Diagnosis Procedure

1. Turn the ignition switch OFF.
2. Check the voltage between power steering control unit harness connector and ground.

   Power steering control unit		--	Condition		Voltage (Approx.)
   Connector	Terminal
   M108	1	Ground	Vehicle speed: 0 km/h (0 MPH) (Engine is running)		4.4 - 6.6 V
   			Vehicle speed: 100 km/h (62 MPH)		2.4 - 3.6 V

Is the inspection result normal?

YES

GO TO 4.

NO

GO TO 2.

1. Turn the ignition switch OFF.
2. Disconnect power steering solenoid valve harness connector.
3. Disconnect power steering control unit harness connector.
4. Check the continuity between power steering solenoid valve harness connector and the power steering control unit harness connector.

   Power steering solenoid valve		Power steering control unit		Continuity
   Connector	Terminal	Connector	Terminal
   F45	1	M108	1	Existed
   	2		5	Existed

5. Check the continuity between power steering control unit harness connector and ground.

   Power steering control unit		--	Continuity
   Connector	Terminal
   M108	1	Ground	Not existed
   	5

Is the inspection result normal?

YES

GO TO 3.

NO

Repair or replace error-detected parts.

Check the power steering solenoid valve. Refer to Component Inspection .

Is the inspection result normal?

YES

GO TO 4.

NO

Replace gear-sub assembly. Refer to STEERING GEAR AND LINKAGE : Disassembly & Assembly .

• Check the power steering control unit pin terminals for damage or loose connection with harness connector.
• Check the power steering solenoid valve pin terminals for damage or loose connection with harness connector.

Is the inspection result normal?

YES

Replace power steering control unit. Refer to POWER STEERING CONTROL UNIT : Removal & Installation .

NO

Repair or replace error-detected parts.