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STC-6 < COMPONENT DIAGNOSIS > [EPS] POWER SUPPLY AND GROUND CIRCUIT COMPONENT DIAGNOSIS POWER SUPPLY AND GROUND CIRCUIT Description INFOID:0000000003552473 Power supply to EPS system Diagnosis Procedure INFOID:0000000003552474 1. CHECK POWER SUPPLY 1. Turn the ignition switch OFF. 2. Disconnect power steering control unit harness connector. 3. Check voltage between power steering control unit harness connector and ground. 4. Turn the ignition switch ON. CAUTION: Never start the engine. 5. Check voltage between power steering control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 2. NO >> Check the following. If any items are damaged, repair or replace damaged parts. • 10A fuses (#45) open nector No. 3 terminal. - Ignition switch. Refer to PCS-131, "Removal and Installation" 2. CHECK GROUND CIRCUIT 1. Turn the ignition switch OFF. 2. Check continuity between power steering control unit harness connector and ground. Is the inspection result normal? YES >> GO TO 3. NO >> Repair open circuit or short to power in harness or connectors. 3. CHECK TERMINALS AND HARNESS CONNECTORS Check power steering control unit pin terminals for damage or loose connection with harness connector. Is the inspection result normal? YES >> INSPECTION END NO >> Repair or replace damaged parts. Power steering control unit — Voltage Connector Terminal M108 3 Ground 0 V Power steering control unit — Voltage Connector Terminal M108 3 Ground Battery voltage Power steering control unit — Continuity Connector Terminal M108 6 Ground Existed |