TEST
ACTION
APPLICABILITY
1
WARNING: DO NOT OPERATE THE DCHA IN AN ENCLOSED AREA SUCH
AS A GARAGE THAT DOES NOT HAVE EXHAUST VENTILATION FACILI-
TIES. ALWAYS VENT THE DCHA’s EXHAUST WHEN OPERATING THE
DCHA. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN
PERSONAL INJURY OR DEATH.
CAUTION: DO NOT PERFORM THIS TEST UNLESS DIRECTED HERE BY
THE CABIN HEATER PRE-TEST. ALWAYS PERFORM THE CABIN HEATER
PRE-TEST PRIOR TO PERFORMING ANY OTHER CABIN HEATER TEST
FOR THE RESULT TO BE VALID.
Verify that there is more than an 1/8 of a tank of fuel in the vehicle’s fuel tank.
Is there more than an 1/8 of a tank of fuel in the vehicle’s fuel tank?
All
Yes
→ Go To 2
No
→ Add fuel to the vehicle’s fuel tank to bring the fuel level above 1/8
of a tank.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
2
WARNING: DO NOT OPERATE THE DCHA IN AN ENCLOSED AREA SUCH
AS A GARAGE THAT DOES NOT HAVE EXHAUST VENTILATION FACILI-
TIES. ALWAYS VENT THE DCHA’s EXHAUST WHEN OPERATING THE
DCHA. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN
PERSONAL INJURY OR DEATH.
WARNING: ALLOW THE DCHA ASSEMBLY TO COOL BEFORE PERFORM-
ING A COMPONENT INSPECTION/REPAIR/REPLACEMENT. FAILURE TO
FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
Turn the ignition on.
CAUTION: Do not actuate the Dosing Pump more than two times. Doing so
will put excess fuel in the DCHA Heater Module and cause smoke to emit
from the DCHA exhaust pipe when heater activation occurs.
With the DRBIII
t in Actuators, select Dosing Pump. Listen for the pump to run. A
clicking noise should be heard coming from the pump.
Press Page Back and select No to stop the Dosing Pump actuation.
Does the Dosing Pump run when actuated?
All
Yes
→ Go To 3
No
→ Replace the Dosing Pump in accordance with the Service Infor-
mation.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
288
CABIN HEATER
B1800 NO START —
Continued