Diagnostic Routine AC

Diagnostic Routine AC

Diagnostic Overview

U0155:00

DTC Fault Trigger Conditions






Pinpoint Test

1. VERIFY THE CUSTOMER CONCERN

1. Ignition ON.

2. Verify there is an observable symptom present.

Is an observable symptom present?






2. CHECK THE COMMUNICATION NETWORK

1. Ignition ON.

2. Using a scan tool, perform network test.

Does the IPC (Instrument Panel Cluster) pass the network test?






3. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE IPC (Instrument Panel Cluster) SELF-TEST

1. Using a scan tool, perform IPC (Instrument Panel Cluster) self-test.

2. Check for recorded DTCs (Diagnostic Trouble Codes) from the IPC (Instrument Panel Cluster) self-test.

Is DTC (Diagnostic Trouble Code) U3006:16 or DTC (Diagnostic Trouble Code) U3006:17 recorded?






4. RETRIEVE THE RECORDED DTCs (Diagnostic Trouble Codes) FROM THE HVAC (Heating, Ventilation, and Air Conditioning) MODULE SELF-TEST

1. Using a scan tool, perform HVAC (Heating, Ventilation, and Air Conditioning) module self-test.

2. Check for recorded DTCs (Diagnostic Trouble Codes) from the HVAC (Heating, Ventilation, and Air Conditioning) module self-test.

Is DTC (Diagnostic Trouble Code) U3006:16 or DTC (Diagnostic Trouble Code) U3006:17 recorded?






5. RECHECK THE HVAC (Heating, Ventilation, and Air Conditioning) MODULE DTCs (Diagnostic Trouble Codes)

NOTE: If new modules were installed prior to the DTC (Diagnostic Trouble Code) being set, the module configuration may be incorrectly set during the PMI (Programmable Module Installation) or the PMI (Programmable Module Installation) may not have been carried out.

1. Clear the DTCs (Diagnostic Trouble Codes).

2. Wait 10 seconds.

3. Using a scan tool, perform HVAC (Heating, Ventilation, and Air Conditioning) module self-test.

Is DTC (Diagnostic Trouble Code) U0155:00 still present?






6. CHECK FOR DTC (Diagnostic Trouble Code) U0155:00 SET IN OTHER MODULES

1. Clear all DTCs (Diagnostic Trouble Codes).

2. Ignition OFF.

3. Ignition ON.

4. Wait 10 seconds.

5. Using a scan tool, retrieve all continuous memory DTCs (Diagnostic Trouble Codes).

Is DTC (Diagnostic Trouble Code) U0155:00 set in any other module?