Lexus ES300 (1997 year). Service manual — part 418

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N13465

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DIAGNOSTICS

WIRELESS DOOR LOCK CONTROL SYSTEM

DI–449

601

1997 LEXUS ES300 (RM511U)

2.

WIRELESS DOOR LOCK ECU AND TRANSMITTER
REPLACEMENT
Disassembly and assembly of the transmitter includes
details of spare parts and replacement procedure for de-
tective parts found through troubleshooting.
Each part is a precision electronic component so handle
with care.

(a)

SPARE PARTS AND REPLACEMENT PROCEDURE
FOR MALFUNCTIONING PARTS:

For malfunctioning transmitter:
(1)

Prepare a new transmitter.

(2)

Registration of recognition code.

(3)

Check that door lock remote control operation
works.

For malfunctioning battery:
(1)

Prepare a new battery.

(2)

Remove the battery from transmitter.

(3)

Install a new battery into transmitter.

For malfunctioning ECU:
(1)

Prepare a new ECU.

(2)

Remove the ECU from the vehicle.

(3)

Install a new ECU in the vehicle.

(4)

Registration of recognition code.

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DI–450

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DIAGNOSTICS

WIRELESS DOOR LOCK CONTROL SYSTEM

602

1997 LEXUS ES300 (RM511U)

(b)

REPLACE 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

Follow the flow chart on the following page to register the trans-
mitter recognition code with the wireless door lock ECU.
HINT:

If the prescribed conditions are not entered while register-
ing the transmitter code, the wireless door lock ECU re-
turns to normal operation.

There are 4 modes: add mode, rewrite mode, confirma-
tion mode and erase mode; the mode to use is decided
after the recognition code is registered.

If maximum of 4 recognition codes can be registered.

REFERENCE:

The add mode is used to retain codes already registered
while you register new recognition codes.
However, if the number of registered codes exceeds 4
codes, previous registered codes are correspondingly
erased in order, starting from the first registered code.

The rewrite mode is used to erased all previous registered
codes before registering new recognition codes. This
mode before registering new transmitter or wireless door
lock ECU.

The confirmation mode is for confirming how many recog-
nition codes are already registered before you register
additioned recognition codes.

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

Start registration of recognition code

The vehicle should be as follows.

The key is not inserted in the ignition key cylinder.

Driver’s door is OPEN. (Other doors are CLOSED)

Driver’s door is UNLOCKED.

Insert the key into the ignition key cylinder, then remove it.

Using the door control switch (for manual operation) move the switch 5 times to
LOCK/UNLOCK at approx. 1 sec. intervals.

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 using the door control switch (for manual operation), move the switch 5 times
to LOCK/UNLOCK at approx. 1 sec. intervals.

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.

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DIAGNOSTICS

WIRELESS DOOR LOCK CONTROL SYSTEM

DI–451

603

1997 LEXUS ES300 (RM511U)

Within
20 secs.

Turn the ignition switch from ON to LOCK at approx. 1 sec. intervals for 1 to 5 times according
to the desired mode.

Remove the key from the ignition key cylinder.

When add mode, rewrite mode
or erase mode been selected.

When confirmation
mode is selected.

ON

ON

ON

ON

LOCK

LOCK

LOCK

LOCK

Approx.

1 sec.

Approx.

1 sec.

Approx. 1 sec.

Approx.

1 sec.

Approx.

1 sec.

Approx.

1 sec.

Approx.

1 sec.

Add mode

Rewrite mode

Confirmation mode

Erase mode

ON – LOCK change
occurs 1 time

ON – LOCK change
occurs 2 times

ON – LOCK change
occurs 3 times

ON – LOCK change
occurs 5 times

The receiver automatically performs the LOCK–
UNLOCK operation once, twice or 5 times at 1
sec. intervals to inform the technician whether
the add mode, rewrite mode or erase mode has
been selected.

LOCK–UNLOCK occurs once

LOCK–UNLOCK occurs twice

LOCK–UNLOCK occurs 5 times

Indicates that add mode has been selected.

Indicates that rewrite mode has been selected.

Indicates that erase mode has been selected.

1 sec.

LOCK

1 sec. 1 sec.

1 sec. 1 sec.

LOCK

UNLOCK

UNLOCK

UNLOCK

LOCK

LOCK

2 secs. 2 secs.

UNLOCK

The receiver automatically performs the LOCK–
UNLOCK operation 0 to 4 times at 2 sec. inter-
vals to inform the technician of the number of
registered codes.

Example:
LOCK–UNLOCK occurs twice:
2 recognition codes are registered.

1st time 2nd time

Erase Mode

Registration of recognition code
(Confirmation mode) and erase mode completed.

DI–452

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DIAGNOSTICS

WIRELESS DOOR LOCK CONTROL SYSTEM

604

1997 LEXUS ES300 (RM511U)