Diagnostic Aids
WARNING: This page is about a different car, the 2011 Cadillac DTS. However, it is still accessible from the selected car via links, so may be relevant.
- The 5 V reference 1 circuit provides 5 V to the following sensors:
- Air conditioning (A/C) refrigerant pressure sensor
- Manifold absolute pressure (MAP) sensor
- Fuel tank pressure (FTP) sensor
- Accelerator pedal position (APP) sensor 2
- Exhaust gas recirculation (EGR) position sensor
- Camshaft position sensor
- The 5 V reference 2 circuit provides 5 V to the following sensors:
- APP sensor 1
- Throttle position sensor 1 and 2
- Secondary air injection (AIR) check valve
- Crankshaft position sensor
- It may be possible to locate the fault by disconnecting one component at a time from the 5 V reference circuit while viewing the 5 V Reference Circuit parameter on the scan tool. The scan tool parameter would change from Fault to OK when the source of the fault is disconnected. If all 5 V reference components have been disconnected and a fault is still indicated, the fault may exist in the wiring harness.