Mitsubishi Galant. Manual - part 614
IGNITION SWITCH
TSB Revision
CHASSIS ELECTRICAL
54A-9
When the driver's door is closed (door switch OFF)
the ignition key hole illumination light will go out 30
seconds after the door has been closed.
(The light goes out immediately if the door is locked
through the keyless entry function.)
immobilizer system
The immobilizer system consists of the ignition key,
the key ring antenna, the immobilizer-ECU, and the
PCM. The ignition key has a built-in transponder. The
key ring antenna is installed on the steering lock key
cylinder. 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 the ignition key is
lost or another ignition key is added, the encrypted
code can be registered or erased by using scan tool
MB991502.
EQUIPMENT DIAGNOSIS
IGNITION SWITCH DIAGNOSIS
M1543000700281
The Ignition key reminder torn alarms are controlled
by the Simplified Wiring System (SWS). For
troubleshooting, refer to GROUP 54B, SWS
Diagnosis
INTRODUCTION TO IMMOBILIZER SYSTEM DIAGNOSIS
M1543009900301
CAUTION
•
The encrypted code should always be re-registered when replacing the immobilizer-ECU.
•
If the immobilizer-ECU has been replaced with a new part, the password (vehicle secret code)
which has been stored in the immobilizer-ECU for each vehicle will be replaced by a new
password (secret code) specified by the customer.
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. In addition, if the immobilizer
system has immobilized the engine, MFI system
DTC P1610 will be output. In this case, observe the
immobilizer system troubleshooting. Then, if a
malfunction is resolved, the MFI system DTC P1610
should not reset.
IMMOBILIZER SYSTEM DIAGNOSTIC TROUBLESHOOTING STRATEGY
M1543006900175
Use these steps to plan your diagnostic strategy. If
you follow them carefully, you will be sure that you
have exhausted most of the possible ways to find an
immobilizer system fault.
1. Gather information about the problem from the
customer.
2. Verify that the condition described by the
customer exists.
3. Check the vehicle for any immobilizer system
DTC.
4. If you cannot verify the condition and there are no
immobilizer system DTCs, the malfunction is
intermittent. Refer to GROUP 00, How to Use
Troubleshooting/inspection Service Points
−
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, refer to Symptom
Chart and find the fault
6. If there is an immobilizer system DTC, record the
number of the DTC, then erase the DTC from the
memory using scan tool.
7. Recreate the immobilizer system DTC set
conditions to see if the same immobilizer system
DTC will set again.
(1) If the same immobilizer system DTC sets
again, perform the diagnostic procedures for
the DTC. Refer to Diagnostic Trouble Code
Chart
(2) If you cannot get the same immobilizer system
DTC to set again, the malfunction is
intermittent. Refer to GROUP 00, How to Use
Troubleshooting/inspection Service Points
−
How to Cope with Intermittent Malfunctions