Chapter 6: Alarms and System Failure Codes
Alarms
Service Manual 6-7
6.1.14 Heater Doors Not Closed Alarm
6.1.15 Heater Doors Not Open Alarm
Cause or Circumstances Failure Action
This alarm activates as the
canopy reaches about halfway
down and the heater doors are
not both closed.
Doors not closing Check to sure both heater doors
are closing fully as the canopy
starts to lower. If not, fix
mechanical problem.
Doors are closed. Defective switch or harness The two heater door switches are in
series. Check for continuity at J31
1-3. If defective, remove heater
housing cover and check continuity
at connector in switch harness pins
1-3 to determine if switches or
harness in rail is defective. If
continuity is good, continue.
Defective 50 pin ribbon cable
between the relay and control
board
Check for continuity on pin 8. If
defective, replace the cable. If
good, continue.
Defective relay board Replace the relay board.
Cause or Circumstances Failure Action
This alarm activates as the
canopy reaches the top of its
travel and the heater doors are
not both open.
Doors not opening Check to be sure both heater doors
are opening fully when the canopy
is all the way up. If not, fix
mechanical problem. For example,
adjust the spring tube position to
allow full travel.
Doors are open. Defective switch or harness The 2 door switches are in series.
Check for continuity at J31 2-3. If
defective, remove heater housing
cover and check continuity at
connector in switch harness pins 2-
3 to determine if switches or
harness in rail is defective. If
continuity is good, continue.
Defective 50-pin ribbon cable
between the relay and control
board
Check for continuity on pin 7. If
defective, replace the cable. If good,
continue.
Defective relay board Replace the relay board.