Symptom:
TX FAILURE (ACTIVE)
When Monitored and Set Condition:
TX FAILURE (ACTIVE)
When Monitored: When the ignition is on.
Set Condition: This DTC will set if the A/C - Heater Control Module is unable to send a
PCI Bus message.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
CHECK FOR ADDITIONAL HVAC DTCS
ATTEMPT TO COMMUNICATE WITH THE PCM AND BCM
A/C - HEATER CONTROL MODULE
INTERMITTENT WIRING PROBLEM
TEST ACTION APPLICABILITY
1 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the HVAC Module.
Was the DRBIIIt able to I/D or communicate with the HVAC Module?
All
Yes → Go To 2
No → Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2 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 3
3 Turn the ignition on.
With the DRBIIIt, attempt to communicate with the PCM.
With the DRBIIIt, attempt to communicate with the BCM.
Was the DRBIIIt able to I/D or communicate with the PCM and the BCM?
All
Yes → Go To 4
No → Refer to the Communication category for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
224
HEATING & A/C
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