Diagnosis Procedure

WARNING: This page is about a different car, the 2013 Nissan Armada. 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 DTC WITH TCM

With CONSULT

Start engine.
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT.

While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.

Item name	Condition	Display value (RPM)
ENGINE SPEED	Engine running	Closely matches the tachometer reading.

OK or NG

OK: GO TO 3.

NG: Check the ignition signal circuit. Refer to DIAGNOSIS PROCEDURE .

CHECK DTC
Perform "DTC Confirmation Procedure".
- Refer to "DTC CONFIRMATION PROCEDURE ".
  OK or NG
  
  OK: INSPECTION END
  
  NG: GO TO 4.
CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to "DIAGNOSIS PROCEDURE ".

OK or NG

OK: GO TO 5.

NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM
Check the following items:
- The A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
  OK or NG
  
  OK: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM ".
  
  NG: Repair or replace damaged parts.