2019 Infiniti M35 V6-3.5L (VQ35HR) Diagnostic and Repair Information Page 574
P0729 6GR INCORRECT RATIO
Description
This malfunction is detected when the A/T does not shift into 6GR gear position as instructed by TCM. This is not only caused by electrical
malfunction (circuits open or shorted) but by mechanical malfunction such as control valve sticking, improper solenoid valve operation, etc.
DTC Logic
DTC DETECTION LOGIC
DTC CONFIRMATION PROCEDURE
CAUTION:
- " See: P Code Charts/P0729" must be performed before starting "DTC CONFIRMATION PROCEDURE".
- Never perform "DTC CONFIRMATION PROCEDURE" before completing the repair, which may cause secondary malfunction.
- 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 ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select "ATF TEMP 1" in "Data Monitor" in "TRANSMISSION".
3. Check ATF temperature is in the following range.
ATF TEMP 1 : 20锟斤拷C (68锟斤拷F) - 140锟斤拷C (284锟斤拷F)
With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
Is ATF temperature within specified range?
YES - GO TO 3.
NO - Drive vehicle to warm ATF or stop engine to cool ATF.
3.CHECK SYMPTOM (PART 1)
With CONSULT-III
1. Select "6TH GR FNCTN P0729" in "DTC & SRT confirmation" in "TRANSMISSION".
2. Drive vehicle with manual mode and maintain the following conditions.
GEAR : 6
ACCELE POSI : 0.7/8 or more
VEHICLE SPEED : 10 km/h (7 MPH) or more
3. Keep the current driving status for 2 seconds or more if CONSULT-III screen changes from "OUT OF
CONDITION" to "TESTING".
CAUTION:
When "TESTING" is not indicated on CONSULT-III for a long time, check "Self Diagnostic Results" in "TRANSMISSION". When a
DTC other than "P0729" is detected, check the DTC. See: Diagnostic Trouble Code Descriptions/DTC Index/TCM.
With GST
1. Drive vehicle and maintain the following conditions for 2 seconds or more.
Selector lever : "M" position
Gear position : 6th
Accelerator pedal opening : 0.7/8 or more
Vehicle speed : 10 km/h (7 MPH) or more
