MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Fig. 5: Connecting Scan Tool MB991958 To Data Link Connector
2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
DIAGNOSTIC TROUBLE CODE CHART Fig. 6: Automatic Air Conditioning Diagnostic Trouble Code Chart

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DIAGNOSTIC TROUBLE CODE PROCEDURES DTC B1001, B1002: INTERIOR TEMPERATURE SENSOR SYSTEM NOTE: For test procedures not included in this article, refer to
DIAGNOSTIC TROUBLE CODE CHART
.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 7: View Of Temperature Sensor Circuit

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

Fig. 8: Identifying Connectors C
-16 & C
-17
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 9: Identifying Connectors C
-104 And C
-120

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DTC SET CONDITION
DTC B1001 is set if there is a short circuit in the interior temperature sensor
input circuit. DTC B1002 is set if there is a defective connector connection, or if there is an
open circuit in the harness.
TECHNICAL DESCRIPTION (COMMENT)
CURRENT TROUBLE
The A/C-ECU, the interior air temperature sensor, or connector(s) or wiring
between the two may be defective.
PAST TROUBLE
2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

If DTC B1001 or B1002 is stored as a past trouble, carry out diagnosis with
particular emphasis on wiring and connector(s) between the A/C-ECU and the
interior 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
Malfunction of connector. Malfunction of the harness. Malfunction of the interior temperature sensor. Malfunction of the A/C-ECU.
DIAGNOSIS Required Special Tools:

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 connector.
2. Turn the ignition switch to "ON" position.
3. Diagnose the CAN bus line.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 10: Connecting Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
Q: Is the check result satisfactory?

YES:
Go to Step 2.
NO:
Repair the CAN bus lines (Refer to
CAN COMMUNICATION
SIGNAL TABLE
). Then go to Step 7 .
STEP 2. Recheck for diagnostic trouble code.

Recheck if the DTC is set.
1. Erase the DTC.
2. Turn the ignition switch to "ON" position.
3. Check if the DTC is set.
Q: Is the check result satisfactory?

YES:
It can be assumed that this malfunction is intermittent. Refer to
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
.
NO:
Go to Step 3.
STEP 3. Using scan tool MB991958, check data list item 01: interior
temperature sensor.

1. Connect scan tool MB991958 to the data link connector.
2. Start the engine.
3. Check the data list.
Item 01: Interior temperature sensor.
Check that the ambient tem
perature matches the dis
played value on
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 Automatic Air Conditioning - Endeavor

the scan tool.
4. Turn the ignition switch to the "LOCK" (OFF) position.
NOTE: When this DTC is set and the system is fail-safe
status, the value of service data displays 20 °C.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 11: Connecting Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor