Pinpoint Test A : Transmission Control Solenoids: Notes
WARNING: This page is about a different car, the 2018 Ford F-550 Super Duty, 2018 Ford F-450 Super Duty, 2018 Ford F-350 Super Duty, and 2018 Ford F-250 Super Duty. However, it is still accessible from the selected car via links, so may be relevant.
Refer to Transmission Controls - TorqShift 6 for schematic and connector information.
Normal Operation and Fault Conditions
Power for the solenoids comes from BJB fuse F94. Power is routed through the TSPC (transmission solenoid power control) relay (inside the TCM) to all transmission solenoids. The TCM regulates the current flow through each solenoid circuit. When operating conditions require the solenoid to be electrically off, the TCM reduces current flow in the solenoid circuit to 50mA or less. Some current flow is maintained to monitor circuit performance. When operating conditions require the solenoid to be electrically on, the TCM increases current flow in the solenoid circuit up to 1.0A. By comparing the measured solenoid circuit current to the desired or commanded circuit current, the TCM can determine if the circuit is intact and functioning correctly, open, shorted to ground, or shorted to power. Depending on the type of fault detected, the TCM will usually disable certain gears. For some faults, the TCM will open the TSPC relay. When TSPC relay is open, all solenoids are electrically OFF.
DTC Fault Trigger Conditions
| DTC | Description | Fault Trigger Condition |
|---|---|---|
| TCM P0657:00 | Actuator Supply Voltage "A" Circuit/Open: No Sub Type Information | This DTC sets if the TCM detects an open or short to ground in the TSPC circuitry |
| TCM P0740:00 | Torque Converter Clutch Solenoid Circuit/Open: No Sub Type Information | This DTC sets if the TCM detects an open in the shift solenoid control circuitry. |
| TCM P0742:00 | Torque Converter Clutch Solenoid Circuit Stuck On: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0743:00 | Torque Converter Clutch Solenoid Circuit Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the shift solenoid control to determine a more specific fault. If more specific DTCs such as P0740, P0742 or P0744 are set resolve them first. |
| TCM P0744:00 | Torque Converter Clutch Solenoid Circuit Intermittent: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P0748:00 | Pressure Control Solenoid "A" Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the shift solenoid control to determine a more specific fault. If more specific DTCs such as P0960, P0962 or P0963 are set resolve them first. |
| TCM P0750:00 | Shift Solenoid "A": No Sub Type Information | This DTC sets if the TCM detects an open or short to ground in the shift solenoid control circuitry. |
| TCM P0753:00 | Shift Solenoid "A" Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0750, P0973 or P0974 are set resolve them first. |
| TCM P0755:00 | Shift Solenoid "B": No Sub Type Information | This DTC sets if the TCM detects an open in the shift solenoid control circuitry. |
| TCM P0758:00 | Shift Solenoid "B" Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0755, P0976 or P0977 are set resolve them first. |
| TCM P0759:00 | Shift Solenoid "B" Intermittent: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0755, P0976 or P0977 are set resolve them first. |
| TCM P0760:00 | Shift Solenoid "C": No Sub Type Information | This DTC sets if the TCM detects an open in the shift solenoid control circuitry. |
| TCM P0763:00 | Shift Solenoid "C" Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0760, P0979 or P0980 are set resolve them first. |
| TCM P0764:00 | Shift Solenoid "C" Intermittent: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0760, P0979 or P0980 are set resolve them first. |
| TCM P0765:00 | Shift Solenoid "D": No Sub Type Information | This DTC sets if the TCM detects an open in the shift solenoid control circuitry. |
| TCM P0768:00 | Shift Solenoid "D" Electrical: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0765, P0982 or P0983 are set resolve them first. |
| TCM P0769:00 | Shift Solenoid "D" Intermittent: No Sub Type Information | This DTC sets if the fault was not present long enough for the TCM to determine a more specific fault. If a more specific DTCs such as P0765, P0982 or P0983 are set resolve them first. |
| TCM P0770:00 | Shift Solenoid "E": No Sub Type Information | This DTC sets if the TCM detects an open, short to ground or short to power in the shift solenoid control circuitry. |
| TCM P0774:00 | Shift Solenoid "E" Intermittent: No Sub Type Information | This DTC sets if the TCM detects an intermittent open, short to power or short to ground in the shift solenoid control circuitry. If DTC P0770 is set resolve it first. |
| TCM P0960:00 | Pressure Control Solenoid "A" Control Circuit/Open: No Sub Type Information | This DTC sets if the TCM detects an open in the shift solenoid control circuitry. |
| TCM P0961:00 | Pressure Control Solenoid "A" Control Circuit Range/Performance: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0962:00 | Pressure Control Solenoid "A" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0963:00 | Shift Solenoid "A" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P0973:00 | Shift Solenoid "A" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0974:00 | Shift Solenoid "A" Control Circuit High: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P0976:00 | Shift Solenoid "B" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0977:00 | Shift Solenoid "B" Control Circuit High: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P0979:00 | Shift Solenoid "C" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0980:00 | Shift Solenoid "C" Control Circuit High: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P0982:00 | Shift Solenoid "D" Control Circuit Low: No Sub Type Information | This DTC sets if the TCM detects a short to ground in the shift solenoid control circuitry. |
| TCM P0983:00 | Shift Solenoid "D" Control Circuit High: No Sub Type Information | This DTC sets if the TCM detects a short to power in the shift solenoid control circuitry. |
| TCM P2669:00 | Actuator Supply Voltage "B" Circuit/Open: No Sub Type Information | This DTC sets if the TCM detects an open or short to ground in the TSPC circuitry. The "B" actuator supplies voltage to specific solenoids, see wiring diagram for details. |
| TCM P2760:00 | Torque Converter Clutch Pressure Control Solenoid Intermittent: No Sub Type Information | This DTC sets if the TCM detects an intermittent short to ground in the shift solenoid control circuitry. If DTC P0742 is set resolve it first. |
Possible Sources
- Connectors damaged or pushed-out terminals, corrosion, loose wires and missing or damaged seals
- Shift solenoid
- TCM