G37x Coupe AWD V6-3.7L (VQ37VHR) (2009)
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Check the power supply and the ground circuit of the TCM. Refer to See: Transmission Control Systems/Testing and Inspection/Component Tests and
General Diagnostics/Main Power Supply And Ground Circuit.
Is the inspection result normal?
YES (Present error) - Replace the control valve with TCM. Refer to See: Transmission Control Systems/Locations.
(Replace A/T assembly if control valve with 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.
CAN System (Type 8)
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the 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 F103
- Harness connector M116
Is the inspection result normal?
YES - GO TO 2.
NO - Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of A/T assembly.
2. Check the resistance between the A/T assembly harness connector terminals.
Is the measurement value within the specification?
YES - GO TO 3.
NO - Repair the TCM branch line.
3.CHECK POWER SUPPLY AND GROUND CIRCUIT
Check the power supply and the ground circuit of the TCM. Refer to See: Transmission Control Systems/Testing and Inspection/Component Tests and
General Diagnostics/Main Power Supply And Ground Circuit.
Is the inspection result normal?
YES (Present error) - Replace the control valve with TCM. Refer to See: Transmission Control Systems/Locations.
(Replace A/T assembly if control valve with 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.
CAN System (Type 9)
TCM BRANCH LINE CIRCUIT
Diagnosis Procedure
1.CHECK CONNECTOR
1. Turn the ignition switch OFF.
2. Disconnect the 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 F103
- Harness connector M116
Is the inspection result normal?
YES - GO TO 2.
NO - Repair the terminal and connector.
2.CHECK HARNESS FOR OPEN CIRCUIT
1. Disconnect the connector of A/T assembly.
2. Check the resistance between the A/T assembly harness connector terminals.
