Lexus ES300 (1997 year). Manual - part 129

N21555

Front Door

Rear Door

3

2

N21544

Wire Harness Side

1

2

3

4

le–4–1–E

Z19531

Lock

A25

A12

BE–122

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

1506

1997 LEXUS ES300   (RM511U)

(c)

Disconnect the leads from terminals.

(d)

Approximately 60 seconds later, reverse the polarity, and
check that the door lock moves to the LOCK position.

If operation is not as specified, replace the door lock assembly.

11.

INSPECT DOOR LOCK ASSEMBLY CIRCUIT

Disconnect the connector from the switch and inspect the con-
nector on the wire harness side.

Tester connection

Condition

Specified condition

4 – Ground

Constant

Continuity

1 – Ground

3 – Ground

Door lock manual switch OFF or LOCK

No voltage

1 – Ground

3 – Ground

Door lock manual switch UNLOCK

Battery positive voltage

2 – Ground

Door lock manual switch OFF or UNLOCK

No voltage

2 – Ground

Door lock manual switch LOCK

Battery positive voltage

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

12.

Door Lock Signal:
INSPECT INTEGRATION RELAY OPERATION

HINT:
When the relay circuit is as specified, inspect the door lock sig-
nal.
(a)

Connect the positive (+) lead from the voltmeter to termi-
nal A12 and the negative (–) lead to terminal A25.

(b)

Set the door lock control switch to UNLOCK and check
that the voltage rises from 0 V to battery positive voltage
for approximately 0.2 seconds.

Z19532

Unlock

A25

A12

–

BODY ELECTRICAL

POWER DOOR LOCK CONTROL SYSTEM

BE–123

1507

1997 LEXUS ES300   (RM511U)

(c)

Reverse the polarity of the voltmeter leads.

(d)

Set the door lock control switch to LOCK and check that
the voltage rises from 0 V to battery positive voltage for
approximately 0.2 seconds.

If operation is not as specified, replace the relay.
13.

INSPECT INTEGRATION RELAY CIRCUIT
(See page 

BE–20

)

Z19375

Ignition Switch

Instrument Panel Junction Block

 GAUGE Fuse

 POWER Fuse

 DOOR Fuse

 Power Main Relay

 Integration Relay

Sliding Roof Switch

 Sliding Roof Control Relay

Sliding Roof Motor

 LImit Switch

Engine Room Junction Block

 DOME Fuse

BE05Q–01

BE–124

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

1508

1997 LEXUS ES300   (RM511U)

SLIDING ROOF SYSTEM

LOCATION

BE05R–01

N21643

Wire Harness Side

1 2

3

4

5 6 7

8

s–8–1

N21993

1

2

N21994

2

1

–

BODY ELECTRICAL

SLIDING ROOF SYSTEM

BE–125

1509

1997 LEXUS ES300   (RM511U)

INSPECTION

1.

INSPECT SLIDING ROOF CONTROL RELAY AND
SWITCH CIRCUIT

Disconnect the connector from the relay and switch and inspect
the connector on the wire harness side, as shown in the chart.

Tester connection

Condition

Specified  condition

1 – 5

Constant

Continuity

2 – Ground

Constant

Continuity

3 – Ground

No.1 limit switch OFF (Sliding roof closed)

No continuity

3 – Ground

No.1 limit switch ON (Sliding roof opened)

Continuity

7 – Ground

No.2 limit switch OFF (Sliding roof tilted up or

open approx. 200 mm (7.87 in.))

No continuity

7 – Ground

No.2 limit switch ON (Except for conditions

mentioned above)

Continuity

4 – Ground

Ignition switch LOCK or ACC

*No voltage

Ignition switch ON

Battery positive voltage

*Exceptions: For 60 seconds after the ignition switch is turned
ON 

→

 OFF (ACC) or until driver or passenger door is opened

after the ignition switch is turned ON 

→

 OFF (ACC).

If the circuit is as specified, replace the relay and switch.

2.

INSPECT SLIDING ROOF MOTOR OPERATION

(a)

Connect the positive (+) lead from the battery to terminal
1 and the negative (–) lead to terminal 2, check that the
motor turns counterclockwise (moves of the close and up
side).

(b)

Reverse the polarity, check that the motor turns clock-
wise. (moves of the open and down side).

If operation is not as specified, replace the motor.