Nissan Altima 2007-2012 Service Manual: ECM branch line circuit

Diagnosis Procedure

INSPECTION PROCEDURE

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).

- ECM

- Harness connector E30

- Harness connector M1

Is the inspection result normal? YES >> GO TO 2.

NO >> Repair the terminal and connector.

2.CHECK HARNESS FOR OPEN CIRCUIT

1. Disconnect the connector of ECM.

2. Check the resistance between the ECM harness connector terminals.

Is the measurement value within the specification? YES >> GO TO 3.

NO >> Repair the ECM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

Check the power supply and the ground circuit of the ECM. Refer to the following.

• QR engine models for California: EC-144, "Diagnosis Procedure" • QR engine models expect for California: EC-673, "Diagnosis Procedure" • VQ engine models: EC-1175, "Diagnosis Procedure" Is the inspection result normal? YES (Present error)>>Replace the ECM. Refer to the following.

• QR engine models for California: EC-27, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" • QR engine models except for California: EC-563, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" • VQ engine models: EC-1051, "ADDITIONAL SERVICE WHEN REPLACING CONTROL UNIT : Special Repair Requirement" YES (Past error)>>Error was detected in the ECM branch line.

NO >> Repair the power supply and the ground circuit.

    Main line between DLC and ABS circuit
    Diagnosis Procedure INSPECTION PROCEDURE 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the following terminals and co ...

    A-BAG branch line circuit
    Diagnosis Procedure 1.CHECK AIR BAG DIAGNOSIS SENSOR UNIT Check the air bag diagnosis sensor unit. Refer to SRC-3, "Work Flow". Is the inspection result normal? YES >> Replace t ...

    Other materials:

    Body component parts
    Underbody Component Parts 1. Upper dash assembly 2. Lower dash crossmember reinforcement 3. Rear crossmember (RH, LH) 4. Front crossmember (RHLH) 5. Front sidemember reinforcement upper (RHLH) 6. Front floor assembly (RHLH) 7. Front sidemember reinforcement lower 8. Front floor center 9. ...

    P0102, P0103 maf sensor
    Description The mass air flow sensor (1) is placed in the stream of intake air. It measures the intake flow rate by measuring a part of the entire intake flow. The mass air flow sensor controls the temperature of the hot wire to a certain amount. The heat generated by the hot wire is reduced a ...

    iPod®* player operation with Navigation System (if so equipped)
    Connecting iPod® WARNING Do not connect/disconnect or operate the USB device while driving. Doing so can be a distraction. If distracted you could lose control of your vehicle and cause an accident or serious injury. CAUTION ● Do not force the USB device into the USB port. Insertin ...