2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 251
NOTE:
Perform the following steps before engine coolant temperature is above 96锟紺 (205锟紽).
2. Turn ignition switch ON.
3. Select "DATA MONITOR" mode with CONSULT-III.
4. Start engine.
5. Hold vehicle speed at more than 70 km/h (43 MPH) for 100 consecutive seconds.
CAUTION:
Always drive vehicle at a safe speed.
6. Check 1st trip DTC.
With GST
Follow the procedure "With CONSULT-III" above.
Is 1st trip DTC detected?
YES - Go to See: P Code Charts/P0127.
NO - INSPECTION END
Diagnosis Procedure
1.CHECK GROUND CONNECTION
1. Turn ignition switch OFF.
2. Check ground connections M16, M70. See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Component
Tests and General Diagnostics/Power Supply and Ground Circuit.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace ground connections.
2.CHECK INTAKE AIR TEMPERATURE SENSOR
See: P Code Charts/P0127.
Is the inspection result normal?
YES - GO TO 3.
NO - Replace mass air flow sensor (bank 1) (with intake air temperature sensor).
3.CHECK INTERMITTENT INCIDENT
See: Powertrain Management/Computers and Control Systems/Testing and Inspection/Initial Inspection and Diagnostic Overview/Trouble
Diagnosis For Intermittent Incident/Description.
- INSPECTION END
Component Inspection
1.CHECK INTAKE AIR TEMPERATURE SENSOR
1. Turn ignition switch OFF.
2. Disconnect mass air flow sensor (bank 1) harness connector.
3. Check resistance between mass air flow sensor (bank 1) terminals as per the following.
Is the inspection result normal?
YES - INSPECTION END
NO - Replace mass air flow sensor (with intake air temperature sensor) (bank 1).
P0128
P0128 THERMOSTAT FUNCTION
