Circuit/System Testing

WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.

Perform the Line Pressure Check .
- If the pressure is out of specification correct that concern first.
Perform the Control Solenoid Valve and Transmission Control Module Assembly Cleaning and retest the DTC as outlined in the Circuit/System Verification steps.
- If the DTC resets, continue with testing.
Perform the Control Solenoid Valve and Transmission Control Module Assembly Inspection .
- If a concern is found, repair or replace the control solenoid (w/body and TCM) valve assembly.
Perform the Control Solenoid Valve and Transmission Control Module Assembly Solenoid Performance Test .
- If the shift solenoid 1 is found to be leaking or stuck OFF, replace the control solenoid (w/body and TCM) valve assembly.
- If the control solenoid (w/body and TCM) valve assembly shift solenoid functions correctly, inspect the lower control valve body assembly for the following:

Clutch select solenoid valve and valve body bore for scratches, gouges, scuffing, scoring, and sediment.
The valve should move freely in the bore without stopping or binding.
Inspect clutch select valve 2 (CSV2) fluid circuits for blockage.
Inspect the clutch select valve spring for damage, distortions, or broken coils.