Lexus RX300 (MCU15). Manual — part 143

I12073

From Back Side

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

BE–119

LEXUS RX300 (RM785E)

4.

INSPECT WIRELESS DOOR LOCK CONTROL RE-
CEIVER CIRCUIT

Connect the wire harness side connector to the receiver and in-
spect the wire harness side connector from the back side, as
shown.

Tester connection

Condition

Specified condition

3 – Ground

Normal mode

10 – 14 V

2 – Ground

Ignition switch position OFF

Key removed

Transmitter ON

6 – 7 V

If circuit is as specified, replace the receiver.
If the circuit is not as specified, inspect the circuits connected
to other parts.

BE0GP–12

I04154

I04155

I04156

Push

BE–120

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

LEXUS RX300 (RM785E)

REPLACEMENT

1.

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 as shown in the illustration, so that
there becomes clearance, then pry out the cover from that
clearance.
(b)

Remove the transmitter.

(c)

Remove the 2 screws and cover.

(d)

Remove the battery (lithium battery).

NOTICE:

S

Do not push the terminals with a finger.

S

If prying up the battery (lithium battery) forcibly to re-
move, the terminals are deformed.

(e)

Install a battery (lithium battery).

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.

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.

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

BE–121

LEXUS RX300 (RM785E)

2.

REPLACE DOOR CONTROL RECEIVER AND TRANS-
MITTER

NOTICE:
When replacing the door control receiver and transmitter,
registration of recongnition code is necessary because
they are provided as single components.
(a)

Select which operation mode should be performed from
the following modes.

S

Add mode

S

Rewrite mode

S

Prohibition mode

S

Confirmation mode

HINT:

S

The add mode is used to retain codes already registered
while you register new recongnition codes. This mode is
used when adding a transmitter. However, if the number
of registered codes exceeds 4 codes, previously regis-
tered codes are correspondingly erased in order, starting
from the first registered code.

S

The rewrite mode is used to erase all previously regis-
tered codes and register only new recognition codes.

S

The prohibition mode is used to erase all registered codes
and cancels the wireless door lock function. Use this
mode when the transmitter is lost.

S

The confirmation mode is for confirming how many re-
congnition codes are already registered before you regis-
ter additional recognition codes.

(b)

Follow the chart on the following pages to register the
transmitter recongnition code at the wireless door lock
conrol receiver.

HINT:

S

When procedure is out of the specified, the operation re-
turns to normal operation.

S

Maximum 4 recognition codes can be registered.

BE–122

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

LEXUS RX300 (RM785E)

Start registration of recognition code

The vehicle should be in the following conditions.
D The key is not inserted in the ignition key cylinder.
D Driver’s door is OPEN. (Other doors are CLOSED)
D Driver’s door is UNLOCKED.

Insert the key into the ignition key cylinder, then pull it out.

Press the door lock control switch (for manual operation) 5 times to
LOCK/UNLOCK at approx. 1 sec. interval.

1st time

2nd time

3rd time

4th time

5th time

LOCK

OFF

UNLOCK

Approx.

1 sec.

Approx.

1 sec.

Close the driver’s door, then open it.

Again press the door lock control switch (for manual operation) 5 times to
LOCK/UNLOCK at approx. 1 sec. interval.

1st time

2nd time

3rd time

4th time

5th time

LOCK

OFF

UNLOCK

Approx.

1 sec.

Approx.

1 sec.

Insert the key into the ignition key cylinder.

Within
40 secs.

Within
40 secs.