Dodge Dakota (R1). Manual — part 50
TEST
ACTION
APPLICABILITY
5
Turn the ignition off.
Remove the applicable door actuator from the A/C - Heater Housing Assembly.
Disconnect the door actuator harness connector.
By hand, attempt to rotate the door actuator in both directions.
Inspect the A/C - Heater Housing Assembly for missing and broken actuator linkage.
Inspect the linkage and the actuator for broken and missing teeth.
Check the doors for binding and loss of full range.
Is the door actuator, the linkage, and the door in good condition and functioning
correctly?
All
Yes
→
Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Repair as necessary in accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
197
HEATING & A/C
BLEND CALIBRATION FAULT —
Continued
Symptom List:
BLEND OVERCURRENT (ACTIVE)
MODE OVERCURRENT (ACTIVE)
RECIRC OVERCURRENT (ACTIVE)
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be BLEND OVERCURRENT (AC-
TIVE).
When Monitored and Set Condition:
BLEND OVERCURRENT (ACTIVE)
When Monitored:
When actuator movement is requested.
Set Condition:
All (Blend, Mode, and Recirc) Overcurrent DTCs will set if the A/C -
Heater Control Module detects an excessive current draw on the Common Door Drive
circuit.
MODE OVERCURRENT (ACTIVE)
When Monitored:
When actuator movement is requested.
Set Condition:
All (Blend, Mode, and Recirc) Overcurrent DTCs will set if the A/C -
Heater Control Module detects an excessive current draw on the Common Door Drive
circuit(s).
RECIRC OVERCURRENT (ACTIVE)
When Monitored:
When actuator movement is requested.
Set Condition:
All (Blend, Mode, and Recirc) Overcurrent DTCs will set if the A/C -
Heater Control Module detects an excessive current draw on the Common Door Drive
circuit.
POSSIBLE CAUSES
DOOR DRIVER CIRCUIT(S) SHORTED LOW
DOOR DRIVER CIRCUIT(S) SHORTED HIGH
DOOR ACTUATOR(S) SHORTED
A/C - HEATER CONTROL MODULE
198
HEATING & A/C
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Measure the resistance between ground and each of the door driver circuits.
Is the resistance below 10K ohms on any of the circuits?
All
Yes
→
Repair all door driver circuits with a resistance below 10K ohms
for a short to ground.
Perform BODY VERIFICATION TEST - VER 1.
No
→
2
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Turn the ignition on.
Measure the voltage between each of the door driver circuits and ground.
Is there any voltage present on any of the circuits?
All
Yes
→
Repair all door driver circuits with voltage present for a short to
voltage.
Perform BODY VERIFICATION TEST - VER 1.
No
→
3
Turn the ignition off.
Disconnect the A/C - Heater Control C1 harness connector.
Measure the resistance between the Common Door Driver circuit and each of the
remaining door driver circuits.
Is the resistance below 30.0 ohms on any of the circuits?
All
Yes
→
Replace all door actuators with a resistance below 30.0 ohms in
accordance with the Service Information.
Perform BODY VERIFICATION TEST - VER 1.
No
→
Replace the A/C - Heater Control Module in accordance with the
Service Information.
Perform BODY VERIFICATION TEST - VER 1.
199
HEATING & A/C
BLEND OVERCURRENT (ACTIVE) —
Continued
Symptom List:
COOLDOWN TEST EXCESSIVE FAULT
COOLDOWN TEST SENSOR FAILURE
Test Note:
All symptoms listed above are diagnosed using the same tests.
The title for the tests will be COOLDOWN TEST EXCESSIVE
FAULT.
When Monitored and Set Condition:
COOLDOWN TEST EXCESSIVE FAULT
When Monitored:
When executing the Cooldown Test.
Set Condition:
This message will be displayed if the A/C system is unable to bring the
evaporator temperature down -6.7°C (20°F) within one minute.
COOLDOWN TEST SENSOR FAILURE
When Monitored:
When executing the Cooldown Test.
Set Condition:
This message will be displayed if a fault is detected with the Evaporator
Temperature Sensor/circuit when executing the Cooldown Test.
POSSIBLE CAUSES
CHECK FOR HVAC DTCS
CHECK FOR PCM DTCS
A/C SYSTEM TESTING
TEST
ACTION
APPLICABILITY
1
CAUTION: The evaporator temperature must be above 18.3°C (65°F) to test
A/C system operation.
Turn the ignition on.
With the DRBIII
t, read HVAC DTCs.
Does the DRBIII
t display any HVAC DTCs?
All
Yes
→
Return to the symptom list and choose the symptom(s).
After repair is complete, rerun the Cooldown Test.
Perform BODY VERIFICATION TEST - VER 1.
No
→
200
HEATING & A/C
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