Nissan Altima 2007-2012 Service Manual: Power supply and ground circuit

Description

• EPS system functions by ignition power supply.

Diagnosis Procedure

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 M59 terminal 3 and ground.

4. Turn the ignition switch ON.

CAUTION: Never start the engine.

5. Check voltage between power steering control unit harness connector M59 terminal 3 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 (#3) open - Harness for short or open between ignition switch and power steering control unit harness connector No. 3 terminal.

- Ignition switch.

2.CHECK GROUND CIRCUIT

1. Turn the ignition switch OFF.

2. Check continuity between power steering control unit harness connector M59 terminal 6 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.

    Component diagnosis
    ...

    Power steering solenoid valve
    Description • Power steering solenoid valve controls the power steering oil pressure in the gear housing assembly. Diagnosis Procedure 1.CHECK POWER STEERING SOLENOID VALVE SIGNAL 1. Start e ...

    Other materials:

    Drive belt
    QR25DE eng 1. Crankshaft pulley 2. Drive belt Automatic tensioner 3. Water pump pulley 4. Alternator 5. Air conditioner WARNING Be sure the ignition switch is placed in the OFF or LOCK position before servicing drive belt. The engine could rotate unexpectedly. 1. Visually inspect the be ...

    BCM (Body control module)
    Reference Value VALUES ON THE DIAGNOSIS TOOL Terminal Layout Physical Values 1: Sedan only 2: With LH front window anti-pinch 3: With LH and RH front window anti-pinch 4: With Intelligent Key 5: Without Intelligent Key Wiring Diagram-Coupe ...

    Passenger side
     Description Door glass moves UP/DOWN by receiving the signal from main power window and door lock/unlock switch or power window and door lock/unlock switch RH. Component Function Check 1. CHECK POWER WINDOW MOTOR CIRCIUT Does power window motor operate with operating main power window ...