Diagnostic Procedure

WARNING: This page is about a different car, the 2007 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 "SELF-DIAGNOSTIC RESULT MODE ".

Is any 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 OVERDRIVE CONTOROL SWITCH CIRCUIT

With CONSULT-II

Turn ignition switch "ON".
Select "ECU INPUT SIGNALS" in "DATA MONITOR" mode for "A/T" with CONSULT-II.

Fig 1: Identifying CONSULT II Display - DATA MONITOR

Read out "OD CONT SW".

Check the signal of the overdrive control switch is indicated properly.

DISPLAY VALUE CHART

Monitor item	Condition	Display value
OD CONT SW	Releasing overdrive control switch	OFF
OD CONT SW	Holding overdrive control switch	ON

Without CONSULT-II

Turn ignition switch "ON". (Do not start engine)

Check voltage between A/T control device connector terminal and ground.

CONNECTOR TERMINAL DATA CHART

Item	Connector No.	Terminal No.	Condition	Data (Approx.)
Overdrive control switch	M156	7 - Ground	Releasing overdrive control switch	Battery voltage
Overdrive control switch	M156	7 - Ground	Holding overdrive control switch	0V

OK or NG

OK: GO TO 5.

NG: GO TO 3.

CHECK OVERDRIVE CONTROL SWITCH

Turn ignition switch "OFF".
Disconnect A/T control device connector.

Check continuity between A/T control device connector M156 terminals 7 and 8.

CONTINUITY CHART

Condition	Continuity
Releasing overdrive control switch	No
Holding overdrive control switch	Yes

OK or NG

OK: GO TO 4.

NG: Repair or replace overdrive control switch.

DETECT MALFUNCTIONING ITEM
Check the following. If any items are damaged, repair or replace damaged parts.
- Harness for short or open between combination meter connector terminal 20 and A/T control device connector terminal 7.
- Harness for short or open between A/T control device connector terminal 8 and ground.
OK or NG

OK: GO TO 5.

NG: Repair or replace damaged parts.
CHECK COMBINATION METER
Check the combination meter. Refer to "HOW TO PROCEED WITH TROUBLE DIAGNOSIS ".

OK or NG

OK: INSPECTION END

NO: Repair or replace damaged parts.