Dodge ZB 2005 - Heating & A;C; A;C Switch Fault (Active); Checksum Failure (Active); Defog Switch Fault (Active)

Symptom List:
A/C SWITCH FAULT (ACTIVE)
CHECKSUM FAILURE (ACTIVE)
DEFOG SWITCH FAULT (ACTIVE)
Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be A/C SWITCH FAULT (ACTIVE).
When Monitored and Set Condition:
A/C SWITCH FAULT (ACTIVE)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C on/off switch stays closed for 10 minutes.
CHECKSUM FAILURE (ACTIVE)
When Monitored: At every power up (five seconds after ignition is on).
Set Condition: This DTC will set if the calculated check sum does not match the stored
value.
DEFOG SWITCH FAULT (ACTIVE)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the EBL switch stays closed for 10 minutes.
POSSIBLE CAUSES
A/C - HEATER CONTROL MODULE
TEST ACTION APPLICABILITY
1 View repair All
Repair
Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
204
HEATING & A/C