Chrysler Voyager. Manual — part 282
TEST
ACTION
APPLICABILITY
3
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance of the 5 Volt Supply circuit between the A/C - Heater Control
Module C1 harness connector and the Rear Blower Rear Control Switch C2 harness
connector.
Is the resistance below 5.0 ohms?
All
Yes
→ Go To 4
No
→ Repair the 5 Volt Supply circuit for an open.
Perform BODY VERIFICATION TEST - VER 1.
4
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between ground and the Rear Temperature Feedback Signal
circuit.
Is the resistance above 100K ohms?
All
Yes
→ Go To 5
No
→ Repair the Rear Temperature Feedback Signal circuit for a short
to ground.
Perform BODY VERIFICATION TEST - VER 1.
5
Turn the ignition off.
Disconnect the A/C - Heater Control Module C1 harness connector.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Measure the resistance between the Rear Temperature Feedback Signal circuit and
the Rear Temperature Return circuit.
Is the resistance above 100K ohms?
All
Yes
→ Go To 6
No
→ Repair the Rear Temperature Feedback Signal circuit for a short
to the Rear Temperature Return circuit.
Perform BODY VERIFICATION TEST - VER 1.
6
Turn the ignition off.
Make sure that the A/C - Heater Control Module C1 harness connector is connected
to the A/C - Heater Control Module.
Disconnect the Rear Blower Rear Control Switch C2 harness connector.
Turn the ignition on.
With the DRBIII
t, read active HVAC DTCs.
Does the DRBIII
t display: Rear Blend Pot Circuit Short?
All
Yes
→ Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Replace the Rear Blower Rear Control Switch in accordance with
the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
555
HEATING & A/C
REAR BLEND POT CIRCUIT SHORT (ACTIVE) - MTC —
Continued
Symptom:
TX FAILURE (ACTIVE) - MTC
When Monitored and Set Condition:
TX FAILURE (ACTIVE) - MTC
When Monitored:
When the ignition is on.
Set Condition:
This DTC will set if the A/C - Heater Control Module is unable to send a
message.
POSSIBLE CAUSES
ATTEMPT TO COMMUNICATE WITH THE HVAC MODULE
ADDITIONAL CODE(S) PRESENT
ATTEMPT TO COMMUNICATE WITH THE PCM/ECM, BCM, AND FCM
A/C - HEATER CONTROL MODULE
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the HVAC Module.
Was the DRBIII
t able to I/D or communicate with the HVAC Module?
All
Yes
→ Go To 2
No
→ Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
2
Turn the ignition on.
With the DRBIII
t, read HVAC DTCs.
Does the DRBIII
t display any additional HVAC DTCs?
All
Yes
→ Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition on.
With the DRBIII
t, attempt to communicate with the PCM/ECM.
With the DRBIII
t, attempt to communicate with the BCM.
With the DRBIII
t, attempt to communicate with the FCM.
Was the DRBIII
t able to I/D or communicate with the PCM/ECM, BCM and FCM?
All
Yes
→ Go To 4
No
→ Refer to Communication for the related symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
556
HEATING & A/C
TEST
ACTION
APPLICABILITY
4
Turn the ignition on.
With the DRBIII
t, erase HVAC DTCs.
Cycle the ignition switch and wait approximately 1 minute.
With the DRBIII
t, read HVAC DTCs.
Did this DTC reset?
All
Yes
→ Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Test Complete.
557
HEATING & A/C
TX FAILURE (ACTIVE) - MTC —
Continued
Symptom List:
*A/C STATUS INDICATOR FLASHING - MTC
*RECIRC STATUS INDICATOR FLASHING - MTC
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be *A/C STATUS INDICATOR
FLASHING - MTC.
POSSIBLE CAUSES
AC COOLDOWN TEST NEEDS TO BE RUN
HVAC DOOR RECALIBRATION NEEDS TO BE RUN
TEST
ACTION
APPLICABILITY
1
Turn the ignition on.
Which status indicator is flashing on the A/C-Heater Control Module?
All
A/C Status Indicator
RECIRC Status Indicator
2
CAUTION: The evaporator temperature must be above 12.7°C (55°F) and the
work area ambient temperature must be above 21.1°C (70°F) to test A/C
operation.
NOTE: The A/C status indicator will flash twice per second to indicate that
the AC Cooldown Test needs to be run.
NOTE: The A/C status indicator will stop flashing twice per second if either
the AC Cooldown Test returns passed, or if any button on the control is
pressed, or if the ignition is cycled and the odometer shows greater than
eight miles.
NOTE: The Power and A/C status indicators will flash alternately while the
AC Cooldown Test is running.
Start the engine.
Turn the Blower control to the high speed position.
With the DRBIII
t in HVAC, System Tests, actuate the AC Cooldown Test.
Does the DRBIII
t display: Cooldown Test Passed?
All
Yes
→ Test Complete.
No
→ Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
558
HEATING & A/C
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