DTC P0766 Shift Solenoid "D" Performance (Shift Solenoid Valve S4); DTC P0776 Pressure Control Solenoid "B" Performance (Shift Solenoid Valve SL2): Description
WARNING: This page is about a different variant/trim than selected.
The ECM uses signals from the output shaft speed sensor and input speed sensor to detect the actual gear position (1st, 2nd, 3rd, 4th, 5th or 6th 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.).
DTC DETECTION CONDITION CHART
| DTC No. | DTC Detection Condition | Trouble Area |
|---|---|---|
| P0766 | S4 stuck OFF malfunction or brake control valve malfunction*: Shifting to 5th and 6th gears is impossible. The ECM determines there is a malfunction when the following conditions are both met.(2-trip detection logic)
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| P0776 | SL2 stuck ON malfunction or brake control valve malfunction*: Shifting to 5th and 6th gears is impossible. The ECM determines there is a malfunction when the following conditions are both met.(2-trip detection logic)
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HINT:
- Gear positions in the event of a solenoid valve mechanical problem:ECM COMMAND GEARSHIFT CHART
ECM command gearshift 1st 2nd 3rd 4th 5th 6th *: Actual gear position under malfunction 1st 2nd 3rd 4th 4th 4th - Gear position during fail-safe operation:
If any malfunction is detected, the ECM changes into the fail-safe mode to shift into the gear positions as shown in the table below.
GEAR POSITION CHARTGear position under normal conditions 1st 2nd 3rd 4th 5th 6th *: Actual gear position under fail-safe mode 1st 2nd 3rd 3rd 3rd 3rd