2004 MITSUBISHI ENDEAVOR service

By operating two ignition keys that have been already registered (Refer to ON
-
VEHICLE SERVICE
).
OPERATION 1. When the ignition switch is turned to "ON" position, the PCM sends a
requirement for the encrypted code to the immobilizer-ECU (at this time, the
engine is remobilized).
2. When the immobilizer-ECU receives the requirement from the PCM, the
immobilizer-ECU supplies power to the transponder inside the ignition key via
the antenna. The energized transponder sends the encrypted code back to the
immobilizer-ECU via the antenna.
3. The immobilizer-ECU judges the encrypted code with its code logic in itself. If
they are identical, the immobilizer-ECU sends the encrypted code to the PCM.
4. If the PCM can not receive the encrypted code, the engine will be immobilized.
Fig. 1: Identifying PCM Operating Diagram

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CAUTION WHEN REPLACING IMMOBILIZER SYSTEM RELATED PARTS To replace immobilizer system related parts, refer to the table below. When the
ignition key is re-registered with scan tool MB991958, the originally registered
ignition key registration information will be lost.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

means of a forged key or by connecting the ignition wiring directly. The system is
significantly safe and reliable against theft. In addition, the driver has only to turn
the ignition switch to the "ON" position to activate the immobilizer system. If the
requirements for starting the engine are not satisfied, the engine will be
immobilized. If a registered ignition key is lost, all your ignition keys need to be
registered again using scan tool MB991958 (MUT-III Sub Assembly) to ensure
security (Refer to ON
-VEHICLE SERVICE
). An additional ignition key can be
registered as follows (only if no ignition keys are lost):
Using scan tool MB991958 (MUT-III Sub Assembly) (Refer to ON
-
VEHICLE SERVICE
).
By operating two ignition keys that have been already registered (Refer toON
-
VEHICLE SERVICE
).
OPERATION 1. When the ignition switch is turned to "ON" position, the PCM sends a
requirement for the encrypted code to the immobilizer-ECU (at this time, the
engine is remobilized).
2. When the immobilizer-ECU receives the requirement from the PCM, the
immobilizer-ECU supplies power to the transponder inside the ignition key via
the antenna. The energized transponder sends the encrypted code back to the
immobilizer-ECU via the antenna.
3. The immobilizer-ECU judges the encrypted code with its code logic in itself. If
they are identical, the immobilizer-ECU sends the encrypted code to the PCM.
4. If the PCM can not receive the encrypted code, the engine will be immobilized.
Fig. 3: Identifying Immobilizer System Operation Diagram
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
2. Turn the ignition switch to the "ON" position.
3. Use scan tool MB991958 to check immobilizer system diagnostic trouble
codes.
4. Turn the ignition switch to "LOCK" (OFF) position.
5. Disconnect scan tool MB991958.
Q: Which DTC is set, DTC 11 or 12?
DTC12 is set : Refer to DTC 12 DTC 12: ENCRYPTED CODES ARE
NOT THE SAME OR NOT REGISTERED
.
DTC11 is set : Replace the immobilizer-ECU. Then register the password
(secret code) and encrypted code ON
-VEHICLE SERVICE
. Retest the
system.
DTC 11: Trans
ponder Communication S
ystem or Radio Interference of Encr
ypted Code. < FROM TO JANUARY 2004
>

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

Fig. 19: Identifying Connector C310

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
Q: Are the wiring harness between immobilizer-ECU connector C-39
(terminal 7 and 8) and key reminder switch connector C-312 (terminal 7
and 3) in good condition?
YES: Replace the immobilizer-ECU and then register the password
(secret code) and encrypted code (Refer to ON
-VEHICLE SERVICE
).
Retest the system.
NO: Repair or replace the damaged component(s). Confirm that scan tool
MB991958 communicates normally.
DTC 12: ENCRYPTED CODES ARE NOT THE SAME OR NOT REGISTERED DTC SET CONDITION The encr
ypted code sent b
y the trans
ponder is not the same encr
ypted code which is

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

registered in the immobilizer-ECU. TROUBLESHOOTING HINTS
The encrypted code in the ignition key has not been properly registered Malfunction of immobilizer-ECU
DIAGNOSIS Was the encrypted code registered?
YES: Replace the immobilizer-ECU and then re-register the encrypted code
(Refer to ON
-VEHICLE SERVICE
).
NO: Register the encrypted code (Refer to ON
-VEHICLE SERVICE
).
SYMPTOM CHART NOTE: DTC 12 is always output together with MFI system DTC
P0513.
CAUTION: During diagnosis, a DTC code associated with other
system may be set when the ignition switch is turned
on with connector(s) disconnected. On completion,
confirm all systems for DTC code(s). If DTC code(s)
are set, erase them all.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

VEHICLE SERVICE
. Confirm that scan tool MB991958 communicates
normally
NO: Go to Step 11.
STEP 11. Recheck for malfunction.
Q: Is a malfunction eliminated?
YES: The procedure is complete. (If no malfunctions are found in all
steps, an intermittent malfunction is suspected. Refer to HOW TO COPE
WITH INTERMITTENT MALFUNCTIONS
).
NO: Replace the immobilizer-ECU or PCM.
INSPECTION PROCEDURE 1: COMMUNICATION WITH SCAN TOOL MB991958 IS IMPOSSIBLE. < FROM TO
JANUARY 2004 >
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

YES: Register the password (secret code) and encrypted code ON
-
VEHICLE SERVICE
.
NO: Replace the PCM. Then register the password (secret code) and
encrypted code (Refer to ON
-VEHICLE SERVICE
).
INSPECTION PROCEDURE 2: THE IGNITION KEY CANNOT BE REGISTERED TECHNICAL DESCRIPTION (COMMENT) The ignition key transponder or the immobilizer-ECU is suspected to be defective. TROUBLESHOOTING HINTS
Malfunction of the ignition key Malfunction of immobilizer-ECU
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)
STEP 1. Using scan tool MB991958, read the diagnostic trouble code.
Use scan tool MB991958 to check if DTC 11 is set.
1. Connect scan tool MB991958 to the data link connec
tor.
CAUTION: To prevent damage to scan tool MB991958,
always turn the ignition switch to "LOCK" (OFF)
position before connecting or disconnecting
scan tool MB991958.

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

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA
.
2. Turn the ignition switch "ON" position.
3. Read the diagnosis code.
Q: Have any MFI system DTCs set?
YES: Refer to DIAGNOSTIC TROUBLE CODE CHART
.
NO: Go to Step 4.
STEP 4. Attempt to start the engine.
Q: Does the engine start?
YES: The procedure is complete (If no malfunctions are found in all steps,
an intermittent malfunction is suspected. Refer to HOW TO COPE
WITH INTERMITTENT MALFUNCTIONS
).
NO: Refer to SYMPTOM CHART
. If the malfunction is not resolved,
replace the immobilizer-ECU. Then register the password (secret code)
and encrypted code. (Refer to ON
-VEHICLE SERVICE
.) The engine
should now start.
INSPECTION PROCEDURE 4: THE IMMOBILIZER INDICATOR LIGHT DOES NOT ILLUMINATE. < UP TO
DECEMBER 2003
>

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