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HEATING & A/C
A/C SWITCH FAULT (STORED) —
LOOPBACK TEST FAILURE (STORED)
When Monitored: When the A/C - Heater Control Module executes an internal loopback
test.
Set Condition: If the A/C - Heater Control Module fails to send a message, or none of the
expected messages arrive for 5 seconds, an internal loopback test is executed. If the
internal loopback test fails, the DTC will set.
MODE 1 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.
MODE 2 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.
RECIRC 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.
REFRIGERANT PRESS RX FAILURE (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module does not receive the
Refrigerant Pressure message from the PCM for more than 20 seconds.
TX FAILURE (STORED)
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.
VIN RX FAILURE (STORED)
When Monitored: With the ignition on.
Set Condition: This DTC will set if the A/C - Heater Control Module does not receive the
VIN message from the PCM for more than 5 seconds.
Continued
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