P0734

P0734 4GR INCORRECT RATIO





Description
This malfunction is detected when the A/T does not shift into 4GR 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 DETECTION LOGIC:

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. Then wait at least 10 seconds before performing the next test.
1.CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select "Data Monitor" in "TRANSMISSION".
3. Check ATF temperature is in the following range.

ATF TEMP 1 : 20�C (68�F) - 140�C (284�F)

With GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas, GO TO 2.
Is ATF temperature within specified range?
YES - GO TO 2.
NO - Drive vehicle to warm ATF or stop engine to cool ATF.
2.CHECK SYMPTOM 1
With CONSULT-III
1. Select "DTC and SRT confirmation" in "TRANSMISSION".
2. Select "4TH GR FNCTN P0734".
3. Drive vehicle and maintain the following conditions.

MANU MODE SW : ON
GEAR : "4" position
ACCELE POSI : 0.6/8 or more
VEHICLE SPEED : 10 km/h (6 MPH) or more
ENGINE SPEED : INPUT SPEED - 50 rpm or more
INPUT SPEED : 300 rpm or more

4. Keep the current driving status for at least 5 consecutive seconds 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" mode for "TRANSMISSION". When a DTC other than "P0734" is detected, check the DTC. Refer to Testing and Inspection.
With GST
1. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.

Manual mode switch : ON
Gear position : "4" position
Accelerator opening : 0.6/8 or more
Vehicle speed : 10 km/h (6 MPH) or more

2. Check DTC.
Is "STOP VEHICLE" or "COMPLETED RESULT NG" displayed? / Is "P0734" detected?
YES-1 - "STOP VEHICLE": GO TO 3.
YES-2 - "COMPLETED RESULT NG": Go to P0734.
YES-3 - "P0734" is detected: Go to P0734.
NO - Check intermittent incident. Refer to Intermittent Incident.
3.CHECK SYMPTOM 2
With CONSULT-III
1. Stop vehicle.
2. Drive vehicle in "D" position allowing it to shift from 1GR to 5GR and check shift timing and shift shock.
Is the inspection result normal?
YES - Check intermittent incident. Refer to Intermittent Incident.
NO - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. Refer to Description.




Diagnosis Procedure
1.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to Main Power Supply and Ground Circuit.
Is the inspection result normal?
YES - GO TO 2.
NO - Repair or replace damaged parts.
2.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM. Refer to Exploded View.
2. Perform "DTC CONFIRMATION PROCEDURE". Refer to P0734.
Is the inspection result normal?
YES - INSPECTION END
NO - Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. Refer to Description.