Circuit/System Description

This DTC can set in either the engine control module (ECM) or the Hybrid/EV Powertrain Control Module 2. These modules share the same circuit for this DTC however the criteria and reasons for setting are different. Whenever the propulsion system goes active, the diagnostic reads its internal timer and evaluates the results from the wake-up events that could have occurred.

For each wake-up event the status can be:

• Pass - the wake-up event occurred within a window 14 V Power Module
• Indeterminate - the ECM was already awake at the time the wake-up event could have occurred
• Fail - the wake-up event occurred outside a window or did not occur at all

  If any of the wake-up events indicate a failure then the DTC fails.