Page 2084 of 3870
STEP 6. Check the air mixing damper control motor and potentiometer.
Fig. 61: Identifying Damper Position
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
1. Operate the air mixing damper control motor as described in the table
below. CAUTION: Do not apply battery voltage when the damper is
in the MAX COOL or MAX HOT position.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2085 of 3870
Fig. 62: Air Mixing Damper Control Motor Operating Table
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2. Measure the resistances between connector terminals 3 and 5, and between
3 and 7, while the air mixing damper control motor is running. The
resistances should change gradually within the standard value.
Standard value: 1.7 (MAX HOT) - 5.0 (MAX COOL) kohm
Q: Are the air mixing damper control motor and potentiometer in good
condition?
YES:
Go to Ste
p 7.
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2086 of 3870
NO:
Replace the air mixing damper control motor and potentiometer.
Then go to Step 7.
STEP 7. Recheck for diagnostic trouble code.
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
Page 2087 of 3870
Fig. 63: Connectin
g Scan Tool MB991958 To Data Link Connector
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2088 of 3870
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 B1045: AIR MIXING DAMPER CONTROL MOTOR AND POTENTIOMETER (ACTIVATING SYSTEM
FAILURE)
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2089 of 3870
Fig. 64: Air Mixing Damper Control Motor Circuit Diagram
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2090 of 3870
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
Fig. 65: Identifying Connectors C
-16 And C
-109
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
DTC SET CONDITION
If the air mixing damper control motor does not work normally, DTC
No.B1045 will be set.
TECHNICAL DESCRIPTION (COMMENT)
CURRENT TROUBLE
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor
Page 2091 of 3870
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
If DTC B1045 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:
MB991223: Harness Set 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
