMS. Service codes as necessary. If no codes exist, remove jumper from service connector. Start engine. If engine starts, go to next step. If engine does not start, inspect ECM fuse in underhood fuse/relay box. If fuse is okay, go to step 4).
  2. Turn ignition off. Connect ECM Test Harness (07LAJ-PT3010A ) between ECM and ECM harness. See Figure . Turn ignition on. Measure voltage between terminals D4 (+) and D22 (-). If voltage is not 5 volts, repair short to ground between ECM terminal D4 and self-diagnostic connector. If voltage is 5 volts, connect jumper wire between self-diagnostic connector terminals. Measure voltage between terminals D4 and D22. If voltage is not 5 volts, go to next step. If voltage is 5 volts, repair open circuit D4 (Brown/White wire) between ECM and self-diagnostic connector.
  3. Remove jumper wire from self-diagnostic connector. Turn ignition off. Unplug connector "A" from ECM. Turn ignition on. If MIL stays on, repair short circuit in Green/Orange wire between ECM terminal A13 and MIL. If MIL goes out, temporarily substitute known good ECM, then retest system.
  4. Remove jumper wire from self-diagnostic connector. Inspect fuse No. 24 in underdash fuse/relay box. Replace fuse if necessary. If fuse is okay, turn ignition on. Unplug 3-pin connectors from MAP sensor and throttle position sensor. If MIL stays on, go to next step. If MIL goes out, replace sensor that caused light to go out.
  5. Turn ignition off. Connect ECM Test Harness (07LAJ-PT3010A ) between ECM and ECM harness. Leave connector "D" unattached from ECM. Test for continuity between terminals D19 and D20. If continuity does not exist, go to next step. If continuity exists, inspect for short to ground in following circuits:
    • D19 (Yellow/Red wire) between ECM and MAP sensor.
    • D20 (Yellow/White wire) between ECM and throttle position sensor.
  6. Ensure all wiring harnesses are connected to sensors. Attach connector "D" to ECM. Turn ignition on. Individually measure voltage between body ground and terminals A23, A24, A26, and B2. If voltage is less than one volt, go to next step. If voltage is one volt or more, repair open circuit A23 and A24 (Black wires) or A26 and B2 (Brown/Black wires).
  7. Measure voltage between terminal A26 (-) and terminals A25 (+) and B1 (+). If battery voltage does not exist, inspect main relay and wiring harness connector. If relay and connector are okay, repair open circuit between ECM terminals A25 and B1 (Yellow/Black wire) and main relay. If battery voltage exists, temporarily substitute known good ECM, then retest system.
About FixVault