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PGM-FI System MIL Circuit Troubleshooting (cont'd) (From page Check for an open in the wires 1. Reconnect the fuel injector and IAC valve connectors. 2. Measure voltage between body ground and the PCM Is there less than 1.0 V? YES Check for a short in the wires Measure voltage between body terminals DID and 021 individu- Is there about 5 V? NO YES Substitute a known-good PCM PCM CONNECTOR A (26P) LG1 Repair open in the wire(s) Check for a short in a sensor: body ground and the PCM con- — MAP sensor Is there about 5 V? NO Check for a short in the wires 1. Turn the ignition switch OFF. 2. Disconnect the ECM connec- tor D (22P). 3. Check for continuity between body ground and ECM con- Is there continuity? NO Substitute a known-good PCM Wire side of female terminals Replace the sensor that had Repair short in the wire between the MAP sensor, TP sensor, EGR Main Menu Table of Contents |