BODY – General / Keyless Entry System42-2
GENERAL
OUTLINE OF CHANGE
The descriptions of the troubleshooting using on MUT-II tester have been incorporated.
KEYLESS ENTRY SYSTEM
SPECIAL TOOL
ToolNumberNameUse
MB991502MUT-II sub assemblyRecording secret codes
TROUBLESHOOTING
INSPECTION CHART FOR TROUBLE SYMPTOMS
Trouble symptomInspection procedure No.Reference page
None of the doors can be locked or unlocked using the transmitter.142-2
All of the doors can be locked and unlocked using the transmitter,
but the room lamp does not flash or illuminate. (However, the room
lamp operates normally when the doors are opened and closed.)242-4
Secret codes cannot be registered.342-4
INSPECTION PROCEDURE FOR TROUBLE SYMPTOMS
INSPECTION PROCEDURE 1
None of the doors can be locked or unlocked using the
transmitter.
Probable cause
The cause may be a malfunction of the transmitter, a malfunction of the receiver
or the lock and unlock signals are not being input to the ETACS-ECU.Malfunction of transmitter
Malfunction of receiver
Malfunction of ETACS-ECU
Malfunction of wiring harness or connector
Malfunction of key reminder switch
Malfunction of door switch
NG
To next page
OK
Replace the transmitter battery. (Refer to P.42-7.)
Ye s
Has the secret code been registered properly? *NGRe-register the secret code. (Refer to P.42-8.)
Can the doors be locked and unlocked by the driver’s-side door
key cylinder and lock knob?NoCheck the centre door lock system.
NOTE
*: This should be done if a transmitter or receiver has been replaced, and if a secret code has not
been registered properly.
BODY – Keyless Entry System42-4
INSPECTION PROCEDURE 2
All of the doors can be locked and unlocked using the
transmitter, but the room lamp does not flash or
illuminate. (However, the room lamp operates normally
when the doors are opened and closed.)
Probable cause
If the room lamp operates normally when the doors are opened and closed, the cause
of the problem may be a malfunction of the receiver or a malfunction of the harness
between the room lamp the receiver.Malfunction of receiver
Malfunction of connector or wiring harness
NG
Repair
NG
Check the harness wire between room lamp and receiver, and
repair if necessary.
OK
Replace the receiver.
OK
Check trouble symptoms.
Measure at the receiver connector D-01.
Disconnect the connector, and measure at the harness side.
Voltage between 11 and body earth
OK:System voltageNGCheck the following connectors:
B-80, D-01
INSPECTION PROCEDURE 3
Secret codes cannot be registered.
Probable cause
The cause may be a malfunction of the diagnosis connector, a malfunction of the
power supply or earth circuit of the receiver, a malfunction of the earth circuit or
a malfunction of the diagnosis output circuit.Malfunction of receiver
Malfunction of MUT-II
Malfunction of connector or wiring harness
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between receiver and diagnosis connector
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between fusible link No.1 and diagnosis connector
OK
Check trouble symptoms.NGCheck the harness wire, and repair if necessary.
Between diagnosis connector and earth
Ye s
To next page
NG
Check the following
connectors:
B-22, B-50NG
Repair
OK
Measure at the diagnosis
connector B-22.
Continuity between 4
and body earth
Continuity between 5
and body earth
OK:ContinuityOKReplace MUT-II.
OK
Check trouble symptoms.
No
Measure at the diagnosis
connector B-22
Voltage between 16
and body earth
OK:System voltageNGCheck the following connectors:
B-22, B-49, B-75
OK
Can the MUT-II communicate with other systems?
OK
Check trouble symptoms.
Measure at the diagnosis connector B-22 and the receiver connector
D-01.
Disconnect the connector, and measure at harness side.
Continuity between following terminals:
OK:Continuity
7
B-22, D-01
BODY – Keyless Entry System42-5
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between fusible link No.1 and receiver
Between ignition switch and receiver
NG
Repair
NG
Check the harness wire, and repair if necessary.
Between receiver and earth
OK
Replace the receiver.
OK
Check trouble symptoms.
OK
Measure at the receiver connector D-01.
Disconnect the connector, and measure at the harness side.
Between 20 and body earth
OK:ContinuityNGCheck the following connectors:
B-50, D-01
OK
Check trouble symptoms.
Measure at the receiver connector D-01.
Disconnect the connector, and measure at the harness side.
Voltage between 9 and body earth
Voltage between 10 and body earth
OK:System voltageNGCheck the following connectors:
B-49, B-75, D-01
From previous page
INSPECTION OF RECEIVER TERMINAL VOLTAGE
TerminalSignal nameConditionsTerminal voltage
2Door switchOne or more doors are open (Door switch: ON)0 V
All doors are closed (Door switch: OFF)System voltage
6Door lock actuator
switch (driver’s side)
LOCK5 V and pulse output*
switch (driver’s side)
UNLOCK0 V
7Diagnosis changeover
input
When MUT-II is connected0 V
input
When MUT-II is disconnectedSystem voltage
8Key reminder switchOFF (When ignition key is inserted)5 V and pulse output*
ON (When ignition key is removed)0 V
9Ignition switchIgnition switch: ACC or ONSystem voltage
Ignition switch: OFF0 V
10Receiver power supplyAt all timesSystem voltage
11Room lamp outputOne or more door are open (Door switch: ON)0 V
All doors are closed (Door switch: OFF)System voltage
BODY – Keyless Entry System42-6
TerminalSignal nameConditionsTerminal voltage
12Door lock outputWhen activated0 V
When not activatedSystem voltage
14Door unlock outputWhen activated0 V
When not activatedSystem voltage
20EarthAt all times0 V
NOTE
Values marked with * should be measured using an oscilloscope. (The value will alternate between 0
V and 0.03 V if a circuit tester is used.)
BODY – Keyless Entry System42-8
ASSEMBLY SERVICE POINTS
ABATTERY INSTALLATION
Install a new battery with (+) side upward.
Battery required for replacement:
Lithium battery CR1216
SECRET CODE REGISTRATION METHOD
Each individual secret code is registered inside
the transmitter, and so it is necessary to register
these codes with the EEPROM inside the receiver
in the following cases.
When either the transmitter or receiver is
replaced;
If it appears that a problem is occurring because
of faulty registration of a code.
A maximum of two different codes can be stored
in the memory area of the EEPROM (two different
transmitters can be used). When the code for the
first transmitter is registered, the previously-regis-
tered codes for two transmitters are cleared.
Therefore, if you are using two transmitters or are
adding a second transmitter, the codes for both
transmitters must be registered at the same time.
Before beginning with the registration, check that
the doors lock normally when the key is used.
1. Connect the MUT-II to the diagnosis connector.
NOTE
This will connect terminal (1) of the diagnosis
connector to earth, and the system will be in
secret code registration standby mode.
Caution
Always turn the ignition switch to OFF before
connecting and disconnecting the MUT-II.
2. Close all the doors.
3. Turn the ignition switch to ACC and then back
to OFF.NOTE
The doors will lock and unlock once at this
time and the system will switch to registration
mode.
4. Press the transmitter switch, and then press
it two times within 10 seconds of the first press.
This will register the code.
5. After registration is completed, the doors will
be automatically locked and unlocked once.
6. If you are using two transmitters or have added
a second transmitter, the same registration
procedure should be carried out for the second
transmitter, and it should be carried out within
one minute after registration of the code for
the first transmitter has been completed. After
the second registration is completed, the doors
will be automatically locked and unlocked once.
7. Registration mode will be cancelled if one of
the following conditions is met.
When the secret codes for two transmitters
have been registered;
When 1 minute has passed after
registration mode started;
If the MUT-II is disconnected (the earth
connection is broken);
If the ignition switch is turned to ON;
If any of the doors are opened;
8. After registration is completed, carry out the
following to check if the keyless entry system
is operable properly.
Remove the ignition key.
Close all the doors.
52B-1
SUPPLEMENTAL
RESTRAINT
SYSTEM (SRS)
CONTENTS
GENERAL INFORMATION 2. . . . . . . . . . . . . . . .
SRS SERVICE PRECAUTIONS 3. . . . . . . . . . .
SPECIAL TOOLS 5. . . . . . . . . . . . . . . . . . . . . . . .
TEST EQUIPMENT 5. . . . . . . . . . . . . . . . . . . . . .
TROUBLESHOOTING 6. . . . . . . . . . . . . . . . . . . .
SRS MAINTENANCE 15. . . . . . . . . . . . . . . . . . .
POST-COLLISION DIAGNOSIS 19. . . . . . . . .
INDIVIDUAL COMPONENT SERVICE 22. . . WARNING/CAUTION LABELS 23. . . . . . . . . .
SRS AIR BAG CONTROL UNIT
(SRS-ECU) 24. . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR BAG MODULES AND CLOCK
SPRING 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AIR BAG MODULE DISPOSAL
PROCEDURES 32. . . . . . . . . . . . . . . . . . . . . . . .
Undeployed Air Bag Module Disposal
Procedures 32. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Deployed Air Bag Module Disposal
Procedures 40. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CAUTION
Carefully read and observe the information in the SERVICE PRECAUTIONS (P.52B-3.) prior to any service.
For information concerning troubleshooting or maintenance, always observe the procedures in the Troubleshooting
(P.52B-6.) section.
If any SRS components are removed or replaced in connection with any service procedures, be sure to follow the
procedures in the INDIVIDUAL COMPONENT SERVICE section (P.52B-22.) for the components involved.
If you have any questions about the SRS, please contact your local distributor.
SRS – General Information52B-2
GENERAL INFORMATION
To improve safety, the SRS is available as optional
part.
The SRS consists of two air bag modules, SRS
air bag control unit (SRS-ECU), SRS warning lamp
and clock spring. One air bag is located in the
centre of the steering wheel and another above
the glove box. Each air bag has a folded air bag
and an inflator unit. The control unit under the floor
console monitors the system and has a safing G
sensor and an analog G sensor. The warning lamp
on the instrument panel indicates the operationalstatus of the SRS. The clock spring is installed
in the steering column.
Only authorized service personnel should do work
on or around the SRS components. Those service
personnel should read this manual carefully before
staring any such work. Extreme care must be used
when servicing the SRS to avoid injury to the service
personnel (by inadvertent deployment of the air
bags) or the driver (by rendering the SRS
inoperative).
Air bag module
(Driver’s side)Clock springAir bag module
(Front passenger’s side)
Diagnosis
connector
SRS-ECU
SRS warning lamp
SRS – SRS Service Precautions52B-3
SRS SERVICE PRECAUTIONS
1. In order to avoid injury to yourself or others
from accidental deployment of the air bag during
servicing, read and carefully follow all the
precautions and procedures described in this
manual.
2. Do not use any electrical test equipment on
or near SRS components, except those
specified on P.52B-5.
3. Never Attempt to Repair the Following
Components:
SRS air bag control unit (SRS-ECU)
Clock Spring
Air Bag Module
(Driver‘s side or front passenger’s side*)NOTE
*: Vehicles with front passenger’s air bag
If any of these components are diagnosed as
faulty, they should only be replaced, in
accordance with the INDIVIDUAL COM-
PONENT SERVICE procedures in this manual,
starting at page 52B-22.
4. After disconnecting the battery cable, wait 60 seconds
or more before proceeding with the following work.
The SRS system is designed to retain enough voltage
to deploy the air bag for a short time even after the
battery has been disconnected, so serious injury may
result from unintended air bag deployment if work
is done on the SRS system immediately after the
battery cables are disconnected.
5. Do not attempt to repair the wiring harness connectors
of the SRS. If any of the connectors are diagnosed as
faulty, replace the wiring harness. If the wires are
diagnosed as faulty, replace or repair the wiring harness
according to the following table.
Battery Insulating tape
SRS-ECU connector