Circuit/System Testing
WARNING: This page is about a different car, the 2019 Buick Cascada, 2018 Buick Cascada, and 2017 Buick Cascada. However, it is still accessible from the selected car via links, so may be relevant.
- Ignition/Vehicle - Off
- Remove the component: Control Valve Body Cover
- Connect the electrical connector: X1@Q8 Control Solenoid Valve Assembly
- Disconnect the electrical connector:X4@Q8 Control Solenoid Valve Assembly - B14A Transmission Output Shaft Speed Sensor
- Ignition - On / Vehicle - In Service Mode
- Verify the scan tool parameter: ISS/OSS Supply Voltage=OK
- If not the specified state
- Ignition/Vehicle - Off
- Disconnect the electrical connector: X3@Q8 Control Solenoid Valve Assembly - B14C Transmission Input Shaft Speed Sensor
- Verify the condition does not exist: Contamination with metallic debris@Electrical Connector - X3 & X4
- If a condition exists - Repair or replace as necessary
- Go to next step: If no condition exists
- Ignition - On / Vehicle - In Service Mode
- Verify the scan tool parameter: ISS/OSS Supply Voltage = OK
- If not the specified state - Replace the component: Q8 Control Solenoid Valve Assembly
- If the specified state - Replace the component: B14C Transmission Input Shaft Speed Sensor
- Go to next step: If the specified state
- Perform the following procedure/test:Control Solenoid Valve and Transmission Control Module Assembly Input Shaft Speed/Output Shaft Speed Input Test
Verify the procedure/test passes.
- If the procedure/test does not pass
Replace the component: Q8 Control Solenoid Valve Assembly
- Go to next step: If the procedure/test passes
- If the procedure/test does not pass
- Verify the condition does not exist: Park Gear - Damaged or misaligned reluctor ring.
- If a condition exists
Repair or replace as necessary.
- Go to next step: If no condition exists
- If a condition exists
- Test or replace the component: B14A Transmission Output Shaft Speed Sensor