Sensor MITSUBISHI ENDEAVOR 2004 Service Repair Manual

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.
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

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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

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.
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

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.
Q: Is the sensor within the specified range?

YES:
It can be assumed that this malfunction is intermittent. Refer to
HOW TO USE TROUBLESHOOTING/INSPECTION SERVICE POINTS
. Then go to Step 7 .
NO:
Go to Step 4.
STEP 4. Check A/C-ECU connector C-16, C-17 and interior temperature
sensor connector C-120 for loose, corroded or damaged terminals, or
terminals pushed back in the connector
.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 13: Identifying Connector C
-120

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Q: Are A/C-ECU connector C-16, C-17 and interior temperature sensor
connector C-120 in good condition?

YES:
Go to Step 5.
NO:
Repair or replace the connector. Refer to
HARNESS
CONNECTOR INSPECTION
. Then go to Step 7 .
STEP 5. Check the wiring harness between A/C-ECU connector C-16
(terminals 20), C-17 (terminals 22) and interior temperature sensor
connector C-120 (terminals 1 and 2)
.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 15: Identifying Connectors C
-104 And C
-120

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Q: Are the wiring harnesses between A/C-ECU connector C-16 (terminals
20), C-17 (terminals 22) and interior temperature sensor connector C-120
(terminals 1 and 2) in good condition?

YES:
Go to Step 6.
NO:
Repair the wiring harness. Then go to Step 7 .
STEP 6. Check the interior temperature sensor.

1. Disconnect interior tem
perature sensor connector C-120.
NOTE: Also check joint connector C-104 for loose, corroded,
or damaged terminals, or terminals pushed back in the
connector. If joint connector C-104 is damaged, repair
or replace the connector as described in HARNESS
CONNECTOR INSPECTION
.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 16: Identifying Connector C
-120

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2. When the resistance between the sensor terminals is measured under two
or more temperature conditions, the resistance should approximately
satisfy the illustrated values.
NOTE: The temperature conditions when checking should
not exceed the range shown in the diagram.

2004 Mitsubishi Endeavor LS
2004 HVAC Automatic Air Conditioning - Endeavor

Fig. 17: Temperature Resistance Graph

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Q: Is the interior temperature sensor in good condition?

YES:
Replace the A/C-ECU. Then go to Step 7.
NO:
Replace the interior temperature sensor. 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 Automatic Air Conditioning - Endeavor