MITSUBISHI ENDEAVOR 2004 Service Repair Manual

Fig. 22: Identifying Connectors

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CIRCUIT OPERATION The Immobilizer-ECU is energized by the MFI relay when the ignition switch is
turned "ON". The PCM transmits a signal from scan tool MB991958 to the
immobilizer-ECU as it is. In the same way, a signal from the immobilizer-ECU is
also transmitted to scan tool MB991958 as it is. TECHNICAL DESCRIPTION (COMMENT)
This malfunction may be caused by a defective immobilizer-ECU, PCM, or a
defect in the communication line between the immobilizer-ECU and PCM. If
this malfunction appears when the MFI system and scan tool MB991958 can
communicate each other, MFI system DTC P0513 will reset. If the MFI system is normal, the MFI relay can be determined as normal. In
addition, if the MFI system and scan tool MB991958 can communicate each
other, the circuits between the data link connecto
r and the PCM can determined

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

as normal.
TROUBLESHOOTING HINTS
Malfunction of the immobilizer-ECU Malfunction of the PCM The wiring harness or connectors may have loose, corroded, or damaged
terminals, or terminals pushed back in the connector
DIAGNOSIS Required Special Tools:
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)
MB991223: Harness Set
STEP 1. Using scan toll MB991958, read the MFI system diagnostic
trouble code.
Use scan tool MB991958 to confirm the MFI system DTC.
1. Connect scan tool MB991958 to the data link connec
tor.
NOTE: If this malfunction appears, MFI system DTC P0513 will
be set.
CAUTION: To prevent damage to scan tool MB991958,
always turn the ignition switch to "LOCK" (OFF)
position before connecting or disconnecting
scan tool.

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 23: Connecting Scan Tool MB991958 To Data Link Connector

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

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.
2. Turn the ignition switch "ON" to position.
3. Read the MFI system diagnosis code.
Q: Can scan tool MB991958 communicate with the MFI system? Is an
MFI system DTC other than P0513 set?
YES: Go to Step 2.
NO: Refer to MULTIPORT FUEL INJECTION (MFI) DIAGNOSIS
,
.
STEP 2. Measure the voltage at immobilizer-ECU connector C-310-1.
1. Disconnect immobilizer-ECU connector C-310-1.
Fig. 24: Identifying Connector C
-310
-1
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y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

2. Turn the ignition switch to the "ON" position.
3. Measure the voltage between terminal 5 and ground.
Fig. 25: Measuring Voltage

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Q: Is battery voltage (approximately 12 volts) present?
YES: Go to Step 5.
NO: Go to Step 3.
STEP 3. Check immobilizer-ECU connector C-310-1 and MFI relay
connector B-15X for loose, corroded or damaged terminals, or terminals
pushed back in the connector.

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 26: Identifying Connector B
-15X

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2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 27: Identifying Connector C
-310
-1
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Q: Are immobilizer-ECU connector C-310-1 and MFI relay connector B-
15X in good condition?
YES: Go to Step 4.
NO: Repair or replace the damaged component(s). Confirm that scan tool
MB991958 communicates normally.
STEP 4. Check the harness wires between immobilizer-ECU connector C-
310-1 (terminal 5) and MFI relay connector B-15X (terminal 4).

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 28: Identifying Connector B
-15X

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y of MITSUBISHI MOTOR SALES OF AMERICA
.

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 29: Identifying Connector C
-310
-1
Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
NOTE: Also check intermediate connector A-13 and C-31, and
key reminder switch connector C-310 for loose,
corroded, or damaged terminals, or terminals pushed
back in the connector. If intermediate connector A-13 or
C-31, or key reminder switch connector C-310 is
damaged, Repair or replace the damaged component
(s).

2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 30: Identifying Connector A
-13
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2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor