Diagnosis Procedure

WARNING: This page is about a different car, the 2012 Nissan Pathfinder. 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 "CONSULT FUNCTION (TRANSMISSION) ".

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

YES: Check CAN communication line. Refer to U1000 CAN COMM CIRCUIT .

NO: GO TO 2.
CHECK STOP LAMP SWITCH CIRCUIT
With CONSULT
1. Turn ignition switch "ON". (Do not start engine.)
2. Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.
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 1 and 2.

Item	Condition	Terminal	Continuity
Stop lamp switch harness connector	When brake pedal is depressed	1 - 2	Yes
Stop lamp switch harness connector	When brake pedal is released	1 - 2	No

Fig 1: Checking Continuity Between Stop Lamp Switch Connector Terminals 1 And 2

Courtesy of NISSAN NORTH AMERICA, INC.

Check stop lamp switch after adjusting brake pedal - refer to "INSPECTION AND ADJUSTMENT - STANDARD PEDAL " or "INSPECTION AND ADJUSTMENT - ADJUSTABLE 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 combination meter.

NG: Repair or replace the stop lamp switch.