Nissan Juke Service and Repair Manual : BCM branch line circuit

Diagnosis Procedure

1.CHECK CONNECTOR

1. Turn the ignition switch OFF.

2. Disconnect the battery cable from the negative terminal.

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

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 BCM.

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

- Models with Intelligent Key system

- Models without Intelligent Key system


- Models without Intelligent Key system

Is the measurement value within the specification?


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

NO >> Repair the BCM branch line.

3.CHECK POWER SUPPLY AND GROUND CIRCUIT

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

• Models with Intelligent Key system: BCS-87, "Diagnosis Procedure" • Models without Intelligent Key system: BCS-155, "Diagnosis Procedure"

Is the inspection result normal? YES (Present error)>>Replace the BCM. Refer to the following.

• Models with Intelligent Key system: BCS-93, "Removal and Installation" • Models without Intelligent Key system: BCS-161, "Removal and Installation"

YES (Past error)>>Error was detected in the BCM branch line.

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

    PTC branch line circuit
    Diagnosis Procedure 1.CHECK CONNECTOR 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Check the terminals and connectors of the PTC heater control u ...

    Can communication circuit
    Diagnosis Procedure 1.CONNECTOR INSPECTION 1. Turn the ignition switch OFF. 2. Disconnect the battery cable from the negative terminal. 3. Disconnect all the unit connectors on CAN communication s ...

    Other materials:

    P0420 three way catalyst function
    DTC Logic DTC DETECTION LOGIC The ECM monitors the switching frequency ratio of air fuel ratio (A/F) sensor 1 and heated oxygen sensor 2. A three way catalyst (manifold) with high oxygen storage capacity will indicate a low switching frequency of heated oxygen sensor 2. As oxygen storage c ...

    Lubricant
    Description MAINTENANCE OF LUBRICANT LEVEL The compressor lubricant is circulating in the system together with the refrigerant. It is necessary to fill compressor with lubricant when replacing A/C system parts or when a large amount of refrigerant leakage is detected. It is important to alwa ...

    U1000 can comm circuit
    Description CAN (Controller Area Network) is a serial communication system for real time application. It is an on-vehicle multiplex communication system with high data communication speed and excellent error detection ability. Many electronic control units are equipped onto vehicles, and ea ...