TEST
ACTION
APPLICABILITY
6
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Zone Status?
All
No Pulses
Go To
8
Too Few Pulses
Inspect the A/C - Heater Housing Assembly for a condition causing
the driver blend linkage/door to bind. Repair as necessary in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
7
NOTE: After completing HVAC Door Recalibration, the DRBIII
t will store
the total span and the status of each door actuator. Selecting HVAC Door
Cal Monitor in System Tests will display this information.
With the DRBIII
t in HVAC, select System Tests, and then select HVAC Door Cal
Monitor.
Which message does the DRBIII
t display for Recirc Status?
All
No Pulses
Go To
8
Too Few Pulses
Inspect the A/C - Heater Housing Assembly for a condition causing
the recirculation linkage/door to bind. Repair as necessary in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Too Many Pulses
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
Broken Linkage
Remove door actuator from housing. By hand, attempt to rotate
actuator in both directions. Also, inspect for disconnected, miss-
ing, or broken door linkage, and a warped or broken door. Repair
as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
653
HEATING & A/C
BLEND CALIBRATION FAULT - MTC —
Continued