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Toyota Corolla Repair Manual: Shift solenoid a performance (shift solenoid valve s1)

Toyota Corolla Repair Manual / Diagnostics / Electronic controlled automatic transaxle / Shift solenoid a performance (shift solenoid valve s1)

Dtc p0751 shift solenoid a performance (shift solenoid valve s1)

System description

The ecm uses signals from the vehicle speed sensor and crankshaft position sensor to detect the actual gear position (1st, 2nd, 3rd or o/d gear).

Then the ecm compares the actual gear with the shift schedule in the ecm memory to detect the mechanical trouble of the shift solenoid valves, the valve body or automatic transaxle (clutch, brake or gear etc.).

Monitor description

Monitor description

The ecm commands gear shifts by turning the shift solenoid valves on/off. According to the input shaft revolution, intermediate (counter) shaft revolution and output shaft revolution, the ecm detects the actual gear position (1st, 2nd, 3rd or o/d gear position). When the gear position commanded by the ecm and the actual gear position are not same, the ecm illuminates the mil.

Monitor strategy

Typical enabling conditions

Typical enabling conditions

Typical malfunction thresholds

Typical malfunction thresholds

Inspection procedure

Inspection procedure
1 Inspect shift solenoid valve(sl) Remove the shift solenoid valve sl.  measure the resistance according to the value(s) in the table below. Standard: Connect the positive (+ ...

Inspection procedure
1 Inspect shift solenoid valve(s1) Remove the shift solenoid valve s1. measure the resistance according to the value(s) in the table below. Standard: Connect the positive (+) batt ...

Other materials:

Overhaul
1. Remove repair service starter kit Remove the nut, then disconnect the lead wire from terminal c. Remove the 2 screws which are used to secure the repair service starter kit to the starter drive housing.  remove the repair service starter kit.  remove the return ...

Replacement
Hint: components: 1. Precaution 2. Disconnect battery negative terminal 3. Remove horn button assy Place the front wheels facing straight ahead.  using a torx socket wrench (t30), loosen the 2 torx screws until the groove along the screw circumference catches on the screw ca ...

System description
The ecm uses the signals from the throttle position sensor, airflow meter and crankshaft position sensor to monitor the engagement condition of the lockup clutch. Then the ecm compares the engagement condition of the lockup clutch with the lockup schedule in the ecm memory to detect mec ...

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