Circuit/System Verification

WARNING: This page is about a different car, the 2018 Chevrolet Suburban 3500 HD. However, it is still accessible from the selected car via links, so may be relevant.

Ignition - On/Vehicle - In Service Mode
Verify the scan tool parameter:
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit High Voltage Test Status = Not Run or OK
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit Low Voltage Test Status = Not Run or OK
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit Open Test Status = Not Run or OK
- If not the specified state
  Refer to Circuit/System Testing.
- Go to next step: If the specified state
Verify the scan tool parameter:
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit High Voltage Test Status = Not Run or OK
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit Low Voltage Test Status = Not Run or OK
- Transmission Control Solenoid Valve 4, 5, 8 Control Circuit Open Test Status = Not Run or OK
- Perform the action while monitoring the parameter:
- Wiggle the harness and connector: X175 @ T12 Automatic Transmission Assembly
- Wiggle the harness and connector: K71 Transmission Control Module
- If not the specified state
  Repair as necessary - Wiring/Terminal(s)/Electrical Connector(s)
- Go to next step: If the specified state
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
  Refer to: Circuit/System Testing
- Go to next step: If the DTC is not set
All OK.