Lexus RX300 (MCU15). Service manual — part 144

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

BE–123

LEXUS RX300 (RM785E)

Within
3 secs.

Turn the ignition switch from ON to LOCK at approx. 1 sec. interval 1 to 5 times to select the mode.

Pull out the key plate from the ignition key cylinder.

When add mode or rewrite mode
is selected.

When confirmation
mode is selected.

ON

ON

ON

LOCK

LOCK

LOCK

Approx.

1 sec.

Approx.

1 sec.

Approx. 1 sec.

Approx.

1 sec.

Approx.

1 sec.

Add mode

Rewrite mode

Confirmation mode

ON – LOCK change occurs 1 time

ON – LOCK change occurs 2 times

ON – LOCK change occurs 3 times

MPX body ECU automatically performs
the LOCK–UNLOCK operation once
or twice at 1 sec. interval to iniform the
operator that either the add mode or
rewrite mode has been selected.

LOCK–UNLOCK occurs once

LOCK–UNLOCK occurs twice

Indicates that add mode has been selected.

Indicates that rewrite mode has been
selected.

1 sec.

LOCK

1 sec. 1 sec.

LOCK

UNLOCK

UNLOCK

LOCK

2 secs. 2 secs.

UNLOCK

MPX body ECU automatically performs the
LOCK–UNLOCK operation 1 to 4 times at
2 sec. interval to inform the operator of
the number of the registered codes.
HINT:
When the number of the registered code
is 0, the operation is automatically
performed 5 times.

Example:
When the operation is performed twice, it
directs that 2 types of recognition code
have been registered.

1st time 2nd time

Registration of recognition code (Confirmation
mode and prohibition mode) is completed.

ON

LOCK

Approx.

1 sec.

Approx.

1 sec.

Prohibition mode

ON – LOCK change occurs 5 times

When prohibition
mode is selected.

BE–124

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BODY ELECTRICAL

WIRELESS DOOR LOCK CONTROL SYSTEM

LEXUS RX300 (RM785E)

MPX body performs LOCK–UNLOCK operation 5 times at a 1 sec.
interval to inform the operator that prohibition mode has been selected.

Press again either of switches on the transmitter for more than 1 sec.

MPX body ECU automatically performs LOCK–UNLOCK operation once or
twice at a 1 sec. interval to inform the operator that the receiver has received the
signal from the transmitter.

LOCK–UNLOCK occurs once

LOCK–UNLOCK occurs twice

Registration of recognition code is completed

Registration of recognition code has not been completed.
D Recognition code received first time and second time did not match.

Proceed to continue registration

If even one of the following conditions is satisfied, registration of recognition
codes is completed.

D 40 secs. elapses since the MPX body ECU response.
D The driver’s door is closed.
D The key plate is inserted in the ignition key cylinder.
D 4 type recognition codes are registration at one time.

Registration of recognition codes (add mode or rewrite mode) is completed.

Within
3 secs.

Within
40 secs.

ON

LOCK

Approx.

1 sec.

Approx.

1 sec.

When prohibition
mode is selected.

Press the lock and unlock switches on the transmitter simultaneously within 1.5 sec.

If LOCK–UNLOCK operation can not be performed at all, the mode returns to the
normal mode, then start with ”Start registration of recognition code”.

Proceed to finish registration

Within 40 secs.

Within 3 secs.

BE0GK–09

I19118

Instrument Panel J/B
D POWER Fuse

Reclining Motor

Power Seat
Switch

Slide Motor

Lumber Support Motor

Lifter Motor

Reclining Motor

Lumber Support
Switch

Power Seat Switch

Front Vertical Motor

Front Vertical Motor

Lumber Support
Switch

Lifter Motor

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BODY ELECTRICAL

POWER SEAT CONTROL SYSTEM

BE–125

LEXUS RX300 (RM785E)

POWER SEAT CONTROL SYSTEM

LOCATION

BE0UM–02

I08166

Lifter

Up

Down

Reclining

Front Vertical

Up

Down

Front

Back

Forward

Rear

BE–126

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BODY ELECTRICAL

POWER SEAT CONTROL SYSTEM

LEXUS RX300 (RM785E)

INSPECTION

1.

INSPECT DRIVER’S (LHD)/PASSENGER’S (RHD)
POWER SEAT SWITCH CONTINUITY
Slide Switch:

Switch position

Tester connection

Specified condition

FRONT

1 – 9

4 – 6

Continuity

OFF

4 – 6

4 – 9

Continuity

BACK

1 – 6

4 – 9

Continuity

Front vertical switch:

Switch position

Tester connection

Specified condition

UP

1 – 10

4 – 5

Continuity

OFF

4 – 5

4 – 10

Continuity

DOWN

1 – 5

4 – 10

Continuity

Lifter switch:

Switch position

Tester connection

Specified condition

UP

1 – 7

4 – 8

Continuity

OFF

4 – 7

4 – 8

Continuity

DOWN

1 – 8

4 – 7

Continuity

Reclining switch:

Switch position

Tester connection

Specified condition

FORWARD

1 – 3

2 – 4

Continuity

OFF

2 – 4

3 – 4

Continuity

REAR

1 – 2

3 – 4

Continuity

If continuity is not as specified, replace the switch.