Diagnostic Aids
WARNING: This page is about a different car, the 2008 Cadillac CTS. However, it is still accessible from the selected car via links, so may be relevant.
- The 5-volt reference 1 circuit provides 5 volts to the following sensors:
- The fuel tank pressure (FTP) sensor
- The engine oil pressure (EOP) sensor
- The fuel rail pressure (FRP) sensor-LLT only
- The 5-volt reference 2 circuit provides 5 volts to the following sensors:
- All four camshaft position (CMP) sensors
- Accelerator pedal position (APP) sensor 1
- The 5-volt reference 3 circuit provides 5 volts to the following sensors:
- Throttle position sensor (TPS) 1 and 2
- Crankshaft position (CKP) sensor
- Accelerator pedal position (APP) sensor 2
- A/C pressure sensor