Lexus RX300 (MCU15). Service manual - part 128
Z10066
Wire Harness Side
1 2 3
4 5
BE4118
BE4119
–
BODY ELECTRICAL
WIPER AND WASHER SYSTEM
BE–59
LEXUS RX300 (RM785E)
10.
INSPECT WIPER MOTOR CIRCUIT
Disconnect the connector from the motor and inspect the con-
nector on the wire harness side.
Tester connection
Condition
Specified condition
5 – Ground
Constant
Continuity
1 – Ground
* Wiper switch OFF or INT, HIGH
No voltage
1 – Ground
* Wiper switch LOW
Battery voltage
2 – Ground
Ignition switch LOCK or ACC
No voltage
2 – Ground
Ignition switch ON
Battery voltage
4 – Ground
* Wiper switch OFF or INT, LOW
No voltage
4 – Ground
* Wiper switch HIGH
Battery voltage
*: Turn ignition switch ON
If circuit is not as specified, inspect the circuits connected to oth-
er parts.
11.
Front Washer:
INSPECT WASHER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 2 and
the negative (–) lead to terminal 1, check that the motor oper-
ates.
NOTICE:
These tests must be performed quickly (within 20 seconds)
to prevent the coil from burning out.
If operation is not as specified, replace the motor.
12.
Rear Washer:
INSPECT WASHER MOTOR OPERATION
Connect the positive (+) lead from the battery to terminal 2 and
the negative (–) lead to terminal 3, check that the motor oper-
ates.
NOTICE:
These tests must be performed quickly (within 20 seconds)
to prevent the coil from burning out.
If operation is not as specified, replace the motor.