Solenoid Testing Procedure
WARNING: This page is about a different car, the 2019 Chevrolet Malibu. However, it is still accessible from the selected car via links, so may be relevant.
Control Solenoid Valve
| Callout | Component Name | Normal Resistance | Terminal | DTC/Symptom |
|---|---|---|---|---|
| 1 | Transmission Fluid Temperature Sensor | Temperature Versus Resistance (Transmission Fluid Temperature Sensor) | X1 Terminal 3, X1 Terminal 4 | P0711, P0712, or P0713 |
| 2 | Pressure Control Solenoid Valve 4 | 23 - 24 Ω | X1 Terminal 6, X1 Terminal 7 | P2718, P2720, or P2721 |
| 3 | Pressure Control Solenoid Valve 3 | 23 - 24 Ω | X1 Terminal 8, X1 Terminal 7 | P0968, P0970, or P0971 |
| 4 | Electrical Connector - 8 Pins | - | - | - |
| 5 | Pressure Control Solenoid Valve 2 | 23 - 24 Ω | X1 Terminal 2, X1 Terminal 1 | P0964, P0966, or P0967 |
| 6 | Pressure Control Solenoid Valve 5 | 23 - 24 Ω | X1 Terminal 5, X1 Terminal 7 | P2727, P2729, or P2730 |
DTC P0711, P0712, or P0713
- Measure the transmission fluid temperature sensor resistance between X1 Terminal 3 and X1 Terminal 4, refer to Temperature Versus Resistance (Transmission Fluid Temperature Sensor) .
- If the resistance is not within the specified range
Replace the Q8 Control Solenoid Valve Assembly.
- Go to next step: If the resistance is within the specified range
- If the resistance is not within the specified range
- Test the transmission internal harness for an open, short to ground, or short to voltage. If the transmission internal harness tests OK, replace the T6 Power Inverter Module.
DTC P079A, P079B, P079C, P07A3, P07A5, P179C, P179D
- Measure each pressure control solenoid valve for 23 - 24 Ω.
- If the resistance is not within the specified range
Replace the Q8 Control Solenoid Valve Assembly.
- Go to next step: If the resistance is within the specified range
- If the resistance is not within the specified range
- With a rubber tipped blow gun, pressurize the line pressure side of each solenoid fluid passage of the Q8 control solenoid valve assembly. When the solenoid is not energized, air should not leak out of the exhaust port.
- One at a time, energize each solenoid with a 12 V source. With a rubber tipped blow gun, pressurize the line pressure side of each solenoid fluid passage of the Q8 control solenoid valve assembly. When the solenoid is energized, air should leak out of the exhaust port.
- If the Q8 control solenoid valve assembly fails any of the above tests
Replace the Q8 Control Solenoid Valve Assembly.
- Go to next step: If the Q8 control solenoid valve assembly passes the above tests
Go to next step: The concern is internal to the transmission.
- If the Q8 control solenoid valve assembly fails any of the above tests
- Repair as necessary.
NOTE:
Solenoid valves 3, 4 and 5 share a 12V supply input at terminal 7 while solenoid valve 2 has a dedicated 12V supply at terminal 1.
NOTE:
The line pressure ports are shared between solenoids. Remove the filter screen plate.