Steering Control System (DTC/Circuit Diagnosis)

1. Turn ignition switch OFF.
2. Disconnect Power Steering Control Module harness connector.
3. Check continuity between Power Steering Control Module harness connector terminal and ground.

   Power Steering Control Module		--	Continuity
   Connector	Terminal
   E63	2	Ground	Yes

Is the inspection result normal?

YES

GO TO 2.

NO

Repair open circuit or short to ground or short to power in harness or connectors, and repair or replace the malfunctioning component.

Check voltage between Power Steering Control Module harness connector terminal and ground.

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 3.

1. Check the 100 A fusible link (#D).
2. Disconnect battery terminal with fusible link harness connector.
3. Check continuity between Power Steering Control Module harness connector terminal and battery terminal with fusible link harness connector terminal.

   Power Steering Control Module		Battery terminal with fusible link		Continuity
   Connector	Terminal	Connector	Terminal
   E63	1	E7	3	Yes

4. Check continuity between Power Steering Control Module harness connector terminal and ground.

   Power Steering Control Module		--	Continuity
   Connector	Terminal
   E63	1	Ground	No

Is the inspection result normal?

YES

Perform the trouble diagnosis for battery power supply circuit. Refer to .

NO

Repair or replace the malfunctioning component.

1. Check voltage between Power Steering Control Module harness connector terminals and ground.

   Power Steering Control Module		--	Voltage (Approx.)
   Connector	Terminal
   E62	5	Ground	0 V

2. Turn ignition switch ON.
   CAUTION: Never start the engine.
3. Check voltage between Power Steering Control Module harness connector terminals and ground.

   Power Steering Control Module		--	Voltage (Approx.)
   Connector	Terminal
   E62	5	Ground	Battery voltage

Is the inspection result normal?

YES

GO TO 6.

NO

GO TO 5.

1. Turn ignition switch OFF.
2. Check the 10 A fuse No. 49 in the IPDM E/R.
3. Disconnect IPDM E/R harness connector E119.
4. Check continuity between Power Steering Control Module harness connector terminal and IPDM E/R harness connector terminal.

   Power Steering Control Module		IPDM E/R		Continuity
   Connector	Terminal	Connector	Terminal
   E62	5	E119	35	Yes

5. Check continuity between Power Steering Control Module harness connector terminal and ground.

   Power Steering Control Module		--	Continuity
   Connector	Terminal
   E62	5	Ground	No

Is the inspection result normal?

YES

Perform the trouble diagnosis for ignition power supply circuit. Refer to .

NO

Repair or replace the malfunctioning component.

Check the Power Steering Control Module pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

Power Steering Control Module is malfunctioning. Replace Power Steering Oil Pump Assembly. Refer to Removal and Installation .

NO

Repair or replace the malfunctioning component.