Chrysler RG Voyager. Manual — part 110
TEST
ACTION
APPLICABILITY
4
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 CAN 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 CAN RESULT IN PERSONAL INJURY
OR DEATH.
NOTE: The DCHA Control will store up to three DTCs in its memory.
NOTE: If the DCHA Control detects a new fault in the DCHA system, one
that is not already stored in its memory, the DCHA Control will clear the
oldest of the three stored DTCs, and it will store the new fault’s DTC.
NOTE: If the DCHA control detects a reoccurrence of a stored fault, the
DCHA control will overwrite that fault’s DTC with the most recent occur-
rence.
Turn the ignition on.
On MTC, set the Blend control to the max cool position.
On ATC, set the Driver temperature control to LO (max cool).
Turn the ATC’s or MTC’s Power switch off.
With the DRBIII
t, record and erase Cabin Heater and FCM DTCs.
Start the engine.
Allow the engine to idle.
Turn the ATC’s or MTC’s Power switch on.
Turn the Blower control to the high speed position.
CAUTION: Do not activate the DCHA Field Mode Test with the engine off.
Failure to follow these instructions can result in internal damage to the
DCHA Heater Module.
NOTE: Do not disconnect the vehicle’s battery or the DCHA’s main power
supply while the DCHA is in operation or in run-down mode. Failure to
follow these instructions can result in excess emissions from the DCHA
during heater operation.
With the DRBIII
t in Cabin Heater, Systems Tests, select Field Mode and press Enter.
The test will run for approx 8.5 minutes.
On MTC, set the Blend control to the max heat position. Upon completion of the Field
Mode Test, proceed as follows:
On ATC, set the Driver temperature control to HI (max heat). Upon completion of the
Field Mode Test, proceed as follows:
With the DRBIII
t, read Cabin Heater and Active FCM DTCs.
Turn the Blower control off and turn the ATC’s or MTC’s Power switch off.
Turn the engine off.
Are any DTCs present?
All
Yes
→ Return to the symptom list and choose the DTC(s). Diagnose and
repair all FCM faults prior to diagnosing DCHA faults. If DTC
B1813 Heater In Lockout Mode reset with other DTC(s), reset the
heater before diagnosing the other DTC(s).
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No
→ Go To 5
409
CABIN HEATER
A. CABIN HEATER PRE-TEST —
Continued
TEST
ACTION
APPLICABILITY
5
Is the symptom Cabin Heater inoperable from the ATC or from the MTC?
All
Yes - MTC
Refer to symptom *Cabin Heater Inoperable From A/C - Heater
Module (MTC) in the Cabin Heater category.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
Yes - ATC
Refer to symptom *Cabin Heater Inoperable From Auto Temp
Control (ATC) in the Cabin Heater category.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No
→ Let DCHA cool. Inspect fuel line, intake & exhaust, & coolant
hoses for restrictions, obstructions, loose clamps, leakage, etc.
Check connectors. Clean & repair as necessary. Refer to Service
Manual for additional symptom based diagnosis, if necessary.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
410
CABIN HEATER
A. CABIN HEATER PRE-TEST —
Continued
Symptom:
B1000 CONTROL UNIT ERRONEOUS
When Monitored and Set Condition:
B1000 CONTROL UNIT ERRONEOUS
When Monitored:
During DCHA activation.
Set Condition:
This DTC will set if a fault occurs with the DCHA Control Unit’s memory.
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 CAN 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 CAN 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.
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.
411
CABIN HEATER
Symptom List:
B1800 NO START
B1801 FLAME OUT: DURING HEATING CYCLE
B1801 FLAME OUT: UNSTABLE OPERATION
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be B1800 NO START.
When Monitored and Set Condition:
B1800 NO START
When Monitored:
After DCHA activation.
Set Condition:
This DTC will set if the Flame Sensor resistance is not within the expected
parameters 160 seconds after activation.
B1801 FLAME OUT: DURING HEATING CYCLE
When Monitored:
After DCHA activation, and during subsequent start attempts.
Set Condition:
This DTC will set if the Flame Sensor resistance is not within the expected
parameters.
B1801 FLAME OUT: UNSTABLE OPERATION
When Monitored:
After DCHA activation.
Set Condition:
This DTC will set if the Flame Sensor resistance is not within the expected
parameters.
POSSIBLE CAUSES
LOW FUEL LEVEL IN VEHICLE’S FUEL TANK
DOSING PUMP INOPERABLE, NO DOSING PUMP DTCS SET
DCHA FUEL LINE RESTRICTED/LEAKING/DAMAGED
DOSING PUMP
DCHA AIR INTAKE/EXHAUST RESTRICTED
DCHA HEATER MODULE FAULT
412
CABIN HEATER
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