Solenoid Application Chart: Notes
| GEAR | UD | OD | REV | 2/4 | LR |
|---|---|---|---|---|---|
| PARK | X | ||||
| REVERSE | X | X | |||
| NEUTRAL | X | ||||
| 1ST | X | X | |||
| 2ND | X | X | |||
| 3RD | X | X | |||
| 4TH | X | X |
Theory of operation: Four solenoids are used to control the friction elements (clutches). The continuity of the solenoids circuits are periodically tested. Each solenoid is turned on or off depending on it's current state. An inductive spike should be detected by the TCM during this test. If no spike is detected, the circuit is tested again to verify the failure. In addition to the periodic testing, the solenoid circuits are tested if a gear ratio or pressure switch error occurs. In this case, one failure will result in the appropriate code being set.
Transmission Effects: The MIL will illuminate and the transmission goes into neutral if code is set above 35 Km/h (22 MPH), Limp-in mode when vehicle speed is below 35 Km/h (22 MPH).
Possible causes:
- Open or shorted solenoid circuit(s) between TCM and solenoid pack.
- Open ground circuit.
- TCM connector problems.
- Solenoid pack connector problem.
- Solenoid Pack.
- TCM
Name of code: P1776(47) - Solenoid Switch Valve Latched in LR Position