IGNITION SWITCH
CHASSIS ELECTRICAL54A-20
ON-VEHICLE SERVICE
HOW TO REGISTER ENCRYPTED CODEM1543008100410
CAUTION
Because registering the encrypted codes is done
after all previously-registered codes have been
erased, you should keep all of the ignition keys
that have already been registered accessible.
If the ignition key, Immobilizer-ECU,
engine-ECU
replaced or an ignition key is added, encrypted
codes of all the ignition keys must be registered. (A
maximum of eight different ignition key can be
registered.) Moreover, when the immobilizer-ECU
has been replaced, you will need to use MUT-II/III to
register the immobilizer-ECU and input the vehicle
secret code and to register the password (secret
code) that the owner specifies into the
immobilizer-ECU.
If an attempt is made to start the engine with an
unregistered ignition key, cranking occurs, but fuel
supply is cut off to disable the engine. In
approximately.
NOTE: Engine-ECU
has an encrypted code for immobilizer-ECU, and the
encrypted code is registered in the immobilizer-ECU
and ignition key.
POINTS TO NOTE DURING OPERATION
If none of the functions can be used, check the
diagnosis codes, and after carrying out any
necessary repairs, repeat the operation.
If an incorrect password is input ten times in a row,
the immobilizer-ECU judges that an unauthorized
operation is being attempted. Start-prevention mode
will be set, and engine operation will stop and all
special functions will be disabled. If the ignition
switch is turned to "ON" position, "Unauthorized
operation, start- prevention mode" will be cancelled.
KEY ID (ENCRYPTED CODE)
REGISTRATION
All ignition keys can be registered with MUT-II.
Additional ignition keys can be registered with
MUT-II.
Registration with the MUT-II
CAUTION
To prevent damage to MUT-II, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting MUT-II.
NOTE: .
•Using the key ID register function will cause all
key IDs that have been previously registered in
the immobilizer-ECU to be erased. All keys need
to be registered. Those which have been
registered before should be on hand before using
this function.
•If registering more than one key, do not
disconnect MUT-II halfway through the
registration process.
•After registering key IDs, check that the engine
can be started using all of the keys that have
been registered. If the engine will not start, refer
to Immobilizer System Diagnosis P.54A-6.
1. Connect MUT-II to diagnosis connector (16- pin).
2. Turn the ignition switch to "ON" position.
3. At "System Select," press "YES"
AC304777
Steering shaft
AB
MB991502
AC000522AD
IGNITION SWITCH
CHASSIS ELECTRICAL54A-22
10.The number of keys currently registered will be
displayed. To register an additional key, replace
the ignition key with the next key to be registered
within five seconds and then press the "YES" key.
Key ID registration screen will be displayed, then
register another key.
If key ID registration is complete, press the "NO"
key.
NOTE: A maximum of eight different keys can be
registered.
11.This completes the registration operation. Turn
the ignition switch "LOCK" (OFF) and leave it off
for approximately ten seconds.
12.Check that the engine can be started with each of
the ignition keys.
13.Check that the immobilizer system diagnosis
code and MPI system diagnosis code did not set.
14.Turn the ignition switch to "LOCK" (OFF) position.
15.Disconnect MUT-II.
Registration of additional keys with the
MUT-II
Additional key(s) can be registered with the MUT-II
while keeping all existing key data.
CAUTION
To prevent damage to MUT-II, always turn the
ignition switch to "LOCK" (OFF) position before
connecting or disconnecting MUT-II.
NOTE: To register additional keys with the MUT-II,
no registered keys must be lost.1. Connect MUT-II (MB991502) to the 16-pin
diagnosis connector.
2. Turn the ignition switch to "ON" position.
3. At "System Select," press "YES"
4. Select "Immobilizer," press "YES".
5. Select "Special Func", press "YES".
If diagnosis code No.11 exists, "Can't execute" will
be displayed. Check for diagnosis code
No.11(Refer to P.54A-9.)
ACX01563ACAC304777
Steering shaft
AB
MB991502
AC000522AD
AC000523AC
AC000530AC
IGNITION SWITCH
CHASSIS ELECTRICAL54A-27
IGNITION SWITCH
REMOVAL AND INSTALLATIONM1543002100434
WARNING
•Before removal of the air bag module, refer to GROUP 52B, SRS Service Precautions and
Air Bag Module and Clock Spring P.52B-5.
•When removing and installing the steering wheel, do not let it bump against the air bag
module.
AC304659
2
3
4
67
15
AB
8
Removal steps
1. Column cover lower
2. Column cover upper
3. Steering wheel and air bag module
assembly (Refer to GROUP 37,
Steering wheel P.37-17 or P.37-19)
4. Clock spring and column switch
assembly (Refer to GROUP 37,
Steering shaft P.37-21)
<>5. Steering lock cylinder•Ignition switch connector
6. Ignition switch
7. Immobilizer-ECU
•Key reminder switch connector
8. Key reminder switch and bulb
assembly Removal steps (Continued)
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
ON-VEHICLE SERVICE
HEATER, AIR CONDITIONER AND VENTILATION55-74
REFRIGERANT LEAK REPAIR
PROCEDURE
M1552001500277
LOST CHARGE
If the system has lost all charge due to a leak:
1. Evacuate the system (Refer to P.55-72).
2. Charge the system with approximately 480 − 520
g of refrigerant.
3. Check for leaks.
4. Discharge the system.
5. Repair leaks.
CAUTION
Replacement filter-drier units must be sealed
while in storage. The drier used in these units will
saturate water quickly upon exposure to the
atmosphere. When installing a drier, have all
tools and supplies ready for quick assembly to
avoid keeping the system open any longer than
necessary.
6. Replace receiver drier.
7. Evacuate and charge system.
LOW CHARGE
If the system has not lost all of its refrigerant charge;
locate and repair all leaks. If it is necessary to
increase the system pressure to find the leak
(because of an especially low charge) add
refrigerant. If it is possible to repair the leak without
discharging the refrigerant system, use the
procedure for correcting low refrigerant level.
HANDLING TUBING AND FITTINGS
Kinks in the refrigerant tubing or sharp bends in the
refrigerant hose lines will greatly reduce the capacity
of the entire system. High pressures are produced in
the system when it is operating. Extreme care must
be exercised to make sure that all connections are
pressure tight. Dirt and moisture can enter the
system when it is opened for repair or replacement of
lines or components. The following precautions must
be observed. The system must be completely
discharged before opening any fitting of connection
in the refrigeration system. Open fittings with caution
even after the system has been discharged. If any
pressure is noticed as a fitting is loosened, allow
trapped pressure to bleed off very slowly.
Never attempt to rebend formed lines to fit. Use the
correct line for the installation you are servicing. A
good rule for the flexible hose lines is keep the radius
of all bends at least 10 times the diameter of the
hose.Sharper bends will reduce the flow of refrigerant. The
flexible hose lines should be routed so that they are
at least 80 mm from the exhaust manifold. It is good
practice to inspect all flexible hose lines at least once
a year to make sure they are in good condition and
properly routed.
On standard plumbing fittings with O-rings, these
O-rings are not reusable.
COMPRESSOR NOISE CHECKM1552008700272
You must first know the conditions when the noise
occurs. These conditions are: weather, vehicle
speed, in gear or neutral, engine temperature or any
other special conditions.
Noises that develop during A/C operation can often
be misleading. For example: what sounds like a
failed front bearing or connecting rod, may be
caused by loose bolts, nuts, mounting brackets, or a
loose clutch assembly. Verify accessory drive belt
tension (power steering or alternator).
Improper accessory drive belt tension can cause a
misleading noise when the compressor is engaged
and little or no noise when the compressor is
disengaged.
Drive belts are speed-sensitive. That is, at different
engine speeds, and depending upon belt tension,
belts can develop unusual noises that are often
mistaken for mechanical problems within the
compressor.
ADJUSTMENT
1. Select a quiet area for testing. Duplicate
conditions as much as possible. Switch the
compressor on and off several times to clearly
identify compressor noise. To duplicate high
ambient conditions (high head pressure), restrict
air flow through the condenser. Install a manifold
gauge set to make sure discharge pressure
doesn't exceed 2,070 kPa.
2. Tighten all compressor mounting bolts, clutch
mounting bolt, and compressor drive belt. Check
to assure clutch coil is tight (no rotation or
wobble).
3. Check refrigerant hoses for rubbing or
interference that can cause unusual noises.
4. Check refrigerant charge (Refer to P.55-69).
5. Recheck compressor noise as in Step 1.
6. If noise still exists, loosen compressor mounting
bolts and retighten. Repeat Step 1.
7. If noise continues, replace compressor and repeat
Step 1.
ON-VEHICLE SERVICE
HEATER, AIR CONDITIONER AND VENTILATION55-76
FAN CONTROL RELAY CONTINUITY
CHECK
IDLE-UP OPERATION CHECK
M1552001600371
1. Before inspection and adjustment, set vehicle in
the following condition:
•Engine coolant temperature: 80 − 90 °C•Lamps, electric cooling fan and accessories: Set
to OFF
•Transmission: Neutral ("N" or "P" for vehicles with
A/T)
•Steering wheel: Straightforward
2. Check whether or not the idle speed is the
standard value. <1300, 1600> Refer to GROUP
13A, On-vehicle Service − Basic Idle Speed
Adjustment P.13A-387.
<2000> Refer to GROUP 13B, On-vehicle Service
− Basic Idle Speed Adjustment P.13B-324.
Standard value: 750 ± 50 r/min
3. When the A/C is running after turning the A/C
switch to ON, and the blower switch to the 3(MH)
or 4(HI) position, check to be sure that the idle
speed is at the standard value.
Standard value: 850 ± 50 r/min
NOTE: It is not necessary to make an adjustment,
because the idling speed is automatically
adjusted by the ISC system. If, however, a
deviation from the standard value occurs for some
reason, check the ISC system.
CLEAN AIR FILTER REPLACEMENT
PROCEDURE
M1552020100030
1. Remove the glove box (Refer to GROUP 52A,
Instrument Panel P.52A-2).
2. Remove the two screws as shown, and replace
the clean air filter.
3. Install the glove box. Battery voltage Tester
connectionSpecified
condition
Not applied 2 − 4 Open circuit
•Connect
terminal 1 to
the positive
battery
terminal
•Connect
terminal 3 to
the negative
battery
terminal2 − 4 Less than 2
ohms
AC305307
Fan control relay
13
4 2
3 4
1 2
AC
AC305114AB
Air filter
Instrument panel