Circuit/System Verification
WARNING: This page is about a different car, the 2008 GMC Yukon and 2008 Chevrolet Tahoe. However, it is still accessible from the selected car via links, so may be relevant.
- Start the engine.
- Using the scan tool, observe the 42V Circuit Voltage parameter on the APM data list.
- If the voltage is less than 40 volts, proceed to Circuit/System Testing.
- Rotate the steering wheel back and forth while stationary.
- If the voltage is less than 40 volts, the EPS is drawing excessive current. Replace the power steering motor.