DTC P0657
DTC P0657: Actuator Supply Voltage Circuit/Open
General Description
The transmission control module (TCM) compares the total values of the four pressure regulator commanded current values and the actual current values. If the total value difference of the four pressure regulator between the commanded current values and the actual commanded values is a specified value for a specified duration, the TCM detects a malfunction and stores a DTC.
Monitor Execution, Sequence, Duration, DTC Type
| Execution | Continuous |
| Sequence | None |
| Duration | 1 second or more |
| DTC Type | One drive cycle, MIL on, A/T gear position indicator blinks |
Enable Conditions
| Condition | Minimum | Maximum |
|---|---|---|
| 12 volt battery voltage [Battery Voltage] | 9 V | - |
| Vehicle | ON mode | |
[ ]: HDS Parameter
Malfunction Threshold
Total value difference of the four pressure regulator between the commanded current values and the actual commanded values is more than 200 mA for at least 1 second.
Possible Cause
The causes shown may not be a complete list of all potential problems, and it is possible that there may be other causes.
- TCM +B line open (includes a loose or disconnected connector)
- TCM IG1 line open (includes a loose or disconnected connector)
- TCM VBSOL line open (includes a loose or disconnected connector)
- TCM VBSOL2 line open (includes a loose or disconnected connector)
- TCM GND1 line open (includes a loose or disconnected connector)
- TCM GND2 line open (includes a loose or disconnected connector)
- TCM VBSOL line short to ground
- TCM VBSOL2 line short to ground
- TCM internal failure
Diagnosis Details
Conditions for setting the DTC
When a malfunction is detected, the A/T gear position indicator blinks, the MIL comes on, and a Pending DTC, a Confirmed DTC, and the freeze data are stored in the TCM memory.
Conditions for clearing the DTC
The A/T gear position indicator comes off by turning the vehicle to the OFF (LOCK) mode. The MIL is cleared if the malfunction does not return in three consecutive trips in which the diagnostic runs. The MIL, the Pending DTC, the Confirmed DTC, and the freeze data can be cleared with the scan tool Clear command.