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.
Clear the DTC and operate the vehicle under the conditions for running and setting the DTC.
- If the DTC resets, test the TCM ignition 1 voltage circuit for battery positive voltage at the TCM 16-way connector.
- If the voltage is less than battery voltage, test the Ignition 1 voltage circuit for an open or short to ground and repair the circuit as necessary.