MITSUBISHI ENDEAVOR 2004 Service Repair Manual

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.
HOW TO DIAGNOSE THE CAN BUS LINES 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)
1. Connect scan tool MB991958 to the data link connector.
2. Turn the ignition switch to the "ON" position.
3. Select "CAN bus diagnosis" from the start-up screen.
4. When the vehicle information is displayed, confirm that it matches the vehicle
whose CAN bus lines will be diagnosed. If they match, go to Step 8 . If not, go to step 5.
5. Select the "view vehicle information" button.
6. When the vehicle information is displayed, confirm again that it matches the
vehicle which is diagnosed CAN bus line. If they match, go to Step 8 . If not, go to step 5.
7. Select the "OK" button.
8. When the options are displayed, choose the options (mark the check) and then
select "OK". CAUTION: To prevent damage to scan tool MB991958, always
turn the ignition switch to the "LOCK" (OFF) position
before connecting or disconnecting scan tool
MB991958.

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

Fig. 8: Connecting Scan Tool (MB991958) To Data Link Connector

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

DIAGNOSTIC TROUBLE CODE CHARTFig. 9: Heater Air Conditioning, Ventilation Diagnostic Trouble Code Chart

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DIAGNOSTIC TROUBLE CODE PROCEDURES
CAUTION: During diagnosis, a DTC code associated with other
s
ystem ma
y be set when the i
gnition switch is turned
on with connector(s) disconnected. On completion of
repairs, confirm all systems for DTC code(s). If DTC
code(s) are set, erase them all.

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

DTC B1011, B1012: AMBIENT AIR TEMPERATURE SENSOR SYSTEM
CAUTION: If DTC B1011 or B1012 has been set, multi-display
related DTC U1130 is also set. After B1011 or B1012
has been diagnosed, don't forget to erase DTC
U1130.

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

Fig. 10: View Of Ambient Temperature Sensor Circuit With Connectors

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

Fig. 11: Identifying Connector A
-22

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

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
Fig. 12: Identifying Connectors C
-16 And C
-17
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y of MITSUBISHI MOTOR SALES OF AMERICA
.

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

Fig. 13: Identifying Connector C
-24
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DTC SET CONDITION
DTC B1011 is set if there is a short circuit in the ambient air temperature
sensor input circuit. DTC B1012 is set if there is a defective connector connection, or if there is an
open circuit in the harness.
TECHNICAL DESCRIPTION (COMMENT)
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

CURRENT TROUBLE
The A/C-ECU, the ambient air temperature sensor, or connector(s) or wiring
between the two may be defective.
Fig. 14: Identifying Connector C
-104

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PAST TROUBLE
If DTC B1011 or B1012 is stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) between the A/C-ECU and the
ambient air temperature sensor. 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
2004 Mitsubishi Endeavor LS
2004 HVAC Heater Air Conditioning, Ventilation - Endeavor

Malfunction of connector. Malfunction of the harness. Malfunction of the ambient air temperature sensor. 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