P074B

P074B UNABLE TO ENGAGE 3GR

Description

This malfunction is detected when the A/T does not shift into 3GR 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. PREPARATION BEFORE WORK

If another "DTC CONFIRMATION PROCEDURE" occurs just before, turn ignition switch OFF and wait for at least 10 seconds, then perform the next test.
- GO TO 2.

2. CHECK DTC DETECTION

With CONSULT
1.Select "3RD GR FNCTN P0733" in "DTC & SRT confirmation" in "TRANSMISSION".
NOTE:
"3RD GR FNCTN P0731" can be used in this diagnosis.
2.Drive vehicle according to 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 "P074B" 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 the first trip DTC.
Is "OUT OF CONDITION", "STOP VEHICLE", or "COMPLETED RESULT NG" displayed? / Is "P074B"
detected?
YES-1 (OUT OF CONDITION.)-Perform "step 2" again.
YES-2 (STOP VEHICLE.)-GO TO 3.
YES-3 (COMPLETED RESULT NG)-Go to "Diagnosis Procedure" .
YES-4 ("P074B" is detected.)-Go to "Diagnosis Procedure" .
NO- GO TO 3.

3. CHECK SYMPTOM

1.Stop the vehicle.
2.Drive vehicle in "D" position allowing it to shift from 1GR to 4GR and check shift timing and shift shock.
- INSPECTION END


Diagnosis Procedure


1. MALFUNCTION CAUSE SIMULATION TEST

Refer to "Intermittent Incident" Intermittent Incident.
Is the check result normal?
YES - Replace the transaxle assembly. Refer to "Removal and Installation" Removal and Replacement.
NO- Repair or replace the malfunctioning parts.