P0ABD

DTC P0ABC or P0ABD

Diagnostic Instructions

* Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. Initial Inspection and Diagnostic Overview
* Review Strategy Based Diagnosis for an overview of the diagnostic approach.
* Diagnostic Procedure Instructions provides an overview of each diagnostic category.

DTC Descriptors

DTC P0ABC
- Hybrid Battery Voltage Sensor Circuit Low Voltage

DTC P0ABD
- Hybrid Battery Voltage Sensor Circuit High Voltage

Circuit/System Description

The battery energy control module (BECM) monitors the pack voltage for low or high voltage condition.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

P0ABC

Pack Voltage raw A/D less than 0.5 volt

P0ABD

Pack Voltage raw A/D greater than 4.5 volts

Action Taken When the DTC Sets

P0ABC, P0ABD

Hybrid system is inactive.

Conditions for Clearing the DTC

P0ABC, P0ABD

Pack voltage returns to normal.

The engine is running.

Circuit/System Testing

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.

P0ABC
1. Disconnect harness connector C1 from the BECM.
2. Test for less than 6.5 volts between terminal 1 and terminal 12.

• If greater than the specified range, replace the BECM.

3. Test for 1.3 Kohms - 1.7 Kohms between terminal 1 and Busbar 1/Ring Terminal 7.

• If not within the specified range, replace the harness assembly.

4. Test for 1.3 Kohms - 1.7 Kohms between terminal 12 and Busbar 6/Ring Terminal 4.

• If not within the specified range, replace the harness assembly.

P0ABD
1. Disconnect harness connector C1 from the BECM.
2. Test for less than 58.5 volts between terminal 1 and terminal 12.

• If greater than the specified range, replace the BECM.

3. Test for 1.3 Kohms - 1.7 Kohms between terminal 1 and Busbar 1/Ring Terminal 7.

• If not within the specified range, replace the harness assembly.

4. Test for 1.3 Kohms - 1.7 Kohms between terminal 12 and Busbar 6/Ring Terminal 4.

• If not within the specified range, replace the harness assembly.

Repair Instructions

Perform the Diagnostic Repair Verification after completing the diagnostic procedure. Verification Tests

Control Module References for BECM replacement, setup, and programming.