A/C Switch Fault (Stored); Backlight Dimming Rx Failure (Stored); Blend Overcurrent (Stored); Checksum Failure (Stored) - Dodge ZB 2005 Service Manual

Symptom List:

A/C SWITCH FAULT (STORED)

BACKLIGHT DIMMING RX FAILURE (STORED)

BLEND OVERCURRENT (STORED)

CHECKSUM FAILURE (STORED)

DEFOG SWITCH FAULT (STORED)

LOOPBACK TEST FAILURE (STORED)

MODE 1 OVERCURRENT (STORED)

MODE 2 OVERCURRENT (STORED)

RECIRC OVERCURRENT (STORED)

REFRIGERANT PRESS RX FAILURE (STORED)

TX FAILURE (STORED)

VIN RX FAILURE (STORED)

Test Note: All symptoms listed above are diagnosed using the same tests.
The title for the tests will be A/C SWITCH FAULT (STORED).
When Monitored and Set Condition:
A/C SWITCH FAULT (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C on/off switch stays closed for 10 minutes.
BACKLIGHT DIMMING RX FAILURE (STORED)
When Monitored: With the ignition on.
Set Condition: If the A/C - Heater Control Module does not receive the dimming function
message from the Body Control Module for more than 5 seconds, then the A/C - Heater
Control Module backlighting will default to full brightness and the DTC will set.
BLEND OVERCURRENT (STORED)
When Monitored: When actuator movement is requested.
Set Condition: This DTC will set if the A/C - Heater Control Module detects an excessive
current draw on any of the door driver circuits while attempting to drive this actuator.
Only one overcurrent DTC can set per ignition cycle.
CHECKSUM FAILURE (STORED)
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 (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the EBL switch stays closed for 10 minutes.
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HEATING & A/C