Diagnostic Aids

This DTC can set as a result of conditions external to the accessory power control module. Before attempting to diagnose a history DTC, ensure that none of the following conditions have occurred:

• High voltage contactor relays opening any time the accessory DC power control module is doing 42 volt conversion.
• The high voltage system greater than 390 volts or less than 216 volts during 42 volt conversion. Extreme cold weather conditions may occasionally cause the high voltage system to be greater than 390 volts.
• The 12 volt circuit was less than 6.7 volts during 42 volt conversion.
• A short circuit condition on the 42 volt circuit which causes the accessory DC power control module to produce greater than 60 amps.