Nissan Altima (L32) 2007-2012 Service Manual ≻ Security control system sedan with intelligent key ≻ Component diagnosis ≻ B2014 chain of strg-immu

Nissan Altima (L32) 2007-2012 Service Manual: B2014 chain of strg-immu

Description

BCM performs the ID verification with the steering lock unit to release the steering. BCM starts the communication with the steering lock unit when Intelligent Key is carried into the passenger compartment and the pushbutton ignition switch is pressed.

DTC Logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1. Lock steering.

2. Press the push-button ignition switch.

3. Check “Self Diagnostic Result” with CONSULT-III.

Is DTC detected? YES >> Refer to SEC-238, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis Procedure

1.CHECK STEERING LOCK UNIT POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect steering lock unit harness connector.

3. Check voltage between steering lock unit harness connector and ground while turning ignition switch from OFF to ACC.

Is the inspection result normal? YES >> GO TO 3

NO >> GO TO 2

2.CHECK STEERING LOCK UNIT POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

3. Check continuity between steering lock unit harness connector M32 (A) terminal 7 and BCM harness connector M19 (B) terminal 94.

4. Check continuity between steering lock unit harness connector M32 (A) terminal 7 and ground.

Is the inspection result normal? YES >> GO TO 6

NO >> Repair harness or connector.

3.CHECK STEERING LOCK UNIT GROUND CIRCUIT

Turn ignition switch OFF.

2. Check continuity between steering lock unit and ground.

Is the inspection result normal? YES >> GO TO 4

NO >> Repair harness or connector.

4.CHECK STEERING LOCK UNIT COMMUNICATION SIGNAL

1. Connect steering lock unit harness connector.

2. Using an oscilloscope, read voltage signal between steering lock unit harness connector and ground.

Is the inspection result normal? YES >> Replace steering lock unit.

NO >> GO TO 5

5.CHECK STEERING LOCK UNIT COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

3. Check continuity between BCM harness connector M19 (A) terminal 99 and steering lock unit harness connector M32 (B) terminal 2.

4. Check continuity between BCM harness connector M19 (A) terminal 99 and ground.

Is the inspection normal? YES >> GO TO 6

NO >> Repair harness or connector.

6.CHECK INTERMITTENT INCIDENT

Refer to GI-42, "Intermittent Incident".

>> Inspection End.

B2013 ID discord, immu-strg

Description BCM performs the ID verification with the steering lock unit and releases the steering lock if both BCM and steering lock unit ID are same. BCM starts the communication with the steer ...

B2108 steering lock relay

Description The steering lock relay ON signal is transmitted to IPDM E/R by BCM via CAN communication. IPDM E/R turns the steering lock relay ON and transmits the release of the steering to B ...

Other materials:

Heated steering wheel switch (if so equipped)
Push the heated steering wheel switch to warm the steering wheel after the ignition switch is placed in the ON position. The indicator light will come on. If the surface temperature of the steering wheel is below 68ºF (20ºC), the system will heat the steering wheel and cycle off and on to mainta ...

ProPILOT Assist switches
DISTANCE switch: Long Middle Short RES+ switch: Resumes set speed or increases speed incrementally CANCEL switch: Deactivates the ProPILOT Assist system ProPILOT Assist switch: Turns the ProPILOT Assist system on or off SET- switch: Sets desired cruise speed or reduces speed i ...

Fuses
If any electrical equipment does not operate, check for an open fuse. Fuses are used in the passenger and engine compartment. Spare fuses are provided and can be found in the passenger compartment fuse box. When installing a fuse make sure the fuse is installed in the fuse box securely. Engine co ...