Tx Failure (Active) - Dodge Ram 2004 Service Manual

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.
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
CHECK FOR ADDITIONAL HVAC DTCS
ATTEMPT TO COMMUNICATE WITH THE PCM AND MIC
A/C - HEATER CONTROL MODULE
INTERMITTENT WIRING PROBLEM
TEST
1 Turn the ignition on.
With the DRBIII , attempt to communicate with the HVAC Module.
Was the DRBIII able to I/D or communicate with the HVAC Module?
Yes → Go To 2
→ Refer to the Communication category for the related symptom(s).
No
2 Turn the ignition on.
With the DRBIII , read HVAC DTCs.
Does the DRBIII display additional HVAC DTCs?
Yes → Return to the symptom list and choose the symptom(s).
→ Go To 3
No
3 Turn the ignition on.
With the DRBIII , attempt to communicate with the PCM.
With the DRBIII , attempt to communicate with the MIC.
Was the DRBIII able to I/D or communicate with the PCM and the MIC?
Yes → Go To 4
→ Refer to the Communication category for the related symptom(s).
No
POSSIBLE CAUSES
ACTION
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
Perform BODY VERIFICATION TEST - VER 1.
395
HEATING & A/C
APPLICABILITY
All
All
All