P0ADC

DTC P0ADB or P0ADC

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 P0ADB
- Hybrid Battery Positive Contactor Control Circuit Low Voltage

DTC P0ADC
- Hybrid Battery Positive Contactor Control Circuit High Voltage

Circuit/System Description

The battery energy control module (BECM) monitors the conductor control circuit for a shorted low or high condition.

Conditions for Running the DTC

Ignition On.

Conditions for Setting the DTC

P0ADB

Contactor control feedback is greater than 98 percent.

P0ADC

Contactor control feedback is less than 5 percent.

Action Taken When the DTC Sets

Hybrid system is disabled.

Conditions for Clearing the DTC

P0ADB, P0ADC
* State is Run, Service or Powerdown.
* Contactor state = Closed.
* Contactor status = Open, Service or Disconnect.

Diagnostic Aids

* Possible wiring harness short to ground.
* Possible wiring harness short to voltage or open.

Reference Information
Schematic Reference

Hybrid Energy Storage Schematics ([1][2]Electrical Diagrams)
Connector End View Reference

Component Connector End Views (Connector End Views By Name)
Description and Operation

Generator Battery Carrier Description and Operation (Description and Operation)
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 (Programming and Relearning) for scan tool information

Circuit/System Verification

Warning

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.

Warning

To help avoid personal injury, be careful when working in the vicinity of the battery energy control module. Internal components will still be live, 36V potential, even when the cover has been opened or removed.

1. With a scan tool, clear the DTC.
2. Ignition OFF, wait 30 seconds.
3. Using the ECM scan tool conductor control special function command the conductor Open and Closed.

• If the conductor does not operate or the DTC resets replace the BECM.

Repair Instructions

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

Control Module References (Programming and Relearning) for BECM replacement, setup, and programming