Diagnostic Procedure

WARNING: This page is about a different car, the 2006 Infiniti G35. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CAN COMMUNICATION LINE
Perform self-diagnosis. Refer to "SELF-DIAGNOSTIC RESULT MODE ".

Is a malfunction in the CAN communication indicated in the results?
1. YES: Check CAN communication line. Refer to "DTC U1000 CAN COMMUNICATION LINE ".
2. NO: GO TO 2.

CHECK MANUAL MODE SWITCH CIRCUIT

With CONSULT-II

Turn ignition switch ON. (Do not start engine.)
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.
Read out ON/OFF switching action of "MANU MODE SW""NON M-MODE SW""UP SW LEVER""DOWN SW LEVER".

DIAGNOSTIC REFERENCE

Item name	Condition	Display value
MANU MODE SW	Manual shift gate position (neutral)	ON
MANU MODE SW	Other than the above	OFF
NON M-MODE SW	Manual shift gate position	OFF
NON M-MODE SW	Other than the above	ON
UP SW LEVER	Selector lever: +side	ON
UP SW LEVER	Other than the above	OFF
DOWN SW LEVER	Selector lever: -side	ON
DOWN SW LEVER	Other than the above	OFF

Fig 1: Identifying CONSULT-II Data Monitor

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

Without CONSULT-II

Drive vehicle in the manual mode, and confirm that the actual gear position and the meter's indication of the position mutually coincide when the selector lever is shifted to the "+ (up)" or "- (down)" side (1st --> 5th gear).

OK or NG

OK: GO TO 4.
NG: GO TO 3.

DETECT MALFUNCTIONING ITEM
Check the following.
- Manual mode switch. Refer to "COMPONENT INSPECTION ".
- Pin terminals for damage or loose connection with harness connector.
- Open circuit or short to ground or short to power in harness or connector for A/T control device (manual mode switch).
- Combination meter. Refer to "COMBINATION METERS ".
OK or NG
1. OK: GO TO 4.
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 5.
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 6.
2. NG: Repair or replace damaged parts.
DETECT MALFUNCTIONING ITEM

Check the following.

A/T assembly harness connector pin terminals for damage or loose connection with harness connector.

OK or NG

OK: Replace control valve with TCM. Refer to "CONTROL VALVE WITH TCM AND A/T FLUID TEMPERATURE SENSOR 2 ".
NG: Repair or replace damaged parts.