P1A60

DTC P1A60

Diagnostic Instructions

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

DTC Descriptors
DTC P1A60 00
- Ignition Accessory Switch Circuit Low Voltage

Diagnostic Fault Information






Circuit/System Description

The hybrid powertrain control module 2 sends the accessory power mode status in a serial data message to the battery energy control module (BECM). The hybrid powertrain control module 2 also powers up the accessory circuit to the BECM when the propulsion system is active, after the vehicle crank mode.

Conditions for Running the DTC

* Vehicle power mode is propulsion system active
* BECM is awake
* System voltage greater than 9 V

Conditions for Setting the DTC

RUN/Crank input is active, and 500 ms after the RUN/Crank input transitions high, a voltage below 5 V is detected 3 consecutive times

Action Taken When the DTC Sets

DTC P1A60 is a type B DTC.

Conditions for Clearing the DTC

DTC P1A60 is a type B DTC.

Diagnostic Aids

A short to voltage in the ACC control circuit will keep the vehicle bus awake, which can drain the vehicle's battery.

Reference Information
Schematic Reference

* Body Control System Schematics [1][2]Body Control Systems
* Power Distribution Schematics Power Distribution Schematics

Connector End View Reference

Component Connector End Views Hybrid/EV Battery Pack X1 A4
Description and Operation

Power Mode Description and Operation Power Mode
Electrical Information Reference

* Circuit Testing Circuit Testing
* Connector Repairs Connector Repairs
* Testing for Intermittent Conditions and Poor Connections Testing for Intermittent Conditions and Poor Connections
* Wiring Repairs Wiring Repairs

Scan Tool Reference

Control Module References Control Module References for scan tool information

Circuit/System Testing

1. Disconnect the X2 harness connector at the A4 hybrid battery pack.
2. Ignition OFF, test for B+ between the ignition circuit terminal 3 and ground.

• If B+, test the ignition circuit for a short to voltage. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

3. Ignition ON, verify that a test lamp illuminates between the ignition circuit terminal 3 and ground.

• If the test lamp does not illuminate, test the ignition circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the K114B hybrid powertrain control module 2.

4. If all circuits test normal, replace the K16 battery energy control module.

Repair Instructions

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

Control Module References Control Module References for the appropriate control module replacement, programming and setup