2001 CHRYSLER VOYAGER sensor

TEST ACTION APPLICABILITY
7 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance between ground and the KDB Clock circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 8
No®Repair the KDB Clock circuit for a short to ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
8 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance of the KDB Clock circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 9
No®Repair the KDB Clock circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
9 If there are no possible causes remaining, view repair. All
Repair
Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
10 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance between ground and the KDB Data circuit.
Is the resistance above 100k ohms?All
Ye s®Go To 11
No®Repair the KDB Data circuit for a short to ground.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
11 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the ATC C2 harness connector.
Measure the resistance of the KDB Data circuit.
Is the resistance below 5.0 ohms?All
Ye s®Go To 12
No®Repair the KDB Data circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
278
AUTOMATIC TEMPERATURE CONTROL
REAR IR SENSOR NOT CALIBRATED (ACTIVE) ÐContinued

TEST ACTION APPLICABILITY
12 If there are no possible causes remaining, view repair. All
Repair
Replace the ATC.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
13 Turn the ignition off.
Disconnect the Rear Automatic Temperature Control Switch harness connector.
Disconnect the BCM C4 harness connector.
Measure the resistance of the Ignition Switch (Run) circuit.
Is the resistance below 5.0 ohms?All
Ye s®Replace the BCM.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
No®Repair the Ignition Switch (Run) circuit for an open.
With the DRBIIIt, reset the ATC after repair/replacement is
complete.
Perform BODY VERIFICATION TEST - VER 1.
279
AUTOMATIC TEMPERATURE CONTROL
REAR IR SENSOR NOT CALIBRATED (ACTIVE) ÐContinued

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 sections 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
300
CABIN HEATER

TEST ACTION APPLICABILITY
2WARNING: 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.
Turn the ignition off.
Inspect the vehicle's battery terminals, cable terminals, and cables for corrosion and
damage in accordance with the Service Information.
Test the vehicle's battery in accordance with the Service Information.
Is the vehicle's battery system Ok?All
Ye s®Go To 3
No®Clean/repair the vehicle's battery system in accordance with the
Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
3WARNING: 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.
Check the vehicle's charging system for proper operation in accordance with the
Service Information.
Is the vehicle's charging system operating properly?All
Ye s®Go To 4
No®Repair the vehicle's charging system in accordance with the
Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
4WARNING: 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.
With the DRBIIItin Sensors, record the DCHA Operating Voltage.
Disconnect the Cabin Heater Assist C1 harness connector.
Measure the voltage between the Fused B+ circuit and ground.
Is there more than 1.0 volt difference between the Operating Voltage and the Fused
B+ voltage?All
Ye s®Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 5
305
CABIN HEATER
B1802 POWER SUPPLY OUT OF RANGE: LOW VOLTAGE THRESHOLD Ð
Continued

TEST ACTION APPLICABILITY
5WARNING: 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.
Make sure that the Cabin Heater Assist C1 harness connector is connected to the
DCHA.
Connect a suitable voltmeter to the vehicle's battery. Position the voltmeter where it
can be monitored while operating the DRBIIIt.
Turn the ignition on.
Set the Blend Control to the max cool position.
Turn the A/C - Heater Control Module's Power switch off.
Start the engine.
Allow the engine to idle.
Turn the A/C - Heater Control Module's Power switch on.
Turn the Blower switch to the high speed position.
CAUTION: Do not activate the DCHA Field Mode Test with the engine off.
Failure to follow these instructions may 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 may result in excess emissions from the DCHA
during heater operation.
With the DRBIIItin Cabin Heater, Systems Tests, select Field Mode and press Enter.
Set the Blend Control to the max heat position.
With the DRBIIItin Sensors, monitor the DCHA Operating Voltage and the
voltmeter while the Field Mode Test is running. Upon completion of the Field Mode
Test proceed as follows:
Turn the Blower switch off and turn the A/C - Heater Control Module's Power switch
off.
Turn the engine off.
Was there more than 1.5 volts difference between Operating & battery voltage during
the test?All
Ye s®Repair the high resistance in the Fused B+ circuit.
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.
306
CABIN HEATER
B1802 POWER SUPPLY OUT OF RANGE: LOW VOLTAGE THRESHOLD Ð
Continued

Symptom:
B1803 FLAME DETECTED PRIOR TO COMBUSTION
When Monitored and Set Condition:
B1803 FLAME DETECTED PRIOR TO COMBUSTION
When Monitored: During DCHA start up.
Set Condition: This DTC will set if the Flame Sensor resistance is not within the expected
parameters.
POSSIBLE CAUSES
FLAME SENSOR FAULT
TEST ACTION APPLICABILITY
1WARNING: 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 repairAll
Repair
Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
308
CABIN HEATER

Symptom:
B1811 HEATER OVERHEATED
When Monitored and Set Condition:
B1811 HEATER OVERHEATED
When Monitored: After DCHA activation, when the system is in a steady state of
operation.
Set Condition: This DTC will set if the Coolant Temperature Sensor resistance is not
within the expected parameters (coolant temperature in the Heater Module exceeds 125ÉC
[257ÉF]).
POSSIBLE CAUSES
DCHA HEATER MODULE FAULT
DCHA COOLANT HOSES RESTRICTED/LEAKING/DAMAGED
ENGINE'S COOLING SYSTEM FAULT
DCHA CONTROL UNIT FAULT
B1811 CLEARED, ADDITIONAL DTC(S) PRESENT
TEST ACTION APPLICABILITY
1WARNING: 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.
NOTE: If there is an internal leak in the Heater Module, a continuous loud
chunking or grinding noise may have been heard coming from the DCHA
assembly during the Field Mode test.
Check for engine coolant continuously flowing out of the DCHA exhaust pipe.
Is engine coolant coming out of the DCHA exhaust pipe?All
Ye s®Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 2
309
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
1WARNING: 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 repairAll
Repair
Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
322
CABIN HEATER