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
- Exhaust and intake camshaft position sensors
- Engine oil pressure sensor
- Fuel rail pressure sensor
- Fuel tank pressure sensor
- Multifunction intake air sensor
The 5V reference 2 circuit provides 5 V to the sensors listed below:
- Brake booster vacuum sensor
- Brake pedal position sensor
- Crankshaft position sensor
The 5V reference 3 circuit provides 5 V to the sensors listed below:
- Accelerator pedal position sensor 2
- Manifold absolute pressure sensor
The 5V reference 4 circuit provides 5 V to the sensors listed below:
- Accelerator pedal position sensor 1
- Throttle position sensor 1 and 2
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.