P0756

DTC P0756 Shift Solenoid B Performance (Shift Solenoid Valve S2)

DESCRIPTION





The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th or 5th gear). Then the ECM compares the actual gear with the shift schedule in the ECM memory to detect mechanical problems of the shift solenoid valves, valve body or automatic transmission (clutch, brake or gear, etc.).

MONITOR DESCRIPTION
This DTC indicates a stuck ON malfunction or stuck OFF malfunction of the shift solenoid valve S2. The ECM commands gear shifts by turning the shift solenoid valves ON/OFF. When the gear position commanded by the ECM and the actual gear position are not the same, the ECM illuminates the MIL and stores the DTC.

Monitor Strategy:

Typical Enabling Conditions - Part 1:

Typical Enabling Conditions - Part 2:

Typical Malfunction Thresholds





HINT: Performing the intelligent tester's ACTIVE TEST allows relay, VSV, actuator and other items to be operated without removing any parts. Performing the ACTIVE TEST early in troubleshooting is one way to save time. The DATA LIST can be displayed during the ACTIVE TEST

1. Warm up the engine.
2. Turn the ignition switch OFF.
3. Connect the intelligent tester to the CAN VIM. Then connect the CAN VIM to the DLC3.
4. Turn the ignition switch ON.
5. Turn the intelligent tester ON.
6. Enter the following menus: DIAGNOSIS / ENHANCED OBD II / ACTIVE TEST
7. Follow the instructions on the tester and read the ACTIVE TEST





HINT: While driving, the shift position can be forcibly changed with the intelligent tester. Comparing the shift position commanded by the ACTIVE TEST with the actual shift position enables you to confirm the problem.





HINT:
^ This test can be conducted when the vehicle speed is 50 km/h (31 mph) or less. The 4th to 5th up-shift must be performed with the accelerator pedal released.
^ The 5th to 4th down-shift must be performed with the accelerator pedal released. Do not operate the accelerator pedal for at least 2 seconds after shifting and do not shift successively
^ The shift position commanded by the ECM is shown in the DATA LIST (shift status) display on the intelligent tester.
^ The shift solenoid valve S2 is turned ON/OFF normally when the shift lever is on D:

INSPECTION PROCEDURES

Step 1:

Steps 2-3: