Dodge Ram. Manual — part 102
Symptom:
*BLEND/MODE/RECIRC
DOOR
OPERATION
IMPROPER
--
SINGLE-ZONE
POSSIBLE CAUSES
CHECK FOR ACTUATOR CIRCUIT TEST FAULT MESSAGES
CHECK FOR ACTIVE HVAC DTCS
CHECK FOR HVAC DOOR RECALIBRATION FAULT MESSAGES
MODE DOOR ACTUATOR(S)/LINKAGE(S)/DOOR(S)
BLEND DOOR ACTUATOR/LINKAGE/DOOR
RECIRCULATION DOOR ACTUATOR/LINKAGE/DOOR
TEST
ACTION
APPLICABILITY
1
NOTE: All Actuator Circuit Test fault messages and Overcurrent DTCs must
be repaired before diagnosing Calibration fault messages.
Turn the ignition on.
With the DRBIII
t in HVAC, System Tests, actuate the Actuator Circuit Test.
Does the DRBIII
t display any Actuator Circuit Test fault messages?
All
Yes
→ Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 2
2
NOTE: All Actuator Circuit Test fault messages and Overcurrent DTCs must
be repaired before diagnosing Calibration fault messages.
Turn the ignition on.
With the DRBIII
t, read active HVAC DTCs.
Does the DRBIII
t display any active 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
NOTE: All Actuator Circuit Test fault messages and Overcurrent DTCs must
be repaired before diagnosing Calibration fault messages.
Turn the ignition on.
With the DRBIII
t in HVAC, System Tests, actuate the HVAC Door Recalibration
Test.
Does the DRBIII
t display any HVAC Door Recalibration fault messages?
All
Yes
→ Return to the symptom list and choose the symptom(s).
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
405
HEATING & A/C
TEST
ACTION
APPLICABILITY
4
Which door did customer ID as faulty?
All
Mode Doors
Go To
5
Blend Door
Go To
6
Recirculation Door
Go To
7
5
Start the engine.
Turn the blower control to the high speed position.
NOTE: The Mode 1 door must be at its physical end of travel in the panel
position to correctly direct airflow to the Mode 2 door.
NOTE: The Mode 2 door must be at its physical end of travel in the
floor-defrost position to correctly direct airflow to the Mode 1 door.
Turn the mode control to each door position for a minimum of 30 seconds and check
for airflow from the corresponding vents.
Does air flow from the correct vents for each door position?
All
Yes
→ Test Complete.
No
→ Remove door actuators from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuators in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
6
Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Turn the blend control to the full hot position.
Turn the blend control to the full cold position, in 25% increments, while checking for
a change in airflow air temperature coming from the panel vents.
Does the airflow air temperature change with respect to the position of the blend
control?
All
Yes
→ Test Complete.
No
→ Remove door actuator from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuator in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
406
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER -- SINGLE-
ZONE —
Continued
TEST
ACTION
APPLICABILITY
7
Start the engine.
Turn the blower control to the high speed position.
Turn the mode control to the panel position.
Turn the mode control to the MAX panel position. The sound of the air flowing
through the ducts should get louder as the recirculation door opens to bring in recirc
air.
Does the sound of the airflow get louder after turning the control to the MAX panel
position?
All
Yes
→ Test Complete.
No
→ Remove door actuator from A/C-Heater Housing Assy. By hand,
attempt to rotate the door actuator in both directions. Also,
inspect for disconnected, missing, or broken door actuator link-
age. Repair as necessary in accordance with the Service Informa-
tion.
Perform BODY VERIFICATION TEST - VER 1.
407
HEATING & A/C
*BLEND/MODE/RECIRC DOOR OPERATION IMPROPER -- SINGLE-
ZONE —
Continued
Symptom:
*BLOWER MOTOR INOPERATIVE
POSSIBLE CAUSES
IPM FUSE #4
BLOWER MOTOR FEED CIRCUIT SHORTED TO GROUND
FUSED B(+) SHORTED TO GROUND
BLOWER MOTOR SHORTED TO GROUND
BLOWER MOTOR
BLOWER MOTOR HIGH DRIVER CIRCUIT OPEN
GROUND CIRCUIT OPEN
A/C - HEATER CONTROL MODULE OPEN
BLOWER MOTOR FEED CIRCUIT OPEN
FUSED B(+) CIRCUIT OPEN
IGNITION SWITCH OPEN
TEST
ACTION
APPLICABILITY
1
Turn the ignition off.
Remove and inspect IPM Fuse #4.
Is the fuse open?
All
Yes
→ Go To 2
No
→ Go To 5
2
Turn the ignition off.
Replace IPM Fuse #4.
Turn the ignition on.
Turn the blower on and operate it in all speeds and modes.
Does the blower motor operate properly without blowing the fuse?
All
Yes
→ Check the Blower Motor Feed circuit and the Fused B(+) circuit
for an intermittent short to ground. Repair as necessary.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 3
3
Turn the ignition off.
Disconnect the Blower Motor harness connector.
Measure the resistance between ground and the Blower Motor Feed circuit.
Is the resistance below 10K ohms?
All
Yes
→ Repair the Blower Motor Feed circuit for a short to ground and
replace the fuse.
Perform BODY VERIFICATION TEST - VER 1.
No
→ Go To 4
408
HEATING & A/C
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст