TOYOTA CAMRY 1999 Service Repair Manual

AB0119H01304H01305
LOCKAirbag Sensor Assembly
Tc
(+)
(±)
± DIAGNOSTICSSUPPLEMENTAL RESTRAINT SYSTEM
DI±799
1034 Author: Date:
If the DTC is displayed without a DTC check procedure, perform the following
troubleshooting.
1 Check resistance between terminal Tc of airbag sensor assembly and body
ground.
PREPARATION:
(a) Turn ignition switch to LOCK.
(b) Disconnect negative (±) terminal cable from the battery,
and wait at least for 90 seconds.
(c) Disconnect the airbag sensor assembly connector.
CHECK:
Check resistance between terminal Tc of the airbag sensor as-
sembly connector and body ground.
OK:
Resistance: 1 MW or Higher
NG Repair or replace harness or connector.
OK
Replace airbag sensor assembly.

DI05L±03
Vehicle Brought to Workshop
Customer Problem Analysis
Circuit Inspection
Symptom Simulation
Identification of Problem
Confirmation TestEND
1
23
4
7
Repair5
6
DI±801
IN±21
DI±809
Problem Symptom Confirmation
Diagnostic Procedure
Transmitter Inspection
Transmitter Malfunction
Titles inside are titles of pages in
this manual, with the page number indicated
in the bottom position. See the indicated
pages for detailed explanations.
Some functions of wireless door lock
control system do not operate Whole wireless
door lock control
system does not
operate
DI±802
DI±802
DI±810
8
Problem Symptoms Table DI±800
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1035 Author: Date:
WIRELESS DOOR LOCK CONTROL SYSTEM
HOW TO PROCEED WITH TROUBLESHOOTING
HINT:
Troubleshooting of the wireless door lock control system is based on the premise that the door lock control
system is operating normally. Accordingly, before troubleshooting the wireless door lock control system, first
make certain that the door lock control system is operating normally.
Perform troubleshooting in accodnce with procedure on the following page.

DI05M±02
WIRELESS DOOR LOCK CONTROL System Check Sheet
Customer 's Name
Registration No.
Registration Year
Frame No.
Odometer ReadingInspector 's
Name
km
Miles //
//
// Date Vehicle Brought In
Date Problem First Occurred
Frequency Problem Occurs
Weather Conditions
When Problem Oc-
curred
Date Transmitter Battery Last ReplacedWeather
Outdoor Temperature
PlaceConstant Sometimes ( times per day, month)
Once only
Fine
Cloudy Rainy Snowy
Various/Others
HotWarm Cool
Cold (Approx. °F ( °C))
EverywhereSpecific Locality( )
//
Problem Symptom
Whole wireless door lock control system does not operate.
Only door unlock operation is not possible.
Only door lock operation is not possible.
Only key confinement prevention function is not possible.
Wireless door lock function operates even each door is opened.
Wireless door lock functions incorrectly.
( Although one door is unlocked, when the transmit-
ter switch is pressed, all doors become unlocked.)When Front RH door is unlocked
When Front LH door is unlocked
When Rear RH door is unlocked
When Rear LH door is unlocked
Others
Only PANIC operation is not possible.
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±801
1036 Author: Date:
CUSTOMER PROBLEM ANALYSIS CHECK

DI05N±03
N13160
N13161
I00239
DI±802
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1037 Author: Date:
PRE±CHECK
1. INSPECT TRANSMITTER
1 Check the transmitter operation.
HINT:
This inspection is not directly for the purpose of checking the ca-
paciy of the transmitter battery, but is performed when remote
control operation becomes difficult or impossible, in order to as-
certain if this is caused by low battery capacity.
PREPARATION:
(a) Using a screwdriver, pry outward the cover.
(b) Remove the battery.
CHECK:
(a) Connect 4 new 1.5±V dry±cell batteries in series. Con-
nect the battery
terminal to the battery receptacle side
terminal and the battery  terminal to the bottom terminal
to provide 6 V to the transmitter.
(b) Push the wireless door lock remote control switch on the
side of the transmitter body and operate the door lock by
remote control.
OK:
Remote control operation is possible.
OK Replace the battery for transmitter.
(See page DI±802)
NG
Replace transmitter and registration of rec-
ognition code. (See page DI±802)

I00306
Destroy
Transmitter
EPROM
ECU
ECU
TransmitterNew Parts
Registration
of recogition
code.
N13157
New Part
Dispose of
I00307
Registration
of recogition
codeDestory ECU New Parts
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±803
1038 Author: Date:
2. REPLACE WIRELESS DOOR LOCK ECU AND TRANS-
MITTER
HINT:
Disassembly and assembly of the transmitter includes details
of spare parts and replacement procedure for detective parts
found through troubleshooting.
Each part is a precision electronic component so handle with
care.
(a) Spare parts and replacement procedure for malfunction-
ing parts (transmitter malfunction):
(1) Prepare a new transmitter.
(2) Registration of recogition code.
(3) Check that door lock remote control operation
works.
(b) Spare parts and replacement procedure for malfunction-
ing parts (battery malfunction):
(1) Prepare a new battery.
(2) Remove the battery from transmitter.
(3) Install a new battery into transmitter.
(c) Spare parts and replacement procedure for malfunction-
ing parts (ECU malfunction):
(1) Prepare a new ECU.
(2) Remove the ECU from the vehicle.
(3) Install a new ECU in the vehicle.
(4) Registration of recogition code.

N13159
N13160
I08491
GND
PRG
PRG
GND
Wireless Door
Lock ECU
Remote Control Mirror
Switch Connector
DI±804
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1039 Author: Date:
(d) Replace the battery for transmitter.
(1) Using a screwdriver, pry outward the cover.
(2) Remove the battery.
(3) Set a new battery into the transmitter.
(4) Install the cover to the transmitter.
3. REGISTRATION OF RECOGNITION CODE
The recognition code of the transmitter is electronically regis-
tered (written to and stored) in an EEPROM contained in the
wireless door lock ECU. This makes it possible to register up to
2 different codes in the EEPROM.
New recognition codes can be registered after all previous
codes have been erased. A transmitter code can be registered
into the EEPROM by following the steps numbered (1) to (5).
(1) The wireless door lock ECU and remote control mir-
ror switch are connected to each other via a PRG
terminal, and the GND terminal of the remote con-
trol mirror switch connector is grounded to body.
Remove the connector from the remote control mir-
ror switch, and use a test lead to short the PRG and
GND connector together. As a result, the PRG ter-
minal of the wireless door lock ECU will be
grounded to body and will cause all transmitter rec-
ognition codes previously registered in the EE-
PROM to be erased. At the same time, the ECU will
respond by operating once the lock and unlock
functions of all the doors, and the open function of
the trunk lid.

Start
Unlock all doors manually
Insert key in ignition key cylinder and open driver's doorHINT: Diagnostic mode may be exited
at any time by ungrounding terminal 9
Ground terminal 9 of the wireless door lock ECU and
wait more 1 second.
Remove key from ignition key cylinder and close
driver 's door within 10 seconds.
Press any button on transmitter within 10 seconds.If not performing this operation
within 10 seconds after the
above operation, the mode will
not change into the diagnostic
mode.
If not performing this operation
within 10 seconds after the
above operation, the mode will
not change into the diagnostic
mode.
CONTINUED ON NEXT PAGE
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±805
1040 Author: Date:
(2) A transmitter recognition code is registered by
pressing any single button of the transmitter to be
registered. Once the code is registered, the ECU
responds again by operating once the lock and un-
lock functions of all the doors.
(3) To register the recognition code of an additional
transmitter, follow the procedure shown in (2).
(4) After completing the registration of the codes, re-
move the test lead from the remote control mirror
switch connector terminals to allow the system to
revert to the normal operation.
(5) Using the registered transmitter, verify that the sys-
tem operates properly.
4. DIAGNOSTIC PROCEDURE

Does each
door lock
knob oper-
ate?No
Ye sRF (ECU failure) DATA reception
error (Transmitter of ECU failure)
Exit diagnostic mode, and check
transmitter batteries.
If bad, replace batteries and go to
start.
If not starting, replace transmitter and
go to
start.
Door lock motor of all the doors
operate to lock side 1 time. Door lock motor of all the doors
operate to lock side 3 times.
Valid recognition code received
Motor feedback failure
Diagnostic check OK
Check motor feedback for input
line to receiver:
If bad, fix wiring or replace motor.
Other wise, replace receiver and go to start.How does
it opetate?
If still not starting, replace ECU and
go to start.
DI±806
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1041 Author: Date:

DI05O±03
I00217
I00216
I00215
I00241
Ignition Switch
Key Unlock Warning Switch
Wireless Door Lock ECU
Transmitter
Instrument Panel Junction Block
Integration Relay
Engine Room Junction Block

Door Lock Motor

Door Unlock Detection
Switch
Door Courtesy Switch
DOME FuseDoor Key Lock and Unlock Switch

Door Lock Motor

Door Unlock
Detection Switch
Door Lock Motor

Door Unlock
Detection Switch
Door Courtesy Switch
Door Courtesy Switch
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±807
1042 Author: Date:
PARTS LOCATION

DI1KR±03
I00227
1 2
63 74
8 5
9 10 11 12 13 14 15
DI±808
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1043 Author: Date:
TERMINALS OF ECU
Symbols (Terminals No.)Wiring ColorConditionSTD Voltage (V)
1 ± Ground (GND ± Ground )W ± BAlways.Below 1 V
4 G d(TAIL G d)GRTAIL lamps ºONºBelow 1 V4 ± Ground ( TAIL ± Ground )G ± RTAIL lamps ºOFFº10 ± 14 V
5 G d ( PINI G d )LGAlways.4 ± 6 V5 ± Ground ( PINI ± Ground )LGPush the PANIC switch.Below 1.5 V
7 G d(UL3 G d)RG
Door key lock and unlock switch ºUNLOCKº.
(Driver's Door)Below 1.5 V
7 ± Ground ( UL3 ± Ground )R ± GDoor key lock and unlock switch ºOFFº or ºLOCKº.
(Driver's Door)8 ± 10 V
8 ± 1 (+B ± E )RAlways.10 ± 14 V
9 ± Ground (PRG ± Ground )VIgnition switch ºONº10 ± 14 V
10 ± Ground (KSW ± Ground )L ± B
Key unlock warning switch ºONº.
(Key is inserted into key cylinder)Below 1 V10 Ground (KSW Ground )L B
Key unlock warning switch ºOFFº.10 ± 14 V
11 G d (LSWD G d)LR
Door unlock detection switch ºONº.
(Driver's Door)Below 1 V
11 ± Ground (LSWD ± Ground)L ± RDoor unlock detection switch ºOFFº.
(Driver's Door)10 ± 14 V
12 G d (LSWP G d)Y
Door unlock detection switch ºONº.
(Passenger's Door)Below 1 V
12 ± Ground (LSWP ± Ground)YDoor unlock detection switch ºOFFº.
(Passenger's Door)10 ± 14 V
13 G d(LSWR G d)LY
Door unlock detection switch ºONº.
(Either Rear Door)Below 1 V
13 ± Ground(LSWR ± Ground)L ± YDoor unlock detection switch ºOFFº.
(All Rear Doors)10 ± 14 V
14 G d (CTY G d )RWDoor courtesy switch ºONºBelow 1 V14 ± Ground (CTY ± Ground )R ± WDoor courtesy switch ºOFFº10 ± 14 V
15 G d (L G d )LWDoor key lock and unlock switch ºLOCKºBelow 1 V15 ± Ground (L ± Ground )L ± WDoor key lock and unlock switch ºOFFº or ºUNLOCKº8 ± 10 V