The engine control module (ECM) monitors the hybrid battery pack for an overtemperature condition.

The engine is running.

Maximum module temperature is greater than 57 degrees Celsius (134.6 degrees Fahrenheit) for 1.7 minutes.

Does not affect hybrid system operation.

Hybrid battery temperature returns to lower than or equal to 57 degrees Celsius (134.6 degrees Fahrenheit).

Schematic Reference

Hybrid Energy Storage Schematics

Connector End View Reference

Hybrid Energy Storage Connector End Views

Electrical Information Reference

Scan Tool Reference

Scan Tool Data List

Caution: To help avoid personal injury, additional precautions must be taken prior to working on the generator control module or the generator starter. After removing the 36V battery cables from the generator battery, remove both engine wiring harness connectors from the generator control module. Wait at least 5 minutes and then remove the generator control module cover. Verify voltage levels at all 36V, 12V, and 3-phase connections, are less than 3 volts using a DMM before proceeding.

Caution: To help avoid personal injury, be careful when working in the vicinity of the generator battery disconnect control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.

1. If DTC is history, refer to diagnostic aids or Testing for Intermittent Conditions and Poor Connections
2. If DTC is current, replace the generator battery disconnect control module.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for generator battery disconnect control module replacement, setup, and programming