TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, read HVAC DTCs.
Does the DRBIIIt display additional HVAC DTCs?
All
Yes → Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 2
2 Turn the ignition on.
With the DRBIIIt, check the PCM for any DTCs.
Are any DTCs present?
All
Yes → Refer to the Powertrain Diagnostic Information.
Perform BODY VERIFICATION TEST - VER 1.
No → Go To 3
3 Turn the ignition on.
With the DRB in HVAC, Monitor Display, PCI Bus Msgs, look for the applicable
message and displayed value (9A/C Hi Side Press: XX,99Veh Spd: XX,99Eng RPM:
XX,99Coolant Temp: XX,99Batt Volts: XX,99Batt Temp: XX,99VIN Msg Pres: YES9).
Does the DRB display NO RESPONSE after the applicable message?
All
Yes → Refer to symptom *No Response From PCM (PCI Bus) in the
Communication category.
Perform BODY VERIFICATION TEST - VER 1.
No → Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
389
HEATING & A/C
ENGINE GAUGE RX FAILURE (ACTIVE) — Continued
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