Page 1769 of 3115
DIB5T-01
DI-946
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1139 Author: Date:
2004 LAND CRUISER (RM1071U)
DIAGNOSTIC TROUBLE CODE CHART
If a malfunction code is displayed during DTC check, check the circuit corresponding to the code in the table
below (Proceed to the page given for the circuit).
DTC No.
(See Page)Circuit InspectionTrouble Area
B1242
(DI-949)Wireless door lock tuner circuit malfunction
Wire harness
Wireless door lock tuner (door control receiver)
Theft deterrent ECU
Page 1770 of 3115

DI0DQ-13
Vehicle Brought to Workshop
Customer Problem Analysis
Circuit Inspection
Symptom Simulation
Identification of Problem
Confirmation TestEND
1
23
4
8
Repair5
7
P. DI-937
P. IN-26
P. DI-948
Problem Symptom Confirmation
Precheck
Transmitter Inspection
Problem Symptoms Table
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
P. DI-938
P. DI-951 - DI-951
9
System is Normal
Malfunction on
vehicle side
6
Transmitter Malfunction
P. BE-100
DI-936
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1129 Author: Date:
2004 LAND CRUISER (RM1071U)
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.
Page 1771 of 3115
DI3CN-03
I25815
Transmitter:Door Key Lock and
Unlock Switch Front Door Lock Assembly
Front Door Lock Motor
Front Door Unlock Detection SwitchRear Door Lock Assembly
Rear Door Lock Motor
Rear Door Unlock Detection Switch
Front Door Lock Assembly
Front Door Lock Motor
Front Door Unlock
Detection Switch
Rear Door Lock Assembly
Rear Door Lock Motor
Rear Door Unlock
Detection Switch
Ignition Switch
Wireless Door Lock ECU
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI-947
1140 Author: Date:
2004 LAND CRUISER (RM1071U)
PARTS LOCATION
Page 1772 of 3115

DI89V-02
I20790
Key Plate Inserted
ON
OFFWithin. 5secs.
1 Key Plate Not Inserted
23 910Within. 30secs.
Once 9 times DI-938
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1131 Author: Date:
PRE-CHECK
1. CHARACTERS OF WIRELESS DOOR LOCK
(a) The operation distance changes according to how cus-
tomers hold the transmitter or where it is used.
(b) Because of using the very weak radio wave, if there is a
strong wave or noise on the frequency being used, the op-
eration distance may become shorter.
2. WIRELESS DOOR LOCK BASIC FUNCTION
(a) Stand on the driver's side. Stay 1 m away from the ve-
hicle.
(b) Turn the transmitter toward the vehicle and press any one
of the transmission switched for 1 sec.
3. INSPECT WIRELESS DOOR LOCK DIAGNOSIS MODE
(a) Start up diagnosis mode.
HINT:
Follow the method below.
(1) Insert the ignition key into the ignition key cylinder.
(2) Remove the ignition key from the ignition key cylin-
der.
(3) Insert the key into the ignition switch.
(4) Turn the ignition switch ON once within 5 sec.
(5) Repeat turning the ignition switch OFF " ON 9
times within 30 sec.
(6) Enter the diagnosis mode, and make sure that the
taillight lights up.
(b) Finishing the Diagnosis Mode.
During the Diagnosis mode, turn the ignition switch OFF
" ON to go back to the normal mode.
At this time make sure that the taillight lights up.
Page 1773 of 3115

I20456
(1) LOCK switch
(2) UNLOCK switch
(3) Luggage door switch
(4) Disagreement of recognition code or
rolling code.
0.13secs.
0.5secs.
0.13secs. 0.25secs. 0.5secs.
0.5secs. 0.5secs.
OFF ON
OFF ON
OFF ON
OFF ON
While receiving
I04149
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI-939
1132 Author: Date:
(c) Diagnosis Mode Check.
HINT:
Check how the taillight lights up when pressing each transmitter
switch.
(1) LOCK switch
(2) UNLOCK switch
(3) Luggage door switch
(4) Disagreement of recognition code or rolling code.
HINT:
If (4) is detected in the Diagnosis Check, conduct the recogni-
tion code registration.
(5) No response from the taillight.
HINT:
Conduct the following checks.
Wireless door lock transmitter.
Wireless door lock receiver.
4. INSPECT WIRELESS DOOR LOCK TRANSMITTER
OPERATION
HINT:
Refer to º3. REPLACE TRANSMITTER (LITHIUM) BATTERYº.
(a) Using a screwdriver, remove the 2 screws and cover.
(b) Remove the battery (lithium battery).
(c) Install a new or normal battery (lithium battery).
HINT:
When a new or normal battery can not be obtained, connect 2
new 1.5 V batteries in series, connect the battery (+) to the bat-
tery receptacle side terminal and battery (-) to the bottom termi-
nal, then apply 3 V voltage to the transmitter.
(d) In the location where is approx. 1 m away from driver's
outside handle in the right direction, face the key plate of
the transmitter to the vehicle, and check the transmitter
operation when pressing transmission switch of the trans-
mitter body.
Standard:
Remote control of vehicle door lock can be operated.
LED lights up more than once.
Page 1774 of 3115

I04150
I07522
DI-940
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1133 Author: Date:
HINT:
The minimum operation distance differs according to op-
erator, the way of holding the transmitter, and location.
As weak wave is used, operation distance might be short-
ened when noise is detected in strong wave or used fre-
quency.
(e) Install the battery (lithium battery).
(f) Install a cover so that O-ring is not distorted or slipped off.
(g) Using a screwdriver, tighten the 2 screws.
5. CHECK BATTERY CAPACITY
HINT:
Make sure to use the TOYOTA electrical tester.
With the battery unloaded, judge can not be made wheth-
er the battery is available or not on the test.
When the transmitter is faulty, the energy amount left in
the battery might not be checked correctly.
On the lithium battery used for the transmitter, the voltage
more than 2.5 V with the battery unloaded is shown on the
tester until the energy is completely consumed.
Accordingly when inspecting the energy amount left in the
battery, it is necessary to measure the voltage when the
battery is loaded. (1.2 kW).
(a) Remove the 2 screws and cover using a (-) driver.
(b) Remove the battery (lithium battery) from the transmitter.
(c) Connect the lead to the (-) terminal of the transmitter and
install the battery.
(d) Connect the (+) tester to the (+) battery (lithium battery),
and (-) tester to the lead respectively.
(e) Press one of the transmitting switches on the transmitter
for approx. 1 second.
(f) Press the transmitting switch on the transmitter again to
check the voltage.
Standard: 2.1 V or more
Page 1775 of 3115

I04155
I04156
Terminal
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
DI-941
1134 Author: Date:
HINT:
When the temperature of the battery is low, the judge can
not be made correctly.
When the outcome of the test is less than 2.1 V, conduct
the test again after leaving the battery in the place at 18
°C for more than 30 minutes.
By auto power off function, the voltage becomes no load
voltage (more than 2.5 V) condition 20 seconds after the
switch was pressed.
Make sure to read the voltage before of it.
High voltage might be shown 1 to 2 times after leaving the
battery, judge should be made with the voltage shown at
the 3rd time or later.
(g) Disconnect the lead.
(h) Set the battery (lithium battery) in the transmitter.
(i) Install the cover, so that the O-ring is not distorted or
slipped off.
(j) Using a screwdriver, tighten the 2 screws.
6. REPLACE TRANSMITTER (LITHIUM) BATTERY
NOTICE:
Special caution should be taken for handling each compo-
nent as they are precision electronic components.
(a) Using a screwdriver, remove the screw and cover.
NOTICE:
Do not pry out the cover forcibly.
HINT:
Push the cover with a finger so that there becomes clearance,
then pry out the cover from that clearance.
(b) Remove the transmitter.
(c) Using a screwdriver, remove the 2 screws and cover.
(d) Remove the battery (lithium battery).
NOTICE:
Do not push the terminals with a finger.
If prying up the battery (lithium battery) forcibly to re-
move, the terminals are deformed.
(e) Install a battery (lithium battery) as shown in the illustra-
tion.
NOTICE:
Face the battery upward. Take care not to deform the termi-
nals.
(f) Check that O-ring is not distorted or slipped off, and
install the cover.
(g) Using a screwdriver, tighten the 2 screws.
Page 1776 of 3115

DI-942
- DIAGNOSTICSWIRELESS DOOR LOCK CONTROL SYSTEM
1135 Author: Date:
NOTICE:
When the shrews are tightened loosely, it might cause
faulty contact of battery (lithium battery) and terminals.
(h) Assemble the transmitter to the key plate and the cover.
(i) Using a screwdriver, tighten the screw.
7. REPLACE DOOR CONTROL RECEIVER AND TRANS-
MITTER
NOTICE:
When replacing the theft deterrent ECU or transmitter, reg-
istration of recognition code is necessary because they
are provided as a single components.
(a) Select the operation mode to perform from the following
operation modes.
Add mode
Rewrite mode
Prohibition mode
Confirmation mode
HINT:
The ºAdd modeº is for adding the newly recognized codes
for registration while the already registered codes are re-
tained. This mode is used when the transmitter is added.
When the number of the registered codes exceeds 4
codes, the previously registered codes will be erased in
order, staring from the first registered code.
The ºRewrite modeº is for erasing all the registered codes
and registering newly recognized codes only. This mode
is used when the transmitter or the door control receiver
is replaced.
The ºProhibition modeº is for erasing all the registered
codes to prohibit the wireless door lock operation. This
mode is used when the transmitter is lost.
The ºConfirmation modeº is for confirming the number of
recognition codes that are registered. This mode is used
to check the number of registered codes when new codes
are added to the registration, etc.
(b) Follow the chart on the following page to register the
transmitter recognition code to the theft deterrent ECU.
HINT:
When procedure is out of the specified, the registration
operation is cancelled
.
Maximum 4 recognition codes can be registered.
For the details of the registration procedure, see page
BE-93.