ignition switch trouble shooting MITSUBISHI LANCER 2005 User Guide

54A-1
GROUP 54A
CHASSIS
ELECTRICAL
CONTENTS
BATTERY. . . . . . . . . . . . . . . . . .
54A-4
SERVICE SPECIFICATIONS. . . . .
54A-4
ON-VEHICLE SERVICE. . . . . . . . .54A-4
FLUID LEVEL AND SPECIFIC
GRAVITY CHECK . . . . . . . . . . . . . . . . . 54A-4
CHARGING . . . . . . . . . . . . . . . . . . . . . . 54A-4
BATTERY TEST . . . . . . . . . . . . . . . . . . 54A-5
IGNITION SWITCH* . . . . . . . . . .54A-6
GENERAL INFORMATION . . . . . .
54A-6
SPECIAL TOOLS. . . . . . . . . . . . . .54A-8
TROUBLESHOOTING . . . . . . . . . .54A-9
IGNITION KEY REMINDER BUZZER AND
DOOR LOCK PREVENTION FUNCTION
TROUBLESHOOTING . . . . . . . . . . . . . . 54A-9
IMMOBILIZER SYSTEM
TROUBLESHOOTING . . . . . . . . . .
54A-9
DIAGNOSIS CODE CHART . . . . . . . . . . 54A-9
DIAGNOSTIC TROUBLE CODE
PROCEDURES . . . . . . . . . . . . . . . .
54A-10
SYMPTOM CHART. . . . . . . . . . . . .54A-11
SYMPTOM PROCEDURES . . . . . .54A-12
DATA LIST REFERENCE TABLE .54A-19
CHECK IMMOBILIZER-ECU . . . . .54A-19
ON-VEHICLE SERVICE . . . . . . . . .54A-20
HOW TO REGISTER ENCRYPTED
CODE . . . . . . . . . . . . . . . . . . . . . . . . . . . 54A-20
IGNITION SWITCH . . . . . . . . . . . . . . . . 54A-27
REMOVAL AND INSTALLATION . . . . . . 54A-27
INSPECTION . . . . . . . . . . . . . . . . . . . . . 54A-28
Continued on next page
WARNINGS REGARDING SERVICING OF SUPPLEMENTAL RESTRAINT SYSTEM (SRS) EQUIPPED VEHICLES
WARNING
•Improper service or maintenance of any component of the SRS, or any SRS-related component, can lead to
personal injury or death to service personnel (from inadvertent firing of the air bag) or to the driver and
paassenger (from rendering the SRS inoperative).
•Service or maintenance of any SRS component or SRS-related component must be performed only at an
authorized MITSUBISHI dealer.
•MITSUBISHI dealer personnel must thoroughly review this manual, and especially its GROUP 52B - Supplemental
Restraint System (SRS) before beginning any service or maintenance of any component of the SRS or any
SRS-related component.
NOTE
The SRS includes the following components: SRS air bag control unit, SRS warning light, front impact sensors, air bag module,
clock spring, and interconnecting wiring. Other SRS-related components (that may have to be removed/installed in connection
with SRS service or maintenance) are indicated in the table of contents by an asterisk (*).

IGNITION SWITCH
CHASSIS ELECTRICAL54A-9
TROUBLESHOOTING
IGNITION KEY REMINDER BUZZER AND
DOOR LOCK PREVENTION FUNCTION
TROUBLESHOOTING
M1543000701002
The ignition key reminder buzzers are controlled by
the Smart Wiring System (SWS). For
troubleshooting, refer to respective Groups below.
•Not using SWS monitor: GROUP 54B, SWS
Diagnosis P.54B-38.
•Using SWS monitor: GROUP 54C, SWS
Diagnosis P.54C-22.
IMMOBILIZER SYSTEM
TROUBLESHOOTING
DIAGNOSIS CODE CHARTM1543007100417
CAUTION
During diagnosis, a diagnosis 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 diagnosis code code(s). If diagnosis
code code(s) are set, erase them all.
Use the following chart to develop proper diagnostic
strategy. MB991223
A: MB991219
B: MB991220
C: MB991221
D: MB991222Harness set
A: Test harness
B: LED harness
C: LED harness
adapter
D: ProbeMaking voltage and
resistance measurements
during troubleshooting
A: Connect pin contact
pressure inspection
B: Power circuit inspection
C: Power circuit inspection
D: Commercial tester
connection Tool Number Name Use
MB991223
A
B
C
D
AC
Diagnosis code No. Diagnosis item Reference page
11 Transponder communication system or radio interference
of encrypted codeP.54A-10.
12 Encrypted codes are not the same or are not registered
P.54A-11.

IGNITION SWITCH
CHASSIS ELECTRICAL54A-10
DIAGNOSTIC TROUBLE CODE
PROCEDURES
Code No.11: Transponder Communication System or Radio Interference of Encrypted Code
DIAGNOSIS CODE SET CONDITION
•Diagnosis code No.11 may be set 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: Diagnosis code No.11 is always set together
with MPI system diagnosis code No.P0513.TROUBLESHOOTING HINTS
•Radio interference of the encrypted code.
•Malfunction of the transponder.
•Malfunction of the immobilizer-ECU.
HIGH-FREQUENCY
CIRCUIT IMMOBILIZER-ECU
IGNITION KEY
IGNITION KEY
RING ANTENNA
Ignition Key Ring and Immobilizer-ECU Circuit

IGNITION SWITCH
CHASSIS ELECTRICAL54A-11
DIAGNOSIS PROCEDURE
STEP 1. Check for presence of other key near the
key in the ignition.
Q: Is there any other key near the key in the ignition?
YES :
Move the other key well away from key
being used. Retest the system.
NO : Go to Step 2.
STEP 2. Check that the engine start using the
spare ignition key which encrypted code has
been registered.
Q: Does the engine start using the spare ignition key
for which the encrypted code has been registered?
YES :
Replace the ignition key that does not work.
Then register the password (secret code)
and encrypted code P.54A-20. Retest the
system.
NO : Go to Step 3.
STEP 3. Check whether the diagnosis code is
reset.
Q: Which diagnosis code is set, code No.11 or 12 the
encrypted code has been registered?
Code No.12 is set :
Refer toP.54A-11.
Code No.11 is set : Go to Step 4.
STEP 4. Connector check: Immobilizer-ECU
connector C-202-1.
Q: Are immobilizer-ECU connector C-202-1 in good
condition?
YES :
Replace immobilizer-ECU and Then
register the password (secret cod) and
encrypted code P.54A-20. Retest the
system.
NO : Repair or replace the damage
component(s).
Code No.12: Encrypted Codes are Not identical or not Registered
DIAGNOSIS CODE SET CONDITION
The encrypted code sent by the transponder is not
the same encrypted code which is registered in the
immobilizer-ECU.
NOTE: Diagnosis code No.12 is always set together
with MPI system diagnosis code No.P0513.
TROUBLESHOOTING HINTS
•The encrypted code in the ignition key has not
been properly registered.•Malfunction of immobilizer-ECU.
DIAGNOSIS PROCEDURE
Was the encrypted code registered?
YES :
Replace the immobilizer-ECU and then
re-register the encrypted code (Refer to
P.54A-20).
NO : Register the encrypted code (Refer to
P.54A-20).
SYMPTOM CHARTM1543007201075
AC303806
Connector: C-202-1
Harness side
AF
Symptom Inspection
procedure No.Reference page
Communication with MUT-II/III is impossible. 1
P.54A-12
The ignition key cannot be registered. 2
P.54A-18
Engine does not start (cranking but no initial combustion). 3
P.54A-18

IGNITION SWITCH
CHASSIS ELECTRICAL54A-13
TROUBLESHOOTING HINTS
•Malfunction of the immobilizer-ECU.
•Malfunction of the engine-ECU or
engine-A/T-ECU .
•The wiring harness or connectors may have
loose, corroded, or damaged terminals, or
terminals pushed back in the connector.
DIAGNOSIS PROCEDURE
STEP 1. Check if MUT-II/III can communicate with
the MPI system and if an MPI system diagnosis
code other than P0513 is set.
Q: Can MUT-II/III communicate with the MPI system?
Is an MPI system diagnosis code other than P0513
set?
YES :
Go to Step 2.
NO : Refer to GROUP 13A, MPI Diagnosis
P.13A-15, GROUP 13B, MPI Diagnosis
P.13B-15.
STEP 2. Voltage measurement at
immobilizer-ECU connector C-202-1.
(1) Disconnect immobilizer-ECU connector C-202-1.
(2) Turn the ignition switch to the "ON" position.
(3) Measure the voltage between terminal 1 and
earth.
OK: System voltage
Q: Is the check result normal?
YES :
Go to Step 5.
NO : Go to Step 3.
STEP 3. Connector check: Immobilizer-ECU
connector C-202-1 and engine control relay
connector B-16X
Q: Are immobilizer-ECU connector C-202-1 and
engine control relay connector B-16X in good
condition?
YES :
Go to Step 4.
NO : Repair or replace the damaged
component(s). Confirm that MUT-II/III
communicates normally.AC303806
Connector: C-202-1
Harness side
AF
AC304844AB
Connector C-202-1
(Harness side)
AC303806
Connector: C-202-1
Harness side
AF
AC303796
Connector: B-16X
Harness side
AF

IGNITION SWITCH
CHASSIS ELECTRICAL54A-17
NOTE:
Prior to the wiring harness inspection, check key
reminder switch connector C-202, intermediate
connector C-13 , C-137 drive vehicles>, and repair if necessary.Q: Are the harness wires between immobilizer-ECU
connector C-202-1 (terminal 3) and engine-ECU
connector C-127 (terminal 51) or
engine-A/T-ECU connector C-128 (terminal 111)
in good condition?
YES :
Go to Step 10.
NO : Repair or replace the damaged
component(s). Confirm that MUT-II/III
communicates normally.
STEP 10. Replace the immobilizer-ECU or
engine-ECU or engine-A/T-ECU .
Replace the immobilizer-ECU.
Q: Did the communication with MUT-II/III become
possible after replacing the immobilizer-ECU?
YES :
Register the password (secret code) and
encrypted code P.54A-20. Confirm that
MUT-II/III 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 GROUP 00, How to Use
Troubleshooting/Inspection Service Points −
How to Cope with Intermittent Malfunction
P.00-5).
NO : Replace the engine-ECU or
engine-A/T-ECU .
AC303800
Connector: C-13

Harness side
AG
AC303818
AM
Connector: C-137

Harness side
AC303806
Connector: C-202
Harness side
AG

IGNITION SWITCH
CHASSIS ELECTRICAL54A-18
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 PROCEDURE
STEP 1. MUT-II/III diagnosis code.
Q: Does diagnosis code No.11 reset?
YES :
Refer to P.54A-9.
NO : Replace the ignition key that cannot be
registered. Then re-register the encrypted
code. (Refer to P.54A-20). Verify that the
ignition key can be registered, then Go to
Step 2.
STEP 2. Retest the system.
Q: Does registered ignition key function properly?
YES :
The procedure is complete. (If no
malfunctions are found in all steps, an
intermittent malfunction is suspected. Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service Points −
How to Cope with Intermittent Malfunction
P.00-5).
NO : Replace the immobilizer-ECU.
INSPECTION PROCEDURE 3: Engine does not Start (Cranking but no Initial Combustion).
TECHNICAL DESCRIPTION (COMMENT)
If the fuel injectors are not operating, there might be
a problem with the MPI system in addition to a
malfunction of the immobilizer system. It is normal for
this to occur if an attempt is made to start the engine
using a key that has not been properly registered.
TROUBLESHOOTING HINTS
•Malfunction of MPI system
•Malfunction of immobilizer-ECU
DIAGNOSIS PROCEDURE
STEP 1. Check the system voltage.
Measure the system voltage during cranking.
Q: Is the voltage 8 volts or more?
YES :
Go to Step 2.
NO : Check the battery. Refer to P.54A-4. The
engine should start.
STEP 2. Check the immobilizer system diagnosis
code and MPI system diagnosis code.
Q: Which diagnosis code resets, the immobilizer
system diagnosis code or the MPI system
diagnosis code?
Immobilizer system diagnosis code is set :
Refer
to P.54A-9.
MPI system diagnosis code is set : Refer to
GROUP 13A, Diagnosis P.13A-15, GROUP
13B, Diagnosis P.13B-15.
No diagnosis code is set : Go to Step 3.
STEP 3. Check the starting system.
Q: Does the engine start?
YES :
Go to Step 4.
NO : Refer to GROUP 13A, Diagnosis −
Symptom Chart P.13A-215, GROUP 13B,
Diagnosis − Symptom Chart P.13B-189. If
the malfunction is not resolved, replace the
immobilizer-ECU. Then register the
password (secret code) and encrypted
code. (Refer to P.54A-20.) The engine
should start.

IGNITION SWITCH
CHASSIS ELECTRICAL54A-19
STEP 4. Retest the system
Q: Is the malfunction eliminated?
YES :
The procedure is complete. If no
malfunction are not found in all steps, an
intermittent malfunction is suspected (Refer
to GROUP 00, How to Use
Troubleshooting/Inspection Service
Points-How to Cope with Intermittent
Malfunction P.00-5).
NO : Replace the immobilizer-ECU.
DATA LIST REFERENCE TABLEM1543007300314
CHECK IMMOBILIZER-ECUM1543007600489
TERMINAL VOLTAGE CHECK TABLE
Item No. Inspection item Inspection
requirementNormal condition
01 Key has been registered
−Number of registered ignition keys
AC304799
Terminal No. Signal Inspection condition Terminal voltage
1 Immobilizer-ECU power supply Ignition switch: "LOCK"
(OFF) 0V
Ignition switch: "ON" System voltage
2- - -
3 Engine-ECU or
engine-A/T-ECU--
4 Immobilizer-ECU earth Always 0V

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-33
TECHNICAL DESCRIPTION (COMMENT)
The engine-ECU and its associated components, the
combination meter assembly, the wiring harness, or
the connector(s) may be defective.
TROUBLESHOOTING HINTS
•Malfunction of the vehicle speed sensor
•Malfunction of the engine-ECU
•Malfunction of the combination meter assembly
•The wiring harness or connectors may have
loose, corroded, or damaged terminals, or
terminals pushed back in the connector.
DIAGNOSIS PROCEDURE
STEP 1. MUT-II/III actuator test.
(1) Connect the MUT-II/III to the diagnosis connector.(2) Use the MUT-II/III to enter simulated vehicle
speed.
Q: Does the speedometer show that simulated vehicle
speed?
YES :
Go to Step 6.
NO : Go to Step 2.
STEP 2. Check the vehicle speed sensor.
(MUT-II/III diagnosis code)
(1) Connect MUT-II/III to the diagnosis connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the MPI system diagnosis code.
Q: Is MPI system diagnosis code P0500 set?
YES :
Refer to P.13A-186 <4G1> or P.13B-166
<4G6>.
NO : Go to Step 3.
AC304777
Steering shaft
AB
MB991502

AC304950
MB991911
16-PIN
MB991827 MB991824
AB

AC304777
Steering shaft
AB
MB991502

AC304950
MB991911
16-PIN
MB991827 MB991824
AB

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-38
TECHNICAL DESCRIPTION (COMMENT)
The engine-ECU and its associated components, the
combination meter assembly, the wiring harness, or
the connector(s) may be defective.
TROUBLESHOOTING HINTS
•Malfunction of the vehicle speed sensor
•Malfunction of the engine-ECU
•Malfunction of the combination meter assembly
•The wiring harness or connectors may have
loose, corroded, or damaged terminals, or
terminals pushed back in the connector.
DIAGNOSIS PROCEDURE
STEP 1. MUT-II/III actuator test
(1) Connect the MUT-II/III to the diagnosis connector.(2) Use the MUT-II/III to enter simulated vehicle
speed.
Q: Does the speedometer show that simulated vehicle
speed?
YES :
Go to Step 6.
NO : Go to Step 2.
STEP 2. Check the output shaft speed sensor.
(MUT-II/III diagnosis code)
(1) Connect MUT-II/III to the diagnosis connector.
(2) Turn the ignition switch to the "ON" position.
(3) Read the automatic transmission system
diagnosis code.
Q: Is automatic transmission system diagnosis code
23 set?
YES :
Refer to P.23A-38.
NO : Go to Step 3.
AC304777
Steering shaft
AB
MB991502

AC304950
MB991911
16-PIN
MB991827 MB991824
AB

AC304777
Steering shaft
AB
MB991502

AC304950
MB991911
16-PIN
MB991827 MB991824
AB