P16B8

DTC P16B8-P16BA

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 P16B8 00
- Electric A/C Compressor Control Module Random Access Memory Performance

DTC P16B9 00
- Electric A/C Compressor Control Module Read Only Memory Performance

DTC P16BA 00
- Electric A/C Compressor Control Module Long Term Memory Performance

Circuit/System Description

The A/C compressor will diagnose its own systems and determine when a fault condition is present. This diagnostic applies to internal microprocessor integrity conditions within the A/C compressor. This fault is internal to the A/C compressor and no external circuits are involved.

Conditions for Running the DTC

* System voltage is greater than 10.25 V.
* The control module is awake and communicating.

Conditions for Setting the DTC

The control module has detected an internal malfunction.

Action Taken When the DTC Sets

DTCs P16B8, P16B9, and P16BA are type A DTCs.

Conditions for Clearing the DTC

* DTCs P16B8, P16B9, and P16BA are type A DTCs.
* After the vehicle has been OFF for a sufficient amount of time to allow the control modules to enter a sleep mode, the control modules will re-enable the output on the following ignition cycle and the DTC will become history.

Circuit/System Verification

Verify that DTC P16B8, P16B9, or P16BA is not set.

If any of the DTCs are set, replace the G1 A/C compressor.

Repair Instructions

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

Control Module References Programming and Relearning for control module replacement, programming and setup