Circuit Description

The Engine Control Module (ECM) provides 5 volts to the following sensors through the 5 Volt Reference 2 Circuit:

• Manifold Absolute Pressure (MAP) sensor
• Exhaust Gas Recirculation position sensor
• Accelerator Pedal Position (APP) sensor
• A/C Pressure (ACP) sensor
• Rough Road sensor
• Fuel Tank Pressure (FTP) sensor

A circuit condition on one sensor 5 volt reference circuit may affect the other sensor 5 volt reference circuits. The ECM monitors the voltage on the 5 volt reference circuit. If the ECM detects that the voltage is out of tolerance, a DTC sets.