P0731
P0731 A/T 1ST GEAR FUNCTIONDescription
This malfunction is detected when the A/T does not shift into 1st gear position as instructed by TCM. This is not only caused by electrical malfunction (circuits open or shorted) but also by mechanical malfunction such as control valve sticking, improper solenoid valve operation.
DTC Logic
DTC DETECTION LOGIC
P0731:
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 and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
1. CHECK ATF TEMPERATURE
With CONSULT-III
1. Start the engine.
2. Select "DATA MONITOR".
3. Check ATF temperature is in the following range.
ATF TEMP 1: 20°C - 140°C
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 "1ST GR FNCTN P0731" of "DTC WORK SUPPORT".
2. Drive vehicle and maintain the following conditions.
VEHICLE SPEED: 10 km/h (6 MPH) or more
ACCELE POSI: 0.6/8 or more
ENGINE SPEED: TURBINE REV - 50 rpm or more
TURBINE REV: 300 rpm or more
GEAR: "1" position
Manual mode: ON
3. Keep the current driving status for at least 5 consecutive seconds if CONSULT-III screen changes from "OUT OF CONDITION" to "TESTING".
CAUTION: If "TESTING" does not appear on CONSULT-III for a long time, select "SELF-DIAG RESULTS". In case a 1st trip DTC other than P0731 is shown, refer to applicable "TROUBLE DIAGNOSIS FOR DTC".
Is "STOP VEHICLE" or "COMPLETED RESULT NG" displayed?
"STOP VEHICLE" >> GO TO 3.
"COMPLETED RESULT NG" >> Go to "Diagnosis Procedure".
3. CHECK SYMPTOM 2
With CONSULT-III
1. Stop vehicle.
2. Drive vehicle in "D" position allowing it to shift from 1st to 5th gear and check shift timing and shift shock.
Is the inspection result normal?
YES >> Check Intermittent incident. Refer to "Intermittent Incident". Testing and Inspection
NO >> Go to "Diagnosis Procedure".
Diagnosis Procedure
1. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to "Diagnosis Procedure".
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.
2. Perform "DTC CONFIRMATION PROCEDURE". Refer to "DTC Logic".
Is the inspection result normal?
YES >> INSPECTION END
NO >> Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. Refer to "Description". Road Test