Immobilizer and or key ring antenna MITSUBISHI ENDEAVOR 2004 Service Repair Manual

2004 BODY & ACCESSORIES
Ignition Switch - Endeavor
IGNITION SWITCH GENERAL DESCRIPTION < UP TO DECEMBER 2003 > IGNITION KEY REMINDER TONE ALARM The ignition key reminder tone alarm will sound under the following condition, and
warn the driver to remove the ignition key.
The driver's door is opened when the ignition switch is at "LOCK" (OFF) or
"ACC" position without removing the ignition key.
However, the light reminder tone alarm will take precedence over this function.
DOOR LOCK PREVENTION FUNCTION If the key is left in the ignition switch while the driver's door opened or the assistant
door opened, all door are automatically unlock to prevent locking the ignition key
in the vehicle after door is locked. IMMOBILIZER SYSTEM The immobilizer system consists of the ignition key, the immobilizer-ECU with key
ring antenna, and the PCM. The ignition key has a built-in transponder. Only the
registered ignition key permits the engine to start, therefore, the engine can never be
started by 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
).

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


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

Fig. 2: Identifying PCM Table

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
GENERAL DESCRIPTION < FROM TO JANUARY 2004 > IGNITION KEY REMINDER TONE ALARM The ignition key reminder tone alarm will sound under the following condition, and
warn the driver to remove the ignition key.
The driver's door is opened when the ignition switch is at "LOCK" (OFF) or
"ACC" position without removing the ignition key.
However, the light reminder tone alarm will take precedence over this function.
DOOR LOCK PREVENTION FUNCTION If the key is left in the ignition switch while the driver's door opened or the assistant
door opened, all door are automatically unlock to prevent locking the ignition key
in the vehicle after door is locked. IMMOBILIZER SYSTEM The immobilizer system consists of the ignition key, the key ring antenna,
immobilizer-ECU, and the PCM. The ignition key has a built-in transponder. The
key ring antenna is installed on the steering lock cylinder. Only the registered
ignition ke
y permits the en
gine to start
, therefore
, the en
gine can never be started b
y

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

components may be defective. If the immobilizer system has immobilized the
engine, MFI system DTC P0513 will be output. In this case, observe the
immobilizer system troubleshooting. INTRODUCTION TO IMMOBILIZER SYSTEM DIAGNOSIS < FROM TO JANUARY 2004 > The immobilizer system consists of the immobilizer-ECU, PCM, ignition key and
ignition key ring antenna. If the engine cannot be started by using a registered
ignition key, one of these components may be defective. If the immobilizer system
has immobilized the engine, MFI system DTC P0513 will be output. In this case,
observe the immobilizer system troubleshooting. IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY Use the following steps to plan your diagnostic strategy.
1. Gather information about the problem from the customer.
2. Verify that the condition as described by the customer exists.
3. Check the vehicle for any immobilizer system DTCs.
4. If you cannot verify the condition and there are no immobilizer system DTCs,
the malfunction is intermittent. Refer to HOW TO COPE WITH
INTERMITTENT MALFUNCTIONS
.
5. If you can verify the condition but there are no immobilizer system DTCs, or
the system cannot communicate with scan tool MB991958, refer to
SYMPTOM CHART AND FIND THE FAULT
.
6. If there is an immobilizer system DTC, record the DTC, then erase it from the
memory using scan tool MB991958.
7. Recreate the immobilizer system DTC set conditions to see if the same
immobilizer system DTC will resets.
1. If the same immobilizer system DTC resets, perform the appropriate
diagnostic procedure. Refer to DIAGNOSTIC TROUBLE CODE
CHART
.
2. If the same immobilizer s
ystem DTC does not reset
, the malfunction is
CAUTION: The encrypted code should always be re-registered
when replacing the immobilizer-ECU.

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

Fig. 10: Ignition Key Ring And Immobilizer
-ECU Circuit Diagram &
Connector Identification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CIRCUIT OPERATION The ignition key is powered by the ignition key ring antenna. The ignition key then
sends an encrypted code. The ignition key ring antenna receives the encrypted code,
and determines if the ignition key is registered.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor

Fig. 12: Ignition Key Ring and Immobilizer
-ECU Circuit Diagram &
Connector Identification

Courtesy of MITSUBISHI MOTOR SALES OF AMERICA.
CIRCUIT OPERATION The ignition key is powered by the ignition key ring antenna. The ignition key then
sends an encrypted code. The ignition key ring antenna receives the encrypted code,
and determines if the ignition key is registered. DTC SET CONDITION
DTC 11 may be output if other ignition keys are in the vicinity of the vehicle
as it is being started. The transponder's encrypted code is not sent to the immobilizer-ECU
immediately after the ignition switch is turned to "ON" position.
NOTE: DTC 11 is always output together with MFI system DTC
P0513.
2004 Mitsubishi Endeavor LS
2004 BODY & ACCESSORIES Ignition Switch - Endeavor