CHRYSLER VOYAGER 2001 Service Manual

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

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
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.
323
CABIN HEATER

Symptom:
B1824 FAN SWITCH LINE SHORT TO GROUND
When Monitored and Set Condition:
B1824 FAN SWITCH LINE 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
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.
324
CABIN HEATER

Symptom:
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE)
When Monitored and Set Condition:
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE)
When Monitored: When the DCHA system is off
Set Condition: The DCHA Low Side Driver inside the FCM expects to see a system
voltage of 13.8 volts through the DCHA relay coil when the DCHA system is off. This DTC
will set if the FCM sees a voltage below 3.5 volts on the Cabin Heater Assist Control circuit
during this time.
POSSIBLE CAUSES
NO RESPONSE FROM CABIN HEATER MODULE
CABIN HEATER ASSIST CONTROL CIRCUIT OPEN TO IPM
IPM, OPEN CIRCUIT
FCM, OPEN CIRCUIT
FCM FAULT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED TO THE GROUND CIRCUIT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED TO GROUND
CABIN HEATER ASSIST CONTROL CIRCUIT OPEN
DCHA CONTROL UNIT 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.
Turn the ignition on.
With the DRBIIIt, attempt to communicate with the Cabin Heater Module.
Does the DRBIIItdisplay: No Response From Cabin Heater Module?All
Ye s®Refer to Communication for the related symptom.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 2
325
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.
NOTE: Check connectors - Clean/repair as necessary.
While back probing, measure the voltage of the Cabin Heater Assist Control circuit
in the In-Line C330 harness connector.
Is battery voltage present?All
Ye s®Go To 3
No®Go To 5
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.
Turn the ignition off.
Disconnect the battery in accordance with the Service information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the In-Line C330 harness connector.
Measure the resistance of the Cabin Heater Assist Control circuit between the
In-Line C330 harness connector and the IPM C3 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Go To 4
No®Repair the Cabin Heater Assist Control circuit for an open.
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.
Turn the ignition off.
Disconnect the battery in accordance with the Service information.
Remove the FCM in accordance with the Service Information.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the IPM C3 harness connector.
Measure the resistance of the Cabin Heater Assist Control circuit in the IPM
(between IPM Cavity 11 for the C3 harness connector and IPM Cavity 15 for the FCM
connector).
Is the resistance below 5.0 ohms?All
Ye s®Replace the FCM in accordance with the Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Replace the IPM in accordance with the Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
326
CABIN HEATER
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE) ÐContinued

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.
Turn the ignition off.
Disconnect the battery in accordance with the Service information.
Remove the FCM in accordance with the Service Information.
Ensure the IPM and Cabin Heater harness connectors are connected.
Reconnect the battery in accordance with the Service information.
While back probing, measure the voltage of the Cabin Heater Assist Control circuit
in the In-Line C330 harness connector.
Is battery voltage present?All
Ye s®Replace the FCM in accordance with the Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 6
6WARNING: 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 IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1, C2, and Dosing Pump harness connectors.
Measure the resistance between the Cabin Heater Assist Control circuit and the
Ground circuit.
Is the resistance below 10K ohms?All
Ye s®Repair the Cabin Heater Assist Control circuit for a short to the
Ground circuit.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 7
327
CABIN HEATER
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE) ÐContinued

TEST ACTION APPLICABILITY
7WARNING: 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 IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Measure the resistance between ground and the Cabin Heater Assist Control circuit.
Is the resistance below 10K ohms?All
Ye s®Repair the Cabin Heater Assist Control circuit for a short to
ground.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 8
8WARNING: 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 IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Measure the resistance of the Cabin Heater Assist Control circuit between the Cabin
Heater Assist C1 harness connector and the IPM C3 harness connector.
Is the resistance below 5.0 ohms?All
Ye s®Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Repair the Cabin Heater Assist Control circuit for an open.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
328
CABIN HEATER
CABIN HEATER CONTROL CIRCUIT OPEN (ACTIVE) ÐContinued

Symptom:
CABIN HEATER CONTROL CIRCUIT SHORT TO BATTERY (AC-
TIVE)
When Monitored and Set Condition:
CABIN HEATER CONTROL CIRCUIT SHORT TO BATTERY (ACTIVE)
When Monitored: During DCHA activation and operation.
Set Condition: This DTC will set if the FCM sees a voltage between 5.0 and 15.0 volts on
the Cabin Heater Assist Control circuit.
POSSIBLE CAUSES
DCHA CONTROL UNIT FAULT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED TO THE FUSED B(+) CIRCUIT
FCM FAULT
CABIN HEATER ASSIST CONTROL CIRCUIT SHORTED HIGH
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.
Turn the ignition off.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Turn the ignition on.
With the DRBIIItin FCM, read the active DTCs.
Is the Cabin Heater Relay Short To Battery DTC still active?All
Ye s®Go To 2
No®Replace the DCHA Heater Module in accordance with the Service
Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
329
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.
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.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Turn the ignition on.
Measure the voltage between the Cabin Heater Assist Control circuit and ground.
Is there any voltage present?All
Ye s®Go To 3
No®Replace the FCM 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.
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 IPM C3 harness connector.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 and C2 harness connectors.
Measure the resistance between the Cabin Heater Assist Control circuit and the
Fused B(+) circuit.
Is the resistance below 10K ohms?All
Ye s®Repair the Cabin Heater Assist Control circuit for a short to the
Fused B(+) circuit.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Go To 4
330
CABIN HEATER
CABIN HEATER CONTROL CIRCUIT SHORT TO BATTERY (ACTIVE) Ð
Continued

TEST ACTION APPLICABILITY
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 off.
Disconnect the battery in accordance with the Service Information.
Remove the FCM in accordance with the Service Information.
Reconnect the IPM C3 harness connector.
Reconnect the battery in accordance with the Service Information.
Turn the ignition on.
NOTE: Check connectors - Clean/repair as necessary.
Disconnect the Cabin Heater Assist C1 harness connector.
Measure the voltage between the Cabin Heater Assist Control circuit and ground.
Is there any voltage present?All
Ye s®Repair the Cabin Heater Assist Control circuit for a short to
voltage.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
No®Replace the FCM in accordance with the Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.
331
CABIN HEATER
CABIN HEATER CONTROL CIRCUIT SHORT TO BATTERY (ACTIVE) Ð
Continued