2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 593
Perform See: P Code Charts/P0744/5AT RE5R05A.
OK or NG
OK - INSPECTION END
NG - GO TO 2.
7AT RE7R01A
P0744 TORQUE CONVERTER
Description
This malfunction is detected when the A/T does not shift into 7th gear position or the torque converter clutch does not lock-up as instructed by the
TCM. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve
sticking, improper solenoid valve operation, etc.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
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
performing the next test.
- GO TO 2.
2.CHECK DTC DETECTION
With CONSULT-III
1. Start the engine.
2. Select "MANU MODE SW", "GEAR" and "VEHICLE SPEED" in "Data Monitor" in "TRANSMISSION".
3. Drive vehicle and maintain the following conditions for 10 seconds or more.
NOTE:
Driving the vehicle uphill (increased engine load) will help maintain the driving conditions required for this test.
MANU MODE SW : ON
GEAR : 2
VEHICLE SPEED : 40 km/h (25 MPH) or more
4. Perform "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0744" detected?
YES - Go to See: P Code Charts/P0744/7AT RE7R01A.
NO - INSPECTION END
Diagnosis Procedure
1.CHECK INTERMITTENT INCIDENT
See: Testing and Inspection/Initial Inspection and Diagnostic Overview/How to Perform Efficient Diagnosis For an Electrical Incident.
Is the inspection result normal?
YES - Replace A/T assembly. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Service and Repair/Removal and
Replacement/7AT RE7R01A/Transmission Assembly/Exploded View.
NO - Repair or replace damaged parts.
5AT RE5R05A
P0745 PRESSURE CONTROL SOLENOID A
Description
The line pressure solenoid valve regulates the oil pump discharge pressure to suit the driving condition in response to a signal sent from the TCM.
CONSULT-III Reference Value in Data Monitor Mode
