Diagnostic Procedure

WARNING: This page is about a different car, the 2005 Infiniti QX56. However, it is still accessible from the selected car via links, so may be relevant.

CHECK INPUT SIGNAL

WITH CONSULT-II

Start engine.
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.

Fig 1: Display DATA MONITOR Mode Screen
Courtesy of NISSAN MOTOR CO., U.S.A.

Vehicle start and read out the value of "TURBINE REV".

TURBINE REVOLUTION SENSOR DISPLAY VALUE TABLE

Item name	Condition	Display value (RPM)
TURBINE REV	During driving (lock-up ON)	Approximately matches the engine speed.

OK or NG

OK: GO TO 4.
NG: GO TO 2.

CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to "MAIN POWER SUPPLY AND GROUND CIRCUIT ".

OK or NG
1. OK: GO TO 3.
2. 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
1. OK: Replace the control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
2. NG: Repair or replace damaged parts.
CHECK DTC
Perform "DTC Confirmation Procedure".
- Refer to "DTC CONFIRMATION PROCEDURE ".
OK or NG
1. OK: INSPECTION END
2. NG: GO TO 2.