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Test M: Check Engine/Malfunction Warning Indicator Inoperative

  1. Turn ignition switch to LOCK position. Disconnect Powertrain Control Module (PCM) 104-pin harness connector C202. PCM is mounted on cowl in right rear of engine compartment. Install EEC-V 104-Pin Breakout Box (014-00950), leaving PCM disconnected. Turn ignition switch to RUN position. Connect a fused jumper wire between breakout box test pins No. 2 and 24. If check engine warning indicator is illuminated, check engine warning indicator circuits. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. If check engine warning indicator is not illuminated, go to next step.
  2. Turn ignition switch to LOCK position. Remove instrument cluster. See INSTRUMENT CLUSTER  under REMOVAL & INSTALLATION. Remove check engine warning indicator bulb and check continuity between bulb terminals. If continuity exists, go to next step. If continuity does not exist, replace bulb. Recheck system operation.
  3. Measure resistance between breakout box test pin No. 2 and instrument cluster Black 12-pin harness connector C287 terminal No. 9 (Pink/Light Green wire). See Figure . If resistance is less than 5 ohms, replace instrument cluster printed circuit. See PRINTED CIRCUIT  under REMOVAL & INSTALLATION. Recheck system operation. If resistance is 5 ohms or more, repair open in Pink/Light Green wire between instrument cluster and PCM. See WIRING DIAGRAMS  . Recheck system operation.
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