P0731

P0731 1GR INCORRECT RATIO

Description

This malfunction is detected when the A/T does not shift into 1GR 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:
- " "Diagnosis Procedure" " 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
1.Start the engine.
2.Select "ATF TEMP 1" in "Data Monitor" in "TRANSMISSION".
3.Check ATF temperature is in the following range.





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
1.Select "1ST GR FNCTN P0731" in "DTC & SRT confirmation" in "TRANSMISSION".
2.Drive vehicle with manual mode and maintain the following conditions.





3.Keep the current driving status for 2 seconds or more if CONSULT screen changes from "OUT OF CONDITION" to "TESTING".

CAUTION:
When "TESTING" is not indicated on CONSULT for a long time, check "Self Diagnostic Results" in
"TRANSMISSION". When a DTC other than "P0731" is detected, check the DTC. Refer to "DTC Index" Testing and Inspection.
With GST
1.Drive vehicle and maintain the following conditions for 2 seconds or more.





2.Check DTC.
Is "OUT OF CONDITION", "STOP VEHICLE" or "COMPLETED RESULT NG" displayed? / Is "P0731"
detected?
YES-1 (OUT OF CONDITION)-Perform "Step 3" again.
YES-2 (STOP VEHICLE)-GO TO 4.
YES-3 (COMPLETED RESULT NG)-Go to "Diagnosis Procedure" .
YES-4 ("P0731" is detected)-Go to "Diagnosis Procedure" .
NO- GO TO 4.

4. CHECK SYMPTOM (PART 2)

1.Stop vehicle.
2.Drive vehicle in "D" position allowing it to shift from 1GR to 7GR and check shift timing and shift shock.
- INSPECTION END


Diagnosis Procedure


1. CHECK INTERMITTENT INCIDENT

Refer to "Intermittent Incident" Intermittent Incident.
Is the inspection result normal?
YES- GO TO 2.
NO- Repair or replace damaged parts.

2. DETECT MALFUNCTIONING ITEM

Disassemble the A/T assembly to check component parts. Refer to "Disassembly" Disassembly.
NOTE:
Check the component parts, referring to "Possible cause" in "DTC DETECTION LOGIC". Refer to "DTC Logic" .
Is the inspection result normal?
YES- Replace control valve & TCM. Refer to "Removal and Installation" Removal and Installation.
NO- Repair or replace damaged parts.