• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Clutch PC Solenoid 3 Control | P0970 | P0971 | P0971 | P0969 |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
PC 3 Sol. CKT Status | OK | Open/Short to Volts | Short to GND | Open/Short to Volts |
The clutch pressure control (PC) solenoid 3 is part of the control solenoid (w/body and TCM) valve assembly and is not serviced separately. The transmission control module (TCM) supplies 12 volts to the clutch PC solenoid 3 on the high side driver 1 circuit. The TCM controls the PC solenoid 3 through the clutch PC solenoid 3 control circuit. The normally high clutch PC solenoid 3 controls fluid to the hybrid low, 1-2 and the 4th clutch assemblies when commanded ON and exhausts fluid when commanded OFF. The clutch PC solenoid 3 regulates the transmission fluid pressure to the hybrid low, 1-2 and the 4th clutch assemblies.
• | The engine run time is greater than 5 seconds. |
• | The vehicle speed is less than 200 km/h (124 mph) for 5 seconds. |
• | The system voltage is 11-18 volts. |
The TCM detects an internal electrical performance malfunction of the clutch PC solenoid control circuit when the actual hybrid low, 1-2 and the 4th clutch pressure does not equal the commanded hybrid low, 1-2 and 4th clutch pressure for 300 milliseconds.
The TCM detects an internal low voltage electrical malfunction of the clutch PC solenoid control circuit for 500 milliseconds.
The TCM detects an internal high voltage electrical malfunction of the clutch PC solenoid control circuit for 500 milliseconds.
• | DTC P0969 is a Type B DTC. |
• | DTCs P0970 and P0971 are Type A DTCs. |
• | The TCM defaults the transmission to a limited shift pattern utilizing 2 forward gears and reverse based on the default detected. |
• | The TCM commands maximum line pressure. |
• | The TCM freezes transmission adaptive functions. |
• | DTC P0969 is a Type B DTC. |
• | DTCs P0970 and P0971 are Type A DTCs. |
When attempting to set solenoid electrical DTCs, ensure the TCM is warmed up and the transmission is operated long enough to ensure a 3°C (5°F) increase in TCM substrate temperature. This will place the TCM under the optimal conditions to test solenoid electrical DTCs.
Automatic Transmission Controls Schematics
Powertrain Diagnostic Trouble Code (DTC) Type Definitions
Perform the following procedure to place the control solenoid (w/body and TCM) valve assembly under the optimal conditions to test solenoid electrical DTCs.
⇒ | If the DTC resets, go to Circuit/System Testing. |
The scan tool data parameter Clutch PC 3 Sol. CKT Status normally displays OK.
⇒ | If the parameter displays Open/Short to Volts, Short to GND, or if the DTC resets, perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection . |
⇒ | If no concerns are found, replace the control solenoid (w/body and TCM) valve assembly. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.
Control Module References for control solenoid (w/body and TCM) valve assembly replacement, setup, and programming.