Diagnosis Procedure

WARNING: This page is about a different car, the 2008 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

SECURITY INDICATOR LAMP ACTIVE TEST

With CONSULT-III

Check "THEFT IND" in "ACTIVE TEST" mode with CONSULT-III.

Without CONSULT-III

Disconnect BCM.

Check voltage between BCM harness connector M18 terminal 23 and ground.

VOLTAGE SPECIFICATION

Connector	Terminals		Condition	Voltage (V) (Approx.)
Connector	(+)	(-)	Condition	Voltage (V) (Approx.)
M18	23	Ground	ON	0
M18	23	Ground	OFF	Battery voltage

Fig 1: Checking Voltage Between BCM Harness Connector M18 Terminal 23 And Ground

Is the inspection result normal?

YES: Security indicator lamp is OK.

NO: GO TO 2

SECURITY INDICATOR LAMP CHECK
Check security indicator lamp condition by performing the self-diagnosis test. Refer to "DIAGNOSIS DESCRIPTION ".

Is the inspection result normal?

YES: GO TO 3

NO: Replace combination meter. Refer to "REMOVAL AND INSTALLATION ".
CHECK HARNESS CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect BCM and combination meter connector.
3. Check continuity between BCM connector (A) M18 terminal 23 and combination meter harness connector (B) M24 terminal 35.
  23 - 35 : Continuity should exist.
4. Check continuity between BCM connector (A) M18 terminal 23 and ground.
  23 - Ground : Continuity should not exist.
  
  Fig 2: Checking Continuity Between BCM Connector M18 Terminal 23 And Ground
Is the inspection result normal?

YES: Replace the BCM. Refer to "REMOVAL AND INSTALLATION ".

NO: Repair or replace harness.