TOYOTA CAMRY 1999 Service Repair Manual

DI05Q±03
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±809
1044 Author: Date:
PROBLEM SYMPTOMS TABLE
Perform troubleshooting of the circuit for the applicable problem symptom in the order given in the chart be-
low. Proceed to the page located for each circuit.
HINT:

Troubleshooting of the wireless door lock control system is based on the premise that the door lock
control system and theft deterrent system are operating normally. Accordingly, before troubleshooting
the wireless door lock control system, first make certain that the door lock control system and theft de-
terrent system are operating normally.

If the instruction ºProceed to next circuit inspection shown on matrix chartº is given in the flow chart
for each circuit, proceed to the circuit with the next highest number in the table to continue the check.

If the trouble still reappears even through there are no abnormalities in any of the other circuits, check
and replace the Wireless Door Lock ECU as the last step.
SymptomSuspect AreaSee page
All functions of wireless door lock control system do no operate.
3. ECU Power Source Circuit.
4. Door Courtesy Switch Circuit.
5. Door Key Lock and Unlock Switch Circuit.
(Unlock Side)
6. Door Key Lock and Unlock Switch Circuit.
(Lock Side)
7. Key Unlock Warning Switch Circuit.
8. Wireless Door Lock ECU.DI±810
DI±821
DI±815
DI±817

DI±819
IN±31
Only door unlock operation is not possible (Lock operation is pos-
sible).
1. Door Key Lock and Unlock Switch Circuit
(Unlock Side)
2. Door Unlock Detection Switch Circuit
3. Wireless Door Lock ECU.DI±815
DI±819
IN±31
Only door lock operation is not possible (Unlock operation is pos-
sible).1. Door Key Lock and Unlock Switch Circuit
(Lock Side)
2. Wireless Door Lock ECUDI±817
IN±31
Only key confinement prevention function is not possible.1. Key Unlock Warning Switch Circuit
2. Wireless Door Lock ECUDI±819
IN±31

Wireless door lock function operates even when each door is
opened.

Automatic lock function operates even if any door is opened
within 30 seconds after all doors are unlocked by wireless door
lock control system.
1. Door Courtesy Switch Circuit
2. Wireless Door Lock ECUDI±821
IN±31
Wireless door lock functions incorrectly.
(Although one door is unlocked, when the transmitter switch is
pressed, all doors are unlocked.)1. Door Unlock Detection Switch Circuit
2. Wireless Door Lock ECUDI±813
IN±31
Warning operation will not be performed even if the panic button is
pressed.1. Panic Circuit
2. Wireless Door Lock ECUDI±823
IN±31

DI05R±03
I00225
Wireless Door Lock ECU
SHORT PIN
2A2J
DOME Engine Room J/B No.2
FL BLOCK
BatteryRR± J16J17
W±BJ5
A
GND B±G1
B12
FL MAIN
A
IF R
RED 1
1
1 1
8
12 R±YDIODE(DOME) 1W
1G
R8 Instrument
panel J/B F6
F4
J/C
W±B DI±810
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1045 Author: Date:
CIRCUIT INSPECTION
ECU Power Source Circuit
CIRCUIT DESCRIPTION
Battery positive voltage is always applied to the terminal +B of the wireless door lock ECU.
WIRING DIAGRAM

N14677
AB0117
N14690
I00242
LOCK
E(±)
+B(+)
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±811
1046 Author: Date:
INSPECTION PROCEDURE
1 Check DOME fuse.
PREPARATION:
Remove DOME fuse from engine room junction block.
CHECK:
Check continuity of DOME fuse.
OK:
Below 1.0 W or continuity
NG Check for short in all the harness and compo-
nents connected to DOME fuse.
(See attached wiring diagram.)
OK
2 Check voltage between terminals +B and E of wireless door lock ECU connector.
PREPARATION:
Remove the wireless door lock ECU from No.1 instrument pan-
el brace.
CHECK:
Measure voltage between terminals +B and GND of wireless
door lock ECU.
OK:
Voltage: 10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±809).
NG

DI±812
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1047 Author: Date:
3 Check for open in harness and connector between terminal GND of wireless
door lock ECU and body ground (See page IN±31).
NG Repair or replace harness or connector.
OK
Check and repair harness and connector between wireless door lock control ECU and battery.

I08425
Theft Deterrent ECU
LSWD14
T4
LSWP
LSWR15
T4
16
T4Wireless Door
Lock ECU
W±B
*2
Door Unlock Detection
Switch Rear RH IE
Instrument Panel J/B J6
J/C
F
1111
L±RF
F
YL±R
LSWD
LSWP
LSWR W6
12
W6
13
W6 L±R L±R
IE1
Door Unlock Detection
Switch Rear LHDoor Unlock Detection
Switch Front RH Door Unlock
Detection Switch
Front LH
W±B*1W±B*1J38
20
W±B
J/C A
A
1
3 243 2
3 23 2 IE1
W±B3C
L±YE
J101V7
1GJ37 J/C
C
CY
Y Y11
IM1
1*1
4*2
W±B*1J39
J/CW±B*1
A
A
IM1 20
W±B
BN
IJ
IK L±Y J/C
D
J9
D J9 EJ10
L±Y L±Y L±Y
L±YL±Y L±Y
4
BO12
IF23
IN24
BP14
1
W±BW±B6
BP1
4 1
W±B
W±B6
BO1J40
J/CBL
4*1
1*2
*1: TMC Made
*2: TMMK Made W±BW±B
*2
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±813
1048 Author: Date:
Door Unlock Detection Switch Circuit
CIRCUIT DESCRIPTION
The door unlock detection switch is built into the door lock motor assembly. The switch is OFF when the
door lock knob is in Lock position, and is ON When the Knob is in Unlock position.
Furthermore, the door unlock detection switch circuit has terminal +B connected inside the theft deterrent
ECU, when the door unlock detection switch is OFF, battery positive voltage is applied to the terminal of the
door unlock detection switch circuit of the wireless door lock ECU.
WIRING DIAGRAM
DI05S±03

I00273
N14691
I00243
LSWR(+)
LSWD(+)
LSWP(+)
DI±814
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1049 Author: Date:
INSPECTION PROCEDURE
1 Check voltage between terminals LSWD, LSWP and LSWR of wireless door lock
ECU connector and body ground.
PREPARATION:
Remove the wireless door lock ECU from No.1 instrument pan-
el brace.
CHECK:
Measure voltage between each of terminals LSWD, LSWP and
LSWR of wireless door lock ECU connector and body ground,
when the respective door lock knobs involved are pushed to the
lock side.
OK:
Voltage 10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±809).
NG
Check and repair harness and connector between wireless door lock ECU and door unlock
detection switch.

I08426
Wireless Door Lock ECU
Theft Deterrent ECU Integration Relay
UL3 R±G9
T4 I18
UL2 10
T4 UL27
W6R±G R±GI18
B
J6
J/C
3
IE1
74*1
19*25*1
20*2
B
B
B
R±G
R±G
Instrument Panel J/B
1G3
1V
IE 20J37 J/C
RH
J38 W±B
IE1
J/C AA W±B
*3W±B*3
W±B*4
32
UNLOCK LOCK
Door Key
Lock and
Unlock
SwitchLL
L AA
A
3IM1
32
1
UNLOCK LOCK
L
J39
J/C AA W±B
*3W±B*3
W±B*4
20 IM1W±B
1LH
IJ *1: w/o Theft Deterrent System
*2: w/ Theft Deterrent System
*3: TMC Made
*4: TMMK Made
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±815
1050 Author: Date:
Door Key Lock and Unlock Switch Circuit (Unlock Side)
CIRCUIT DESCRIPTION
The Key±operated switch is built into the door key cylinder. When the key is turned to the lock side, the lock
terminal of the switch is grounded, and when the key is turned to the unlock side the unlock terminal is
grounded.
Furthermore, the door key lock and unlock switch circuit has terminal +B connected inside the theft deterrent
ECU, when neither the lock nor unlock terminal of the key lock and unlock switch are grounded, battery posi-
tive voltage is applied to the door key lock and unlock switch circuit of the wireless door lock ECU.
( Tr inside the ECU coming ON causes the wireless door lock ECU to output a signal to unlock all the doors.)
WIRING DIAGRAM
DI05T±03

I00300
UL2(+)
DI±816
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1051 Author: Date:
INSPECTION PROCEDURE
1 Check voltage between terminals UL2 of wireless door lock ECU connector and
body ground.
PREPARATION:
Remove the wireless door lock ECU from No.1 instrument pan-
el brace.
CHECK:
Measure voltage between terminal UL2 of wireless door lock
ECU connector and body ground.
OK:
Voltage: 10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±809).
NG
Check and repair harness and connector between wireless door lock ECU and door key lock and
unlock switch.

I08427
Wireless Door Lock ECUIntegration Relay
L2 8
T4 I18
L15
W6
BJ37
J/C
4
IE1
7B
B B
1G3
1V
IE 20RH
J38 W±B
IE1
J/C AA W±B
*3W±B*3
W±B*4
32
UNLOCK LOCK
Door Key
Lock and
Unlock
Switch4
IM1
32
1
UNLOCK LOCK
L±W
J39
J/C A
A W±B
*3W±B*3
W±B*4
20 IM1W±B
1LH
IJ*1: w/o Theft Deterrent System
*2: w/ Theft Deterrent System
*3: TMC Made
*4: TMMK Made
Theft Deterrent ECU
W±B Instrument Panel J/BL±W
L±W
L±W L±W3
*1
18*2
B L±W
L±W
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI±817
1052 Author: Date:
Door Key Lock and Unlock Switch Circuit (Lock Side)
CIRCUIT DESCRIPTION
Refer to page DI±815.
Tr inside the wireless door lock ECU coming ON causes the theft deterrent ECU to output a signal to lock
all the doors.
WIRING DIAGRAM
DI05U±03

N14693
L(+)
DI±818
± DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1053 Author: Date:
INSPECTION PROCEDURE
1 Check voltage between terminal L of wireless door lock ECU connector and
body ground.
PREPARATION:
Remove the wireless door lock ECU from No.1 instrument pan-
el brace.
CHECK:
Measure voltage between terminal L of wireless door lock ECU
connector and body ground.
OK:
Voltage 10 ± 14 V
OK Proceed to next circuit inspection shown on
problem symptoms table (See page DI±809).
NG
Check and repair harness and connector between wireless door lock ECU and door key lock and
unlock switch.