P0750

DTC P0750 SHIFT SOLENOID VALVE A





Description
Shift solenoid valves A and B are turned ON or OFF by the TCM in response to signals sent from the PNP switch, vehicle speed and ECM (throttle opening). Gears will then be shifted to the optimum position.









CONSULT-III Reference Value in Data Monitor Mode









On Board Diagnosis Logic
- This is an OBD-II self-diagnostic item.
- Diagnostic trouble code "P0750 SHIFT SOLENOID/V A" with CONSULT-III or 4th judgement flicker without CONSULT-III is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.




Possible Cause
- Harness or connector
(The solenoid circuit is open or shorted.)
- Shift solenoid valve A




DTC Confirmation Procedure

CAUTION:
- Always drive vehicle at a safe speed.
- If performing this "DTC Confirmation Procedure" again, always turn ignition switch OFF and wait at least 10 seconds before continuing.
After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-III
1. Turn ignition switch ON and select "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
2. Touch "START".
3. Start engine.
4. Drive vehicle in "D" position and allow the transaxle to shift 1 to 2 ("GEAR").
5. If the check result is NG, go to "Diagnosis Procedure".

WITH GST
Follow the procedure "WITH CONSULT-III".

WITHOUT CONSULT-III
1. Start engine.
2. Drive vehicle in D1 to D2 position.
3. Perform self-diagnosis. Refer to Diagnosis Procedure Without CONSULT-III .
4. If the check result is NG, go to "Diagnosis Procedure".




Wiring Diagram - AT - SSV/A






TCM TERMINALS AND REFERENCE VALUES
Refer to Pinout Values and Diagnostic Parameters.




Diagnosis Procedure
1.CHECK INPUT SIGNAL
With CONSULT-III
1. Start engine.
2. Select "MAIN SIGNALS" in "DATA MONITOR" mode for "TRANSMISSION" with CONSULT-III.
3. Read out the value of "SHIFT S/V A" while driving.
Check the value changes according to driving speed.





Without CONSULT-III
1. Start engine.





2. Check voltage between TCM connector terminal and ground.





OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2.CHECK SHIFT SOLENOID VALVE A CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect TCM connector.





3. Check resistance between TCM connector terminal and ground.





OK or NG
OK >> GO TO 5.
NG >> GO TO 3.
3. CHECK HARNESS BETWEEN TCM AND TERMINAL CORD ASSEMBLY HARNESS CONNECTOR
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly harness connector and TCM connector.





3. Check continuity between terminal cord assembly harness connector terminal and TCM connector terminal.





4. If OK, check harness for short to ground and short to power.
5. If OK, check continuity between ground and transaxle assembly.
6. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Repair open circuit or short to ground or short to power in harness or connectors.
4.CHECK VALVE RESISTANCE
1. Turn ignition switch OFF.
2. Disconnect terminal cord assembly connector in engine room.





3. Check resistance between terminal cord assembly harness connector terminal and ground.





OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5.CHECK DTC
Perform "DTC Confirmation Procedure".
OK or NG
OK >> INSPECTION END
NG >> GO TO 6.
6.CHECK TCM
1. Check TCM input/output signal. Refer to Pinout Values and Diagnostic Parameters .
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> INSPECTION END
NG >> Repair or replace damaged parts.




Component Inspection

SHIFT SOLENOID VALVE A
- For removal, refer to Service and Repair .

Resistance Check
- Check resistance between terminal and ground.











Operation Check





- Check solenoid valve by listening for its operating sound while applying battery voltage to the terminal and ground.