Circuit/System Verification

Engine idling at the normal operating temperature.
Verify the scan tool Transmission Fluid Temperature parameter is between -74 and +174° C (-101 and +345° F).
- If not between -74 and +174° C (-101 and +345° F)
  Replace the Q8 Control Solenoid Valve Assembly.
- If between -74 and +174° C (-101 and +345° F)
Verify the scan tool Transmission Fluid Temperature parameter increases greater than 2° C (3.5° F) after operating the vehicle at 64 km/h (40 mph) for 10 min.
- If the temperature does not increase greater than 2° C (3.6° F)
  Replace the Q8 Control Solenoid Valve Assembly.
- If the temperature increases greater than 2° C (3.6° F)
Verify the scan tool Transmission Fluid Temperature and the TCM Temperature parameters are within 20° C (36° F).
- If the temperatures are not within 20° C (36° F)
1. Ignition OFF, remove the control valve body cover. Refer to Control Valve Body Cover Replacement .
2. Verify the heat sink on the control valve channel upper plate and the control solenoid valve spring are in place and undamaged.
  - If the heat sink on the control valve channel upper plate or the control solenoid valve spring are damaged, replace as necessary
  - If the heat sink on the control valve channel upper plate and the control solenoid valve spring are in place and undamaged, replace the Q8 Control Solenoid Valve Assembly
- If the temperatures are within 20° C (36° F)
Operate the vehicle within the Conditions for Running the DTC. You may also operate the vehicle within the conditions that you observed from the Freeze Frame/Failure Records data.
Verify the DTC does not set.
- If the DTC sets
  Replace the Q8 Control Solenoid Valve Assembly.
- If the DTC does not set
All OK.