Diagnostic Aids

• If a shared 5 V reference circuit is shorted to ground or shorted to a voltage, other 5 V reference circuits may be affected.
• The scan tool 5 V reference parameter should display between 4.8-5.2 V.

P0641 

The 5 V reference 1 circuit provides 5 V to the following sensors:

• The exhaust camshaft position sensor
• The intake camshaft position sensor
• The A/C refrigerant pressure sensor
• The fuel tank pressure sensor

P0651 

The 5 V reference 2 circuit provides 5 V to the following sensors:

• The clutch pedal position (CPP) sensor
• The crankshaft position sensor
• The brake pedal position sensor

P0697 

The 5 V reference 3 circuit provides 5 V to the following sensors:

• The accelerator pedal position (APP) sensor 2
• The manifold absolute pressure (MAP) sensor

P06A3 

The 5 V reference 4 circuit provides 5 V to the following sensors:

• The accelerator pedal position (APP) sensor 1
• The throttle body throttle position sensors 1
• The throttle body throttle position sensor 2