Circuit Description

The Powertrain Control Module (PCM) provides a 5-volt reference to the following sensors:

• The Throttle Position (TP) sensor 2
• The Accelerator Pedal Position (APP) sensor 1
• The Manifold Absolute Pressure (MAP) sensor

The PCM monitors voltage on the 5-volt reference circuit. If the voltage is higher or lower than required, DTC P0651 will set.