Diagnosis Procedure

WARNING: This page is about a different car, the 2011 Nissan Xterra. However, it is still accessible from the selected car via links, so may be relevant.

CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the battery cable from the negative terminal.
3. Check the terminals and connectors of the A/T assembly for damage, bend and loose connection (unit side and connector side).
  Is the inspection result normal?
  
  YES: GO TO 2.
  
  NO: Repair the terminal and connector.

CHECK HARNESS FOR OPEN CIRCUIT

Disconnect the connector of A/T assembly.

Check the resistance between the A/T assembly harness connector terminals.

RESISTANCE REFERENCE CHART

A/T assembly harness connector			Resistance (Ω)
Connector No.	Terminal No.		Resistance (Ω)
F9	3	8	Approx. 54 - 66

Is the measurement value within the specification?

YES: GO TO 3.

NO: Repair the TCM branch line.

CHECK HARNESS FOR OPEN CIRCUIT

Remove the control valve with TCM. Refer to "REMOVAL AND INSTALLATION ".
Disconnect the connector of TCM.

Check the continuity between the A/T assembly harness connector and TCM harness connector.

CONTINUITY REFERENCE CHART

A/T assembly harness connector	TCM harness connector		Continuity
Terminal No.	Connector No.	Terminal No.	Continuity
3	F502	1	Existed
8	F502	2	Existed

Is the inspection result normal?

YES: GO TO 4.

NO: Repair the harness between the A/T assembly harness connector and TCM harness connector.

CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to "DIAGNOSIS PROCEDURE ".

Is the inspection result normal?

YES (Present error): Replace the control valve with TCM. Refer to "REMOVAL AND INSTALLATION ".

YES (Past error): Error was detected in the TCM branch line.

NO: Repair the power supply and the ground circuit.