2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1168

2010 Cadillac Truck Escalade EXT AWD V8-6.2L Page 1168

DTC Descriptor

DTC P0AFA

- Hybrid Battery System Voltage Low - ACCM 300V

Diagnostic Fault Information

Typical Scan Tool Data

Circuit/System Description

The air conditioner control module (ACCM) monitors the high voltage direct current (HVDC) voltage to ensure that the voltage stays within the

proper range. Damage to components, and incorrect data may occur when the voltage is out of range. If the ACCM detects low HVDC voltage,

then DTC P0AFA will set.

Conditions for Running the DTC

* The engine is running or is in autostop mode.

* The 12V system voltage is between 9.5-18 V.

Conditions for Setting the DTC

The ACCM detects that the hybrid battery voltage is less than 191 volts for 3 seconds.

Action Taken When the DTC Sets

The air conditioning is disabled.

Conditions for Clearing the DTC

* The DTC will pass when the ACCM detects a hybrid battery voltage greater than 201 V for 3 seconds.

* A history DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.

Reference Information

Schematic Reference

* HVAC Schematics (See: Heating and Air Conditioning/Diagrams/Electrical Diagrams/HVAC - Automatic)

* Hybrid Controls Schematics ()

Connector End View Reference

Component Connector End Views (See: Diagrams/Connector Views)

Description and Operation

* Heating and Air Conditioning System Description and Operation (HP2) ()

* High Voltage Monitoring Systems Description ()