Chrysler Voyager. Manual — part 220
TEST
ACTION
APPLICABILITY
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.
CAUTION: 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 off.
Disconnect the battery in accordance with the Service information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Dosing Pump harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 and C2 harness connectors.
Measure the resistance between the Dosing Pump Control circuit and the Ground
circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Dosing Pump Control circuit for a short to the Ground
circuit.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No
→ Go To 3
3
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 off.
Disconnect the battery in accordance with the Service information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Dosing Pump harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Measure the resistance between ground and the Dosing Pump Control circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Dosing Pump Control circuit for a short to ground.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No
→ Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
307
CABIN HEATER
B1820 DOSING PUMP CIRCUIT: SHORT TO GROUND —
Continued
Symptom List:
B1821 COMBUSTION AIR FAN CIRCUIT: OPEN
B1821 COMBUSTION AIR FAN CIRCUIT: SHORT TO GROUND
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be B1821 COMBUSTION AIR FAN
CIRCUIT: OPEN.
When Monitored and Set Condition:
B1821 COMBUSTION AIR FAN CIRCUIT: OPEN
When Monitored:
After DCHA activation, when the system is in a steady state of
operation.
Set Condition:
This DTC will set if the DCHA Control detects no-load voltage on the
Combustion Air Fan circuit output pin.
B1821 COMBUSTION AIR FAN CIRCUIT: SHORT TO GROUND
When Monitored:
After DCHA activation, when the system is in a steady state of
operation.
Set Condition:
This DTC will set if the DCHA Control detects a high current draw on the
Combustion Air Fan circuit output pin.
POSSIBLE CAUSES
COMBUSTION AIR FAN/DCHA CONTROL UNIT FAULT
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.
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.
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.
NOTE: If present, diagnose and repair DTC B1801 Flame Out before diag-
nosing this DTC.
Turn the ignition off.
View repair
All
Repair
Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
308
CABIN HEATER
Symptom List:
B1822 GLOW PIN/FLAME SENSOR: OPEN
B1822 GLOW PIN/FLAME SENSOR: SHORT TO GROUND
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be B1822 GLOW PIN/FLAME SEN-
SOR: OPEN.
When Monitored and Set Condition:
B1822 GLOW PIN/FLAME SENSOR: OPEN
When Monitored:
After DCHA activation.
Set Condition:
This DTC will set if the Glow Pin resistance is not within the expected
parameters.
B1822 GLOW PIN/FLAME SENSOR: SHORT TO GROUND
When Monitored:
After DCHA activation, when the system is in a steady state of
operation.
Set Condition:
This DTC will set if the Glow Pin resistance is not within the expected
parameters.
POSSIBLE CAUSES
GLOW PIN/HEATER MODULE FAULT
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.
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.
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.
Turn the ignition off.
View repair
All
Repair
Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
309
CABIN HEATER
Symptom List:
B1823 WATER PUMP CIRCUIT: OPEN
B1823 WATER PUMP CIRCUIT: SHORT TO GROUND
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be B1823 WATER PUMP CIRCUIT:
OPEN.
When Monitored and Set Condition:
B1823 WATER PUMP CIRCUIT: OPEN
When Monitored:
During DCHA activation and operation.
Set Condition:
This fault is erroneous for this DCHA assembly.
B1823 WATER PUMP CIRCUIT: SHORT TO GROUND
When Monitored:
During DCHA activation and operation.
Set Condition:
This fault is erroneous for this DCHA assembly.
POSSIBLE CAUSES
DCHA CONTROL UNIT FAULT
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.
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.
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.
Turn the ignition off.
View repair
All
Repair
Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
310
CABIN HEATER
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