Diagnostic Aids
WARNING: This page is about a different variant/trim than selected.
The 5V reference 1 circuit provides 5 V to the sensors listed below:
- Air conditioning (A/C) refrigerant pressure sensor
- Multifunction intake air sensor
- Exhaust gas recirculation valve
- Camshaft position sensor
- Engine oil pressure sensor
- Diesel particulate filter exhaust differential pressure sensor
- Multifunction switch - center console
The 5V reference 2 circuit provides 5 V to the sensors listed below:
- Manifold absolute pressure/air temperature sensor
- Crankshaft position sensor
- Throttle position sensor
- Brake pedal position sensor
- Brake booster vacuum sensor
- Turbocharger vane position sensor
The 5V reference 3 circuit provides 5 V to the accelerator pedal position sensor 2.
The 5V reference 4 circuit provides 5 V to the sensors listed below:
- Accelerator pedal position sensor 1
- Fuel rail pressure sensor
Disconnecting one component at a time from the affected 5V reference circuit while observing the scan tool 5V Reference Circuit Status parameter may help locate the fault. The scan tool parameter will change from Malfunction to OK when the source of the fault is disconnected. If all 5V reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.