P1A30

DTC P1A22, P1A23, P1A29, P1A2A, P1A30, or P1A31

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 P1A22
- Hybrid Battery 1 Circuit Low Voltage

DTC P1A23
- Hybrid Battery 1 Circuit High Voltage

DTC P1A29
- Hybrid Battery 2 Circuit Low Voltage

DTC P1A2A
- Hybrid Battery 2 Circuit High Voltage

DTC P1A30
- Hybrid Battery 3 Circuit Low Voltage

DTC P1A31
- Hybrid Battery 3 Circuit High Voltage

Circuit/System Description

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

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

P1A22

Module 1 voltage raw A/D is less than 0.5 volt.

P1A23

Module 1 voltage raw A/D is greater than 4.5 volts.

P1A29

Module 2 voltage raw A/D is less than 0.5 volt.

P1A2A

Module 2 voltage raw A/D is greater than 4.5 volts.

P1A30

Module 3 voltage raw A/D is less than 0.5 volt.

P1A31

Module 3 voltage raw A/D is greater than 4.5 volts.

Action Taken When the DTC Sets

P1A22, P1A23, P1A29, P1A2A, P1A30, P1A31

Hybrid system is inactive.

Conditions for Clearing the DTC

P1A22, P1A123, P1A29, P1A2A, P1A30, P1A31

Module voltage raw A/D returns to normal.

Circuit/System Verification

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 Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics
2. If DTC is current, replace the BECM.

Repair Instructions

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

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