Circuit/System Testing
WARNING: This page is about a different car, the 2010 GMC Sierra, 2010 GMC Cab & Chassis Sierra, 2010 Chevrolet Silverado, and 2010 Chevrolet Cab & Chassis Silverado. However, it is still accessible from the selected car via links, so may be relevant.
NOTE:
Fuel pressure control will be disable if DTC P0087, P0088, P0192, or P0193 are set. Codes must be cleared to enable the device control.
- Turn OFF the ignition.
- Disconnect the ECM connector and the fuel pressure regulator connector.
- Test the fuel pressure regulator solenoid supply voltage circuit for a short to voltage.
- Disconnect the FRP sensor.
- Test the FRP signal circuit, the 5-volt reference circuit, and the low reference circuit for high resistance.
- If all circuits test normal, replace the FRP sensor.