Normal Operation

The wake up control circuit is used to wake up the PCM  prior to engine cranking. The PCM  needs to wake up prior to a crank request so that it has time to go through its own initialization. The wake up control circuit also powers the Passive Anti-Theft System (PATS) transceiver (if equipped). The wake up control circuit is controlled by the Body Control Module (BCM) and receives voltage from fuse 18 (10A).

The BCM  activates the wake up control circuit when:

• the driver door is opened.
• a remote start request is received (if equipped with factory remote start).
• the brake pedal is pressed.
• a key is inserted into the ignition.
• the ignition is in the RUN or START position.
• the start/stop switch is pressed, (if equipped with Intelligent Access (IA))
• DTC C113A:11 (Wake up Control: Circuit Short To Ground) - sets when the BCM  detects a short to ground on the wake up control circuit.
• DTC C113A:15 (Wake up Control: Circuit Short To Battery or Open) - sets when the BCM  detects a short to voltage or an open on the wake up control circuit.

This pinpoint test is intended to diagnose the following: 

• Wiring, terminals or connectors
• PATS  transceiver (if equipped)
• PCM 
• BCM