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:
- Accelerator pedal position sensor 2
- Air conditioning refrigerant pressure sensor
- Diesel particulate filter pressure sensor
- Fuel rail pressure sensor
- Multifunction intake air sensor
The 5V reference 2 circuit provides 5 V to the sensors listed below:
- Accelerator pedal position sensor 1
- Brake pedal position sensor
- Camshaft position sensor
- Diesel exhaust fluid pressure sensor
- Exhaust gas recirculation valve position sensor
- Manifold absolute pressure sensor
The 5V reference 3 circuit provides 5 V to the sensors listed below:
- Engine oil pressure sensor
- Throttle position sensor
- Turbocharger vane position 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.