Nissan Sentra Service Manual: BCM branch line circuit

Nissan Sentra Service Manual / Electrical & power control / Lan system / Can system (type 5) / BCM branch line circuit

Diagnosis procedure

1.Check connector

Turn the ignition switch off.
Disconnect the battery cable from the negative terminal.
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

Disconnect the connector of bcm.
Check the resistance between the bcm harness connector terminals.

Without intelligent key system

With 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.

With intelligent key system: refer to bcs-67, "diagnosis procedure".
Without intelligent key system: refer to bcs-120, "diagnosis procedure".

Is the inspection result normal? Yes (present error)>>replace the bcm. Refer to the following.

With Intelligent Key system: Refer to BCS-73, "Removal and Installation".
Without intelligent key system: refer to bcs-126, "removal and installation".

Yes (past error)>>error was detected in the bcm branch line.

No >> repair the power supply and the ground circuit.

Hvac branch line circuit

Diagnosis procedure 1.Check connector Turn the ignition switch off. Disconnect the battery cable from the negative terminal. Check the terminals and connectors of the a/c auto amp. For damage ...

Can communication circuit

Diagnosis procedure 1.Connector inspection Turn the ignition switch off. Disconnect the battery cable from the negative terminal. Disconnect all the unit connectors on CAN communication syste ...

Other materials:

Front passenger side power window does not operate
When both power window main switch and front power window switch are operated WHEN BOTH POWER WINDOW MAIN SWITCH AND FRONT POWER WINDOW SWITCH ARE OPERATED : Diagnosis Procedure 1.CHECK FRONT POWER WINDOW SWITCH (PASSENGER SIDE) Check front power window switch (passenger side). Refer to PW ...

Precaution
Precaution for supplemental restraint system (srs) "air bag" and "seat belt pre-tensioner" The supplemental restraint system such as вЂњair bagвЂќ and вЂњseat belt pre-tensionerвЂќ, used along with a front seat belt, helps to reduce the risk or severity of inju ...