Nissan Sentra Service Manual: 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? 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.
Strg 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 steering angle sensor for ...
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:
DTC/circuit diagnosis
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 equip ...
Component parts
Component parts location
Bcm (view with instrument panel removed)
Ipdm e/r (rear window defogger relay)
A/c auto amp. (View with a/c switch
assembly removed)
A/C switch assembly (rear window defogger
switch) (with auto A/C)
A/c switch assembly (rear window
defogger switch) (wit ...
Parking brake switch signal circuit
Component function check
1.Check parking brake switch operation
Check that brake warning lamp in combination meter turns on/off when parking
brake is actuated.
Is the inspection result normal?
Yes >> inspection end.
No >> proceed to diagnosis procedure. Refer to mwi-60, " ...