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3 CHECK OVERALL FUNCTION Without CONSULT-II 1. Start engine. SEF148X MTBL0142 OK or NG OK © INSPECTION END NG © GO TO 4. 4 CHECK GROUND CIRCUIT 1. Turn ignition switch “OFF”. Refer to wiring diagram. Continuity should exist. 4. Also check harness for short to ground and short to power. OK or NG OK © GO TO 5. NG © Repair open circuit or short to ground or short to power in harness or connectors. 5 CHECK INPUT SIGNAL CIRCUIT 1. Disconnect ECM harness connector. Refer to wiring diagram. Continuity should exist. 3. Also check harness for short to ground and short to power. OK or NG OK © GO TO 7. NG © GO TO 6. 6 DETECT MALFUNCTIONING PART Check the following. I Harness connectors F4, E42 I Harness for open or short between ECM and power steering oil pressure switch © Repair open circuit or short to ground or short to power in harness or connectors. Condition Voltage When steering wheel is turned quickly Approximately 0V Except above Approximately 5V POWER STEERING OIL PRESSURE SWITCH QG16 I 18DE Diagnostic Procedure (Cont’d) EC-345 |