P16BA

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

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

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

For symptom byte information, refer to Symptom Byte List Symptom Byte List.

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 device is awake and communicating.

Conditions for Setting the DTC

The device 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 devices to enter a sleep mode, the devices will re-enable the output on the following ignition cycle and the DTC will become history.

Circuit/System Verification

1. Vehicle in Service Mode.

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

• If any of the DTCs are set
Replace the G1 A/C Compressor.

• If none of the DTCs are set

3. All OK

Repair Instructions

Perform the Diagnostic Repair Verification Verification Tests after completing the repair.

Control Module References Programming and Relearning for device replacement, programming and setup