Diagnosis Procedure

WARNING: This page is about a different car, the 2016 Infiniti Q50. 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 12V battery cable from the negative terminal.
3. Check the following terminals and connectors for damage, bend and loose connection (unit side and connector side).
  - A/T assembly
  - Harness connector F11
  - Harness connector E9
Is the inspection result normal?

YES

GO TO STEP 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.

A/T assembly harness connector			Resistance (Ω)
Connector No.	Terminal No.
F2	3	8	Approx. 54 - 66

Is the measurement value within the specification?

YES

GO TO STEP 3 .

Repair the TCM branch line.

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 & TCM. Refer to COMPONENT LOCATION (Replace A/T assembly if control valve & TCM is not listed in the latest parts list.).

YES (Past error)

Error was detected in the TCM branch line.

NO

Repair the power supply and the ground circuit.