Nissan Altima 2007-2012 Service Manual: B2614 ACC relay circuit
Description
BCM controls the various electrical components and simultaneously supplies power according to the power supply position.
BCM checks the power supply position internally.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
1. PERFORM DTC CONFIRMATION PROCEDURE
1. Turn the power supply position to ACC under the following conditions, and wait for at least 1 second.
- CVT selector lever is in the P or N position.
- Release the brake pedal.
2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected? YES >> Go to PCS-65, "Diagnosis Procedure".
NO >> Inspection End.
Diagnosis Procedure
1. CHECK ACCESSORY RELAY POWER SUPPLY
1. Turn ignition switch OFF.
2. Disconnect accessory relay.
3. Check voltage between accessory relay harness connector and ground under the following conditions.
Is the inspection result normal? YES >> GO TO 3
NO >> GO TO 2
2. CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect BCM harness connector.
3. Check continuity between accessory relay harness connector (A) and BCM harness connector (B).
4. Check continuity between accessory relay harness connector and ground.
Is the inspection result normal? YES >> GO TO 6
NO >> Repair or replace harness.
3. CHECK ACCESSORY RELAY GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Check continuity between accessory relay harness connector and ground.
Is the inspection result normal? YES >> GO TO 4
NO >> Repair or replace harness.
4. CHECK ACCESSORY RELAY POWER SUPPLY CIRCUIT-2
Check voltage between accessory relay harness connector and ground.
Is the inspection result normal? YES >> GO TO 5
NO >> Repair or replace harness.
5. CHECK ACCESSORY RELAY
Refer to PCS-67, "Component Inspection (Accessory Relay)".
YES or NO
YES >> GO TO 6
NO >> Replace accessory relay.
6. CHECK INTERMITTENT INCIDENT
Refer to GI-42, "Intermittent Incident".
>> Inspection End.
Component Inspection (Accessory Relay)
1. CHECK ACCESSORY RELAY
1. Turn ignition switch OFF.
2. Remove accessory relay.
3. Check the continuity between accessory relay terminals under the following conditions.
Is the inspection result normal? YES >> Inspection End.
NO >> Replace accessory relay
B2611 ACC relay
Description
BCM turns ON the ACC relay to supply ACC power to each ECU when the power
supply position changes to
ACC.
BCM check ACC relay ON request for consistency with the actual ACC relay
...
B2615 blower relay circuit
Description
BCM controls the various electrical components and simultaneously supplies
power according to the power
supply position.
BCM checks the power supply position internally.
DTC Logic ...
Other materials:
P0603 ECM Power supply
Description
Battery voltage is supplied to the ECM even when the ignition switch
is turned OFF for the ECM memory function of the DTC memory, the
air-fuel ratio feedback compensation value memory, the idle air volume
learning value memory, etc.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMAT ...
IPDM E/R (Intelligent power distribution
module engine room)
Reference Value
VALUES ON THE DIAGNOSIS TOOL
TERMINAL LAYOUT
PHYSICAL VALUES
Wiring Diagram — Sedan
Fail Safe
CAN COMMUNICATION CONTROL
When CAN communication with ECM and BCM is impossible, IPDM E/R performs
fail-safe control. After CAN
communication recov ...
Mode door motor
Removal and Installation
REMOVAL
1. Remove the combination meter. Refer to MWI-176, "Removal and
Installation".
2. Remove the BCM (2). Refer to BCS-96, "Removal and Installation".
NOTE:
The illustration is shown with the heater and cooling unit assembly
out of the ve ...