P0A9C

DTC P0A9C, P0AC6, P0ACB, P0AE9, P1A19 or P1A1C

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 Descriptor

DTC P0A9C
- Hybrid Battery 1 Temperature Sensor Performance

DTC P0AC6
- Hybrid Battery 2 Temperature Sensor Performance

DTC P0ACB
- Hybrid Battery 3 Temperature Sensor Performance

DTC P0AE9
- Hybrid Battery 4 Temperature Sensor Performance

DTC P1A19
- Hybrid Battery 5 Temperature Sensor Performance

DTC P1A1C
- Hybrid Battery 6 Temperature Sensor Performance

Circuit/System Description

The battery energy control module (BECM) monitors the hybrid battery pack temperature sensors to detect the failure of any sensor during a rationality check.

Conditions for Running the DTC

The engine is running.

Conditions for Setting the DTC

P0A9C, P0AC6, P0ACB, P0AE9, P1A19, P1A1C

Module temperature 1a, 1b, 2a, 2b, 3a or 3b - module temperature average is greater than battery rationality threshold. Where battery rationality threshold = as follows:






Action Taken When the DTC Sets

The hybrid system is disabled.

Conditions for Clearing the DTC

P0A9C, P0AC6, P0ACB, P0AE9, P1A19, P1A1C

Battery module temperature 1a, 1b, 2a, 2b, 3a or 3b = Valid.

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.