2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 703
DTC Confirmation Procedure
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If "DTC Confirmation Procedure" has been previously performed, 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 5 consecutive seconds.
VHCL/S SE-MTR: 30 km/h (19 MPH) or more
ACCELE POSI: 1.0/8 or less
4. If DTC is detected, go to See: P Code Charts/P1721/5AT RE5R05A.
Diagnosis Procedure
1.CHECK CAN COMMUNICATION LINE
With CONSULT-III
- Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.
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 malfunction in the CAN communication indicated in the result?
YES - Check CAN communication line. See: U Code Charts/U1000/AT/5AT RE5R05A See: U Code Charts/U1000/AT/5AT RE5R05A See: U
Code Charts/U1000/AT/5AT RE5R05A See: U Code Charts/U1000/AT/5AT RE5R05A.
NO - GO TO 2.
2.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "DATA MONITOR" in "TRANSMISSION".
3. Drive vehicle and read out the value of "VHCL/S SE-MTR". See: P Code Charts/P1721/5AT RE5R05A.
OK or NG
OK - GO TO 4.
NG - GO TO 3.
3.CHECK UNIFIED METER AND A/C AMP
Check unified meter and A/C amp. See: Instrument Panel, Gauges and Warning Indicators/Description and Operation/Unified Meter and A/C
Amp/System Description.
OK or NG
OK - GO TO 4.
NG - Repair or replace damaged parts.
4.CHECK DTC
Perform See: P Code Charts/P1721/5AT RE5R05A.
OK or NG
OK - INSPECTION END
NG - GO TO 5.
5.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. See: Diagrams/Electrical Diagrams/Transmission Control Systems/5AT RE5R05A/Main Power
Supply and Ground Circuit.
OK or NG
OK - GO TO 6.
NG - Repair or replace damaged parts.
6.DETECT MALFUNCTIONING ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK - Replace the control valve with TCM. See: Transmission and Drivetrain/Automatic Transmission/Transaxle/Valve Body/Service and Repair.
NG - Repair or replace damaged parts.
7AT RE7R01A
P1721 VEHICLE SPEED SIGNAL
Description
The vehicle speed signal is transmitted from unified meter and A/C amp. to TCM via CAN communication line.
The signal functions as an auxiliary device to the output speed sensor when it is malfunctioning. The TCM will then use the vehicle speed signal.
