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.
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:
Basic inspection
Diagnosis and repair workflow
Work Flow
OVERALL SEQUENCE
DETAILED FLOW
1.OBTAIN INFORMATION ABOUT SYMPTOM
Interview the customer to obtain as much information as possible about the
conditions and environment under
which the malfunction occurred.
>> GO TO 2.
2.CHECK SYMPTOM
...
Precautions for refrigerant system service
WORKING WITH HFC-134a (R-134a)
CAUTION:
CFC-12 (R-12) refrigerant and HFC-134a (R-134a) refrigerant are
not compatible. Compressor malfunction
is likely to occur if the refrigerants are mixed, refer to “CONTAMINATED
REFRIGERANT”
below. To determine the purity of HFC-134a (R- ...
Removal and installation
Bcm (body control module)
Removal and Installation
Note:
Before replacing bcm, perform “read configuration” to save or print
current vehicle specification. Refer
to bcs-116, "configuration (bcm) : description".
Removal
Disconnect the negative battery terminal. Refer to ...
