P0733

DTC P0733 A/T 3RD GEAR FUNCTION

Description
This malfunction is detected when the A/T does not shift into 3rd 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.

On Board Diagnosis Logic
^ This is an OBD-II self-diagnostic item.
^ Diagnostic trouble code "P0733 A/T 3RD GR FNCTN" with CONSULT-III or 20th judgment flicker without CONSULT-III is detected when TCM detects any inconsistency in the actual gear ratio.

Possible Cause
^ Input clutch solenoid valve
^ Front brake solenoid valve
^ Direct clutch solenoid valve
^ High and low reverse clutch solenoid valve
^ Each clutch
^ Hydraulic control circuit

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.

WITH CONSULT-III
1. Start the engine and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Make sure that "ATF TEMP 1" is within the following range.
ATF TEMP 1: 20 degreesC (68 degreesF) - 140 degreesC (284 degreesF)
If out of range, drive vehicle to warm ATF or stop engine to cool ATF.
3. Select "3RD GR FNCTN P0733" of "DTC WORK SUPPORT" mode for "TRANSMISSION" with CONSULT-III.
4. Drive vehicle and maintain the following conditions.
MANU MODE SW: ON
GEAR: "3" position
ACCELE POSI: 0.6/8 or more
VEHICLE SPEED: 10 km/h (6 MPH) or more
ENGINE SPEED: TURBINE REV - 50 rpm or more
TURBINE REV: 300 rpm or more
5. 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 "P0733" is shown, refer to "AT-85, "CONSULT-III Function (TRANSMISSION)"". Consult-III Function (Transmission)

If "COMPLETED RESULT NG" is detected, go to "Diagnosis Procedure".
If "STOP VEHICLE" is detected, go to the following step.
6. Stop vehicle.
7. Drive vehicle in "D" position allowing it to shift from 1st to 5th gear and check shift timing and shift shock.
- Touch "OK" to complete the inspection when normally shifted from the 1st to 5th gear.
- Touch "NG" when an unusual shift shock, etc. occurs in spite of shifting from the 1st to 5th gear. Go to AT-54, "Road Test". Road Test
- Perform AT-85, "CONSULT-III Function (TRANSMISSION)" when not shifted from the 1st to 5th gear. Consult-III Function (Transmission)
(Neither "OK" nor "NG" are indicated.)

WITH GST
1. Start the engine.
2. Drive vehicle for approximately 5 minutes in urban areas.
3. Drive vehicle and maintain the following conditions for at least 5 consecutive seconds.
Manual mode switch: ON
Gear position: "3" position
Accelerator opening: 0.6/8 or more
Vehicle speed: 10 km/h (6 MPH) or more
4. Check DTC. If DTC is detected, go to "Diagnosis Procedure".

Diagnosis Procedure

1.CHECK CAN COMMUNICATION LINE

With CONSULT-III
^ Select "SELF-DIAG RESULTS" mode for "TRANSMISSION" with CONSULT-III.

Without CONSULT-III
^ Perform the self-diagnosis. Refer to AT-92, "Diagnosis Procedure without CONSULT-III". Diagnosis Procedure Without Consult-III

Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT-97. U1000
NO >> GO TO 2.

2.CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-162. Main Power Supply and Ground Circuit
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3.DETECT MALFUNCTION ITEM
Check A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.

4.REPLACE CONTROL VALVE WITH TCM
1. Replace control valve with TCM.
2. Perform "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> Confirm malfunction phenomena by "ROAD TEST" to repair malfunctioning part. Refer to AT-54, "Road Test". Road Test