Content .. 117 118 119 120 ..

Chrysler RG Voyager. Manual - part 119

Symptom:

*CABIN HEATER INOPERABLE FROM A/C - HEATER MODULE
(MTC)

POSSIBLE CAUSES

DCHA ACTIVATION CRITERIA NOT MET

NO PCI BUS COMMUNICATION WITH FCM/HVAC MODULE

FCM OR HAVC DTCS PRESENT

FCM FAULT

A/C - HEATER CONTROL MODULE FAULT

TEST

ACTION

APPLICABILITY

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.
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 all of the following criteria was met during the attempt to activate the
DCHA from the A/C - Heater Control Module.
The engine was running.
The engine’s coolant temperature was below 66°C (151°F).
The vehicle’s fuel tank had more than 1/8 of a tank of fuel.
The A/C - Heater Control Module’s Power switch was on.
The Blend Control was set above 90% reheat.
Was all criteria met during the attempt to activate the DCHA from the A/C - Heater
Control Module?

All

Yes

→ Go To 2

→ Attempt to activate the DCHA when all of the operating criteria

are met.
Perform CABIN HEATER VERIFICATION TEST - VER 1.

t, attempt to communicate with the FCM and the HVAC Module.

Was the DRBIII

t able to communicate with the FCM and the HVAC Module?

All

Yes

→ Go To 3

→ Refer to Communication for the related symptom(s)

Perform CABIN HEATER VERIFICATION TEST - VER 1.

445

CABIN HEATER

TEST

ACTION

APPLICABILITY

t, check for FCM and HVAC DTCs.

Does the DRBIII

t display any FCM or HVAC DTCs?

All

Yes

→ For FCM DTCs, return to the symptom list and choose the

symptom(s). Also, refer to Ignition, Power, Accessory category for
related symptom(s). For HVAC DTCs, refer to Heater & A/C for
related symptom(s).
Perform CABIN HEATER VERIFICATION TEST - VER 1.

→ Go To 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.
Start the engine.
Allow the engine to idle.
Turn the A/C - Heater Control Module’s Power switch on.
Turn the Blower control to the high speed position.
CAUTION: Do not activate the Diesel Cabin Heater 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 HVAC, Systems Tests, select Diesel Cabin Heater Test and press

#1.
With the DRBIII

t in HVAC, Systems Tests, Diesel Cabin Heater Test, read the Cabin

Heater Status.
Does the Status display: On?

All

Yes

→ Replace the FCM in accordance with the Service Information.

Perform CABIN HEATER VERIFICATION TEST - VER 1.

→ Replace the A/C - Heater Control Module in accordance with the

Service Information.
Perform CABIN HEATER VERIFICATION TEST - VER 1.

446

CABIN HEATER

*CABIN HEATER INOPERABLE FROM A/C - HEATER MODULE (MTC) —

Continued

Symptom:

*CABIN HEATER INOPERABLE FROM AUTO TEMP CONTROL
(ATC)

POSSIBLE CAUSES

DCHA ACTIVATION CRITERIA NOT MET

NO PCI BUS COMMUNICATION WITH FCM/ATC

FCM OR ATC DTCS PRESENT

FCM FAULT

AUTO TEMP CONTROL FAULT

TEST

ACTION

APPLICABILITY

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.
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 all of the following criteria was met during the attempt to activate the
DCHA from the Auto Temp Control.
The VIN indicates that the vehicle has a diesel engine.
The vehicle’s odometer read more than 5 miles.
The engine’s speed was above 500 rpm.
The engine’s coolant temperature was below 66°C (151°F).
The vehicle’s fuel tank had more than 1/8 of a tank of fuel.
The Auto Temp Control’s Power switch was on.
The Driver temperature control was set above 22°C (72°F).
Was all criteria met during the attempt to activate the DCHA from the Auto Temp
Control?

All

Yes

→ Go To 2

→ Attempt to activate the DCHA when all of the operating criteria

are met.
Perform CABIN HEATER VERIFICATION TEST - VER 1.

t, attempt to communicate with the FCM and the ATC.

Was the DRBIII

t able to communicate with the FCM and the ATC?

All

Yes

→ Go To 3

→ Refer to Communication for the related symptom(s)

Perform CABIN HEATER VERIFICATION TEST - VER 1.

447

CABIN HEATER

TEST

ACTION

APPLICABILITY

t, check for FCM and ATC DTCs.

Does the DRBIII

t display any FCM or ATC DTCs?

All

Yes

→ For FCM DTCs, return to the symptom list and choose the

symptom(s). Also, refer to Ignition, Power, Accessory category for
related symptom(s). For ATC DTCs, refer to Automatic Tempera-
ture Control for related symptom(s).
Perform CABIN HEATER VERIFICATION TEST - VER 1.

→ Go To 4

448

CABIN HEATER

*CABIN HEATER INOPERABLE FROM AUTO TEMP CONTROL (ATC) —

Continued

Content .. 117 118 119 120 ..