2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 577
Manual mode switch: ON
Gear position: "1" position
Accelerator opening: 0.6/8 or more
Vehicle speed: 10 km/h (6 MPH) or more
4. Check DTC. If DTC is detected, go to See: P Code Charts/P0731/5AT RE5R05A.
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
With CONSULT-III
- Select "SELF-DIAG RESULTS" in "TRANSMISSION".
Without CONSULT-III
- Perform the self-diagnosis. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Scan Tool Testing and
Procedures/5AT RE5R05A/Trouble Diagnosis/Diagnosis Procedure Without CONSULT-III.
Is a malfunction in the CAN communication indicated in the results?
YES - Check CAN communication line. See: U Code Charts/U1000/AT/5AT RE5R05A.
NO - GO TO 2.
2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/5AT RE5R05A/Main Power Supply and Ground Circuit.
OK or NG
OK - GO TO 3.
NG - Repair or replace damaged parts.
3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
2. Perform See: P Code Charts/P0731/5AT RE5R05A.
OK or NG
OK - INSPECTION END
NG - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. See: Powertrain Management/Transmission Control
Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/5AT RE5R05A/Road Test.
7AT RE7R01A
P0731 1GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 1GR position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
- " See: P Code Charts/P0731/7AT RE7R01A" must be performed before starting "DTC CONFIRMATION PROCEDURE".
- Never perform "DTC CONFIRMATION PROCEDURE" before completing the repair, which may cause secondary malfunction.
- Always drive vehicle at a safe speed.
1.PRECONDITIONING
If "DTC CONFIRMATION PROCEDURE" is previously conducted, always turn ignition switch OFF and wait at least 10 seconds before
