• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
The engine control module (ECM) monitors the hybrid battery pack for a high current condition.
The engine is running.
Battery pack current is greater than 140 amps or less than -330 amps.
Hybrid system is disabled.
• | Battery pack current is inside the threshold. |
• | Battery pack current = Valid. |
• | Current sensor out of range diagnostics and performance (DTC P0AC0, P0AAC1, P0AC2, P1A48 and P1A49) = Not Fail. |
This diagnostic could occur in conjunction with a open hybrid battery fuse.
Hybrid Energy Storage Schematics
Hybrid Energy Storage Connector End Views
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.
⇒ | If the DTC is history refer to Testing for Intermittent Conditions and Poor Connections or diagnostic aids. |
⇒ | If the hybrid battery fuse was open, test the 36-volt positive cable from the starter/generator control module (SGCM) to hybrid battery pack for a short to ground. |
⇒ | If there is an open or high resistance, replace the 36-volt positive cable. |
Perform the Diagnostic Repair Verification after completing the diagnostic procedure.