Circuit/System Testing
WARNING: This page is about a different car, the 2009 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- Perform the Transmission Fluid Check
.
- If the level is not within specifications, repair as necessary.
- Perform the Line Pressure Check
.
- If the pressures are not within specifications, inspect and repair the following components:
- Oil filter and seal missing, plugged, or damaged
- Spacer plate and gasket damaged or not assembled correctly
- PC solenoid valve damaged or contaminated
- Pressure regulator valve line-up binding or damaged
- Torque signal valve line-up binding or damaged
- Oil pump assembly damaged or missing components
- If the pressures are not within specifications, inspect and repair the following components:
- Verify the scan tool 1-2 Shift Time parameter is less than 0.65 seconds.
- If the shift time is greater than 0.65 seconds, inspect and repair the following components:
- 1-2 accumulator piston seals rolled or damaged
- 1-2 accumulator piston and pin missing, binding, or damaged
- Forward servo assembly damaged or not assembled correctly
- Oil pump assembly damaged or missing components
- Spacer plate and gaskets damaged or not assembled correctly
- Driven sprocket support seals damaged or missing
- Second clutch piston and seal assembly binding or damaged
- Second clutch fiber and steel plates not assembled correctly, burned, or damaged
- Second clutch spring assembly damaged or not assembled correctly
- Forward band burned, damaged, or not assembled correctly
- 1-2 support roller clutch assembly damaged or not assembled correctly
- If the shift time is greater than 0.65 seconds, inspect and repair the following components:
- Verify the scan tool 2-3 Shift Time parameter is less than 0.65 seconds.
- If the 2-3 shift time is greater than 0.65 seconds, inspect and repair the following components:
- 2-3 accumulator piston seals rolled or damaged
- 2-3 accumulator piston and pin missing, binding, or damaged
- Oil pump assembly damaged or missing components
- Spacer plate and gaskets damaged or not assembled correctly
- Driven sprocket support seals damaged or missing
- Third clutch piston seal rolled or damaged
- Third clutch piston damaged or not assembled correctly
- Third clutch fiber and steel plates not assembled correctly, burned, or damaged
- Third clutch spring assembly damaged or not assembled correctly
- Third sprag clutch assembly damaged or not assembled correctly
- If the 2-3 shift time is greater than 0.65 seconds, inspect and repair the following components:
- Verify the scan tool 3-4 Shift Time parameter is less than 0.65 seconds.
- If the 3-4 shift time is greater than 0.65 seconds, inspect and repair the following components:
- Oil pump assembly damaged or missing components
- Spacer plate and gaskets damaged or not assembled correctly
- 3-4 accumulator piston seals rolled or damaged
- 3-4 accumulator piston and pin missing, binding, or damaged
- Fourth clutch piston seal rolled or damaged
- Fourth clutch piston damaged, not assembled correctly, or seized
- Fourth clutch fiber and steel plates not assembled correctly, burned, or damaged
- Fourth clutch spring assembly damaged or not assembled correctly
- If the 3-4 shift time is greater than 0.65 seconds, inspect and repair the following components:
- Replace the automatic transmission fluid and filter. Refer to Transmission Fluid Check
.
- If the fluid is not at the proper level, add fluid as necessary.
- Perform the Reset Transmission Adapts function.
IMPORTANT:
The Reset Transmission Adapts function will clear all adapt cells. This may affect transmission performance. The TCM will update the transmission adapt cell values as the vehicle is driven.