2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 597
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.
P0780
P0780 SHIFT
Description
- TCM detects the malfunction of low brake solenoid valve.
- TCM measures the downshift time from 4GR to 3GR during "D" position, and detects the malfunction if the shifting time is excessively short.
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 "GEAR" in "Data Monitor" in "TRANSMISSION".
3. Shift the selector lever to "D" position.
4. Accelerate until "4" appears on "GEAR", then release the accelerator pedal.
5. Decelerate until "3" appears on "GEAR" by depressing the brake pedal gradually.
CAUTION:
The brake pedal must be depressed slowly.
6. Then repeat steps 4 to 5 three more times.
7. Stop the vehicle, and then turn the ignition switch OFF.
8. Perform steps 1 to 7 again.
9. Perform "Self Diagnostic Results" in "TRANSMISSION".
With GST
Follow the procedure "With CONSULT-III".
Is "P0780" detected?
YES - Go to See: P Code Charts/P0780.
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.
P0795
P0795 PRESSURE CONTROL SOLENOID C
Description
- The front brake solenoid valve is controlled by the TCM in response to signals transmitted from the transmission range switch, output speed
sensor and accelerator pedal position sensor (throttle position sensor).
Gears will then be shifted to the optimum position.
- The front brake solenoid valve controls the front brake control valve in response to a signal transmitted from the TCM.
