Nissan Altima 2007-2012 Service Manual: BCM
Diagnosis Procedure
1. CHECK FUSE AND FUSIBLE LINK
Check if the following BCM fuse or fusible link are blown.
Is the fuse or fusible link blown? YES >> Replace the blown fuse or fusible link after repairing the affected circuit.
NO >> GO TO 2
2. CHECK POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM.
3. Check voltage between BCM harness connector and ground.
Is the measurement normal? YES >> GO TO 3
NO >> Repair or replace harness.
3. CHECK GROUND CIRCUIT
Check continuity between BCM harness connector and ground.
Does continuity exist? YES >> Inspection End.
NO >> Repair or replace harness.
Special Repair Requirement
1. REQUIRED WORK WHEN REPLACING BCM
Initialize control unit. Refer to BCS-6, "CONFIGURATION (BCM) : Special Repair Requirement".
>> Work End.
IPDM E/R (intelligent power distribution
module engine room)
Diagnosis Procedure
1. CHECK FUSES AND FUSIBLE LINK
Check that the following IPDM E/R fuses or fusible link are not blown.
Is the fuse blown?
YES >> Replace the blown fuse or fusible link ...
Other materials:
Diagnosis and repair work flow
Work Flow
OVERALL SEQUENCE
*1 SRC-12, "Trouble Diagnosis Introduction"
Introduction"
*2 SRC-12, "SRS Operation Check"
*3 SRC-5, "Trouble Diagnosis with
CONSULT-III"
*4 SRC-14, "Self-Diagnosis Function
(Without CONSULT-III)"
DETAILED WORK FLOW
...
P1421 cold start control
Description
ECM controls ignition timing and engine idle speed when engine is started
with prewarming up condition.
This control promotes the activation of three way catalyst by heating the
catalyst and reduces emissions.
DTC Logic
DTC DETECTION LOGIC
NOTE:
If DTC P1421 is displayed wit ...
AV 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 terminals and connectors of the AV control unit for damage, bend
and loose connection (unit
side and connector side).
I ...