Normal Operation

If the 4X4 control module observes an overpower or under power voltage condition, DTCs are set and the 4X4 control module may not allow All-Wheel Drive (AWD) operation.

• DTC B1317 (Battery Voltage High) - When the 4X4 control module detects battery voltage greater than 16 volts for at least 10 seconds, this DTC is set.
• DTC B1318 (Battery Voltage Low) - When the 4X4 control module detects battery voltage less than 9 volts for at least 10 seconds, with the engine running at 1,500 rpm or greater, this DTC is set.

This pinpoint test is intended to diagnose the following: 

• Fuses
• Wiring, terminals or connectors
• 4X4 control module