2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 707
With GST
Follow the procedure "With CONSULT-III".
Is "P1730" detected?
YES - Go to See: P Code Charts/P1730/7AT RE7R01A.
NO - INSPECTION END
Judgment of Interlock
See: Powertrain Management/Transmission Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/7AT
RE7R01A/Fail-Safe.
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.
P1731
P1731 1ST ENGINE BRAKING
Description
Fail-safe function to prevent sudden decrease in speed by engine brake other than at M1 position.
CONSULT-III Reference Value in Data Monitor Mode
On Board Diagnosis Logic
- This is not an OBD-II self-diagnostic item.
- Diagnostic trouble code "P1731" with CONSULT-III or 13th judgment flicker without CONSULT-III is detected under the following
conditions.
- When TCM does not receive the proper voltage signal from the sensor.
- When TCM monitors each ATF pressure switch and solenoid monitor value, and detects as irregular when engine brake of 1GR acts other than
at M1 position.
Possible Cause
- Harness or connectors
(Sensor circuit is open or shorted.)
- Low coast brake solenoid valve
- ATF pressure switch 2
DTC Confirmation Procedure
CAUTION:
- Always drive vehicle at a safe speed.
- Be careful not to rev engine into the red zone on the tachometer.
NOTE:
If "DTC Confirmation Procedure" has been previously preformed, always turn ignition switch OFF and wait at least 10 seconds before
performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-III
1. Start the engine.
2. Select "DATA MONITOR" in "TRANSMISSION".
3. Drive vehicle and maintain the following conditions for at least 2 consecutive seconds.
ENGINE SPEED: 1,200 rpm
MANU MODE SW: ON
GEAR: "1" position
4. If DTC is detected, go to See: P Code Charts/P1731.
