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4 CHECK POWER STEERING OIL PRESSURE SWITCH GROUND CIRCUIT FOR OPEN AND SHORT 1. Turn ignition switch “OFF”. SEF286X 3. Check harness continuity between power steering oil pressure switch terminal 1 and engine ground. Refer to Wiring Diagram. Continuity should exist. 4. Also check harness for short to power. OK or NG OK © GO TO 5. NG © Repair open circuit or short to power in harness or connectors. 5 CHECK POWER STEERING OIL PRESSURE SWITCH INPUT SIGNAL CIRCUIT FOR OPEN AND SHORT 1. Disconnect ECM harness connector. Diagram. Continuity should exist. 3. Also check harness for short to ground and short to power. OK or NG OK © GO TO 6. NG © Repair open circuit or short to ground or short to power in harness or connectors. 6 CHECK POWER STEERING OIL PRESSURE SWITCH 1. Disconnect power steering oil pressure switch harness connector then start engine. SEF364X OK or NG OK © GO TO 7. NG © Replace power steering oil pressure switch. GI MA EM LC FE AT AX SU BR ST RS BT HA SC EL IDX POWER STEERING OIL PRESSURE SWITCH Diagnostic Procedure (Cont’d) EC-631 |