2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1717

2010 Cadillac Truck Escalade/ESV RWD V8-6.2L Page 1717

DTC P061B

- Control Module Torque Calculation Performance

Circuit/System Description

This diagnostic applies to internal microprocessor integrity conditions within the hybrid powertrain control module (HPCM). The HPCM monitors

its ability to read and write to the memory. The HPCM processor monitors the data to verify that the indicated torque calculation is correct. The

HPCM is located within the drive motor generator power inverter module (PIM) and is not serviceable separately.

Conditions for Running the DTC

P061A

* Ignition voltage is 8-18V.

* Regenerative braking torque is greater than 0 Nm.

P061B

* Ignition voltage is 8-18V.

* Any output or brake torque is present.

Conditions for Setting the DTC

P061A

The control module has detected the internal software calculation for regenerative braking torque has an error of greater than 100 Nm.

P061B

The control module has detected a torque calculation error.

Action Taken When the DTC Sets

* DTCs P061A and P061B are Type A DTCs.

* The HPCM commands the battery energy control module (BECM) to open the high voltage contactor relays.

Conditions for Clearing the DTC

DTCs P061A and P061B are Type A DTCs.

Reference Information

DTC Type Reference

Powertrain Diagnostic Trouble Code (DTC) Type Definitions (See: Diagnostic Trouble Code Descriptions/Powertrain Diagnostic Trouble Code

(DTC) Type Definitions)

Circuit/System Verification

1. Clear the DTC information.

2. Ignition OFF for 1 minute.

3. Ignition ON, start and drive the vehicle.

4. Retest for DTCs P061A and P061B.

Circuit/System Testing

P061A

Program the PIM with the latest software version and recheck for DTCs.

If the DTC resets after programming or if the PIM already contains the latest software version, replace the PIM.

P061B

1. DTC P061B may set when Hybrid Battery power output is limited. A reduced hybrid battery power condition is most noticeable during high

electrical loads such as Autostop to Autostart transitions. Inspect for hybrid battery DTCs or conditions that would reduce available hybrid

battery power such as:

* Hybrid Battery Module undervoltage / P0AFA and various DTCs

* Hybrid Battery Module overvoltage / various DTCs

* Hybrid Battery Module voltage variation / P0AFA, P0BBD

* Hybrid Battery overtemperature / P0C32

* Hybrid Battery exposure to extreme cold