2004 MITSUBISHI ENDEAVOR air conditioning

Fig. 51: Locating Connector C
-31
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

Q: Is the wiring harness between A/C-ECU connector C-16 (terminal 12),
C-17 (terminals 34 and 26) and A/C pressure sensor connector A-28
(terminals 3, 1 and 2) in good condition?

YES:
Replace the A/C-ECU. Then go to Step 8.
NO:
Repair the wiring harness. Then go to Step 8.
STEP 8. Recheck for dia
gnostic trouble code
.
NOTE: Also check intermediate connector C-31 for loose,
corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector C-31 is
damaged, repair or replace the connector as described
in HARNESS CONNECTOR INSPECTION
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Check again if the DTC is set.
1. Connect scan tool MB991958 to the data link connec
tor

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 52: Connecting Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
2. Turn the ignition switch to the "ON" position.
3. Check if the DTC is set.
4. Turn the ignition switch to the "LOCK" (OFF) position.
Q: Is the check result satisfactory?

YES:
The procedure is complete.
NO:
Return to Step 1 .
DTC B1041, B1042: AIR MIXING DAMPER CONTROL MOTOR AND POTENTIOMETER (POTENTIOMETER
SYSTEM) Fig. 53: View Of Air Mixing Damper Control Motor And Potentiometer Circuit

Courtes
y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 54: Identifying Connectors C
-16,C
-17 And C
-109

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 55: Identifying Connectors C
-103 And C
-104

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.

DTC SET CONDITION
DTC B1041 or B1042 is set if there is an open or short circuit in the
potentiometer input circuit, or if there is an open circuit in the power circuit or
earth circuit.
TECHNICAL DESCRIPTION (COMMENT)
CURRENT TROUBLE
The A/C-ECU, the air mixing damper control motor and potentiometer, or
connector(s) or wiring between the two may be defective.
PAST TROUBLE
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

If DTC B1041 or B1042 is stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) between the A/C-ECU and the
air mixing damper control motor and potentiometer. If the connectors and
wiring are normal, and obviously the ECU is the cause of the trouble, replace
the ECU. If in doubt, do not replace the ECU.
TROUBLESHOOTING HINT
Malfunction of connector. Malfunction of the harness. Malfunction of the air mixing damper control motor and potentiometer. Malfunction of the A/C-ECU.
DIAGNOSIS REQUIRED SPECIAL TOOL:

MB991958: Scan Tool (MUT-III Sub Assembly)
MB991824: Vehicle Communication Interface (V.C.I.) MB991827: MUT-III USB Cable MB991910: MUT-III Main Harness A (Vehicles with CAN
communication system)
STEP 1. Using scan tool MB991958, diagnose the CAN bus line.

Use scan tool MB991958 to diagnose the CAN bus lines.
1. Connect scan tool MB991958 to the data link connec
tor.

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Fig. 56: Connectin
g Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor