Circuit/System Testing
WARNING: This page is about a different car, the 2009 Saturn Outlook, 2009 GMC Acadia, 2009 Chevrolet Traverse, and 2009 Buick Enclave. However, it is still accessible from the selected car via links, so may be relevant.
IMPORTANT:
Diagnose any antilock brake system (ABS) related DTCs before performing this diagnostic.
- Ignition OFF, disconnect the X4 harness connector at the radio.
- Ignition ON, operate the vehicle drive wheels at 5 mph. Test for 3-7 Hertz between the VSS circuit terminal 5 and ground.
- If not within the specified range, test the VSS circuit for an open, high resistance, short to ground or short to voltage. If the circuit tests normal replace the EBCM.
- If the circuit tests normal, replace the radio.