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IGNITION SWITCH
CHASSIS ELECTRICAL54A-26
5. Enter the vehicles password (secret code) on the
"Transponder ID addition" screen, and then click
the check mark icon.
6. If an additional registration is made successfully,
the screen will ask if another key is registered or
not. If the third ignition key is registered, remove
the key, which has been registered. Then insert
the third key within five seconds, and then turn it
to the ON position.
7. Register the additional ignition key according to
step 6 above. The number of the registered
ignition keys are shown on "The number of
registered key" screen.
NOTE: A maximum of eight different keys can be
registered.
8. This completes the registration operation. Turn
the ignition switch "LOCK" (OFF) and leave it off
for approximately ten seconds.
9. Check that the engine can be started with each of
the ignition keys.
10.Check that the immobilizer system diagnosis
code and MPI system diagnosis code did not set.
11.If not diagnosis code is shown, terminate the
MUT-III.
12.Turn the ignition switch to "LOCK" (OFF) position.
13.Disconnect MUT-III.Registration of additional key(s) without
using the MUT-III
If the MUT-III is not available, new key(s) can be
registered by operating two keys which have been
registered to the vehicle (A maximum of eight keys
can be registered to one vehicle). Follow the
procedure below to register new key(s) to the
vehicle.
NOTE: The registered key is the key that allows you
to start the engine.
1. Turn "ON" the ignition switch by using the first
registered key (key A), and wait for five seconds.
2. Remove the first registered key (key A).
3. Insert the second registered ignition key (key B),
and turn it to the ON position.
4. The immobilizer-ECU identifies the new key to
accept or reject it, and operates the immobilizer
indicator (See the table below).
5. If a new ignition key is registered further, repeat
steps 1 to 7 above.
A maximum of eight ignition keys can be registered
to one vehicle (If you attempt to register the ninth
key, the immobilizer-ECU rejects the key). If any of
the following conditions are satisfied, the additional
key registration mode will terminate:
•The ignition switch has been on for more than 30
seconds.
•After the ignition key has been turned to the
"LOCK" (OFF), the engine control relay is turned
off.
•The MUT-III has started communicating with
vehicle systems.
6. After the registration mode has terminated, the
additionally registered key(s) should allow you to
start the engine.
AC207301
AC209775POWERTRAIN IMMOBILIZER
Key ID registerey ID registerThe number of registered keyThe number of registered key3
Progre
Progre
Special FunctionTrasponder ID addition
About Additional TAbout Additional TransponderransponderID SETID SETIf register another key ID, press theIf register another key ID, press theOK button after inserting a new keyOK button after inserting a new keywithin 5 sec and turning on IG-SWwithin 5 sec and turning on IG-SW.

IGNITION SWITCH
CHASSIS ELECTRICAL54A-28
REMOVAL SERVICE POINT
<> STEERING LOCK CYLINDER
REMOVAL
1. Insert the key in the steering lock cylinder and turn
it to the "ACC" position.
2. Using a small Phillips head screwdriver, pull the
steering lock cylinder toward you.
INSPECTIONM1544009700203
IGNITION SWITCH CONTINUITY CHECK
Disconnect ignition switch connector C-201 without
removing the ignition switch. Then check the
continuity.
KEY REMINDER SWITCH CONTINUITY
CHECK
Disconnect key reminder switch connector C-202
without removing the ignition switch and key
reminder switch. Then check the continuity.
AC304831AB
Locking pin
AC304833AB
Switch
position Tester
connectionSpecified
condition
"LOCK" (OFF) 1 − 2, 1 − 3,
1 − 4, 1− 5,
1 − 6, 2 − 3,
2 − 4, 2− 5,
2 − 6, 3 − 4,
3 − 5, 3 − 6,
4 − 5, 4 − 6,
5 − 6Open circuit
"ACC" 1 − 6 Less than 2
ohms
"ON" 1 − 2, 1 − 4,
1 − 6, 2 − 4,
2 − 6, 4 − 6Less than 2
ohms
"START" 1 − 2, 1 − 5,
2 − 5Less than 2
ohms
Status of
ignition keyTester
connectionSpecified
condition
Removed 4 − 6 Less than 2
ohms
Inserted 4 − 6 Open circuit
AC304834AB

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-34
STEP 3. Connector check: Combination meter
connector C-04 and diagnosis connector C-11.
Q: Is combination meter connector C-04 and
diagnosis connector C-11 in good condition?
YES :
Go to Step 4.
NO : Repair or replace the damage
component(s).
STEP 4. Check the wiring harness between
combination meter connector C-04 (terminal 12)
and diagnosis connector C-11 (terminal 14).
NOTE:
Prior to the wiring harness inspection, joint connector
C-03 , and repair if necessary.
Q: Is the wiring harness between combination meter
connector C-04 (terminal 12) and diagnosis
connector C-11 (terminal 14) in good condition?
YES :
Go to Step 5.
NO : Repair or replace the wiring harness.
AC303798
Connector: C-04

Harness side
AT
AC303800
C-11 (B) Connector: C-11

Front side
AK
AC303814
Connector: C-04

Harness side
AT
AC303812
AD
Connector: C-11

Front side
C-11 (B)
AC303798AU
Connector: C-03, C-04
C-04
C-03 (B)
C-04 C-03 Harness side
AC303800
C-11 (B) Connector: C-11

Front side
AK
AC303814
Connector: C-04

Harness side
AT
AC303812
AD
Connector: C-11

Front side
C-11 (B)

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-35
STEP 5. Retest the system
Q: Is the speedometer normal?
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 combination meter assembly.
STEP 6. Check whether the diagnosis code is
reset.
Q: Is the MPI-related diagnosis code set?
YES :
Refer to GROUP 13A − Troubleshooting
P.13A-15, GROUP 13B − Troubleshooting
P.13B-15.
NO : . Go to Step 7.
STEP 7. Connector check: Combination meter
connector C-04 and engine-ECU connector C-127

Q: Is combination meter connector C-04 and
engine-ECU connector C-127 in good condition?
YES : .
Go to Step 8.
NO : . Repair or replace the damage
component(s).
STEP 8. Check the wiring harness between
combination meter connector C-04 (terminal 11)
and engine-ECU connector C-125 vehicles>, C-127 (terminal
58).
AC303798
Connector: C-04

Harness side
AT
AC303814
Connector: C-04

Harness side
AT
AC303816BA
Connector: C-127
C-127 (Y)
Harness side
AC303798
Connector: C-04

Harness side
AT
AC303804
Connector: C-125

C-125 (Y)
Harness side
51 52 53 54 55 56 57 58
66 65 64 63 62 61 60 59
AT

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-36
NOTE:
Prior to the wiring harness inspection, check
intermediate connectors C-14 (LH drive vehicles),
C-136 (RH drive vehicles), joint connectors C-12 (LH
drive vehicles), C-134 (RH drive vehicles) and repair
if necessary.
Q: Is the wiring harness between combination meter
connector C-04 (terminal 11) and engine-ECU
connector C-127 (terminal 58)
in good condition?
YES :
Go to Step 9.
NO : Repair the wiring harness.
STEP 9. Retest the system.
Q: Is the speedometer normal?
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 : Go to Step 10.
STEP 10. Pulse check
Use the MUT-II/III or a voltmeter to check that the
vehicle speed signal is received.
OK: The MUT-II/III sounds or the voltmeter
needle fluctuates.
Q: Is the check result normal?
YES :
Replace the combination meter assembly.
NO : Replace the engine-ECU.
AC303814
Connector: C-04

Harness side
AT
AC303816AW
Connector: C-127

C-127 (Y)
Harness side
585261556256605459535751
AC303801
Connector: C-12, C-14

C-12C-14 (GR)
C-12
C-14 Harness side
AD
System switch Check conditions
Vehicle speed signal When the vehicle speed
has reached 10 km/h or
more

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

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-39
STEP 3. Connector check: Combination meter
connector C-04 and diagnosis connector C-11
Q: Is combination meter connector C-04 and
diagnosis connector C-11 in good condition?
YES :
Go to Step 4.
NO : Repair or replace the damage
component(s).
STEP 4. Check the wiring harness between
combination meter connector C-04 (terminal 12)
and diagnosis connector C-11 (terminal 14).
NOTE:
Prior to the wiring harness inspection, joint connector
C-03 , and repair if necessary.
Q: Is the wiring harness between combination meter
connector C-04 (terminal 12) and diagnosis
connector C-11 (terminal 14) in good condition?
YES :
Go to Step 5.
NO : Repair or replace the wiring harness.
AC303798
Connector: C-04

Harness side
AT
AC303800
C-11 (B) Connector: C-11

Front side
AH
AC303814
Connector: C-04

Harness side
AT
AC303812
AD
Connector: C-11

Front side
C-11 (B)
AC303798AU
Connector: C-03, C-04
C-04
C-03 (B)
C-04 C-03 Harness side
AC303800
C-11 (B) Connector: C-11

Front side
AH
AC303814
Connector: C-04

Harness side
AT
AC303812
AD
Connector: C-11

Front side
C-11 (B)

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-40
STEP 5. Retest the system.
Q: Is the speedometer normal?
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 combination meter assembly.
STEP 6. Check whether the diagnosis code is
reset.
Q: Is the MPI-related diagnosis code set?
YES : .
Refer to GROUP 13A − Troubleshooting
P.13A-15, GROUP 13B − Troubleshooting
P.13B-15.
NO : . Go to Step 7.
STEP 7. Connector check: Combination meter
connector C-04 and engine-A/T-ECU connector
C-124, C-126
AC303798
Connector: C-04

Harness side
AT
AC303805
Connector: C-124, C-126

C-124 (GR)C-126 (GR)
C-124
C-126 Harness side
41 42 43 44 45
57 56 55 54 53 52 51 50 49 48 47
58 59 60 61 62 63 64 65 6646
71 72 73 74 75 76 77
89 88 87 86 85 84 83 82 81 80 79 78
90 91 92 93 94 95 96 97 98
AK

COMBINATION METER ASSEMBLY
CHASSIS ELECTRICAL54A-42
STEP 8. Check the wiring harness between
combination meter connector C-04 (terminal 11,
12) and engine-A/T-ECU connector C-124 drive vehicles>, C-126
(terminal 43, 80).
AC303798AU
Connector: C-03, C-04
C-04
C-03 (B)
C-04 C-03 Harness side
AC303805
Connector: C-124, C-126

C-124 (GR)C-126 (GR)
C-124
C-126 Harness side
41 42 43 44 45
57 56 55 54 53 52 51 50 49 48 47
58 59 60 61 62 63 64 65 6646
71 72 73 74 75 76 77
89 88 87 86 85 84 83 82 81 80 79 78
90 91 92 93 94 95 96 97 98
AK
AC303814
Connector: C-04

Harness side
AT
AC303817
Connector: C-124, C-126

C-124
C-126
C-126 (GR)
C-124 (GR)
Harness side
41 42 43 44 45
57 56 55 54 53 52 51 50 49 48 47
58 59 60 61 62 63 64 65 6646
71 72 73 74 75 76 77
89 88 87 86 85 84 83 82 81 80 79 78
90 91 92 93 94 95 96 97 98
AM