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 park/neutral position (PNP) switch, vehicle speed and ECM (throttle opening). Gears will then be shifted to the optimum position.

On Board Diagnosis Logic
Diagnostic trouble code SFT SOL A/CIRC with CONSULT-II or P0750 without CONSULT-II is detected when TCM detects an improper voltage drop when it tries to operate the solenoid valve.

Possible Cause
Check the following items.
- Harness or connectors (The solenoid circuit is open or shorted.)
- Shift solenoid valve A

Diagnostic Trouble Code (DTC) Confirmation Procedure

CAUTION: Always drive vehicle at a safe speed.

NOTE: If DTC Confirmation Procedure has been previously conducted, always turn ignition switch OFF and wait at least 10 seconds before conducting the next test.

After the repair, perform the following procedure to confirm the malfunction is eliminated.

WITH CONSULT-II





1. Turn ignition switch ON and select DATA MONITOR mode for ENGINE with CONSULT-II.





2. Start engine.
3. Drive vehicle in D position and allow the transmission to shift 1 -> 2 (GEAR).

WITH GST
Follow the procedure With CONSULT-II.

Wiring Diagram-AT-SSV/A

AT-SSV/A-01:

AT-SSV/A-01





TCM TERMINAL AND REFERENCE VALUE MEASURED BETWEEN EACH TERMINAL AND 25 OR 48 (TCM GROUND)

Diagnostic Procedure
1. CHECK VALVE RESISTANCE
1. Turn ignition switch to OFF position.
2. Disconnect terminal cord assembly connector in engine compartment.





3. Check resistance between terminal cord assembly connector F30 terminal and ground
OK or NG
OK >> GO TO 3.
NG >> GO TO 2.

2. CHECK VALVE OPERATION
1. Remove control valve assembly.
2. Check the following items:
- Shift solenoid valve A
- Operation check





- Check solenoid valve by listening for its operating sound while applying battery voltage and ground to the solenoid.
- Harness of terminal cord assembly for short or open
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.

3. CHECK POWER SOURCE CIRCUIT
1. Turn ignition switch to OFF position.
2. Disconnect TCM harness connector.
3. Check continuity between terminal cord assembly harness connector F30 terminal 2 and TCM harness connector F56 terminal 11. Refer to Wiring Diagram-AT-SSV/A.
Continuity should exist.
4. 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 DTC
Perform AT-549, Diagnostic Trouble Code (DTC) Confirmation Procedure.
OK or NG
OK >> INSPECTION END
NG >> GO TO 5.

5. CHECK TCM INSPECTION
1. Perform TCM input/output signal inspection. 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.