Diagnostic Procedure

WARNING: This page is about a different car, the 2008 Infiniti M45 and 2008 Infiniti M35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ", "DIAGNOSTIC PROCEDURE WITHOUT CONSULT-III ".

Is a malfunction in the CAN communication indicated in the results?

Yes: Check CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE ".

NO: GO TO 2.
CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT-III
1. Turn ignition switch ON.
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-III.
3. Read out ON/OFF switching action of the "BRAKE SW".
OK or NG

OK: INSPECTION END

NG: GO TO 3.

CHECK STOP LAMP SWITCH

Check continuity between stop lamp switch harness connector terminals. Refer to "WIRING DIAGRAM - AT - NON DTC ".

CONTINUITY CHART

Condition	Continuity
When brake pedal is depressed	Yes
When brake pedal is released	No

Fig 1: Measuring Continuity Between Stop Lamp Switch Harness Connector Terminals

Courtesy of NISSAN MOTOR CO., U.S.A.

Check stop lamp switch after adjusting brake pedal - Refer to "BRAKE PEDAL ".

OK or NG

OK: Check the following. If NG, repair or replace damaged parts.

Harness for short or open between battery and stop lamp switch.
Harness for short or open between stop lamp switch and unified meter and A/C amp.
10A fuse (No.20, located in fuse block).

NG: Repair or replace the stop lamp switch.