Lexus ES manuals

Lexus ES: On-vehicle Inspection

ON-VEHICLE INSPECTION

PROCEDURE

1. INSPECT RAIN SENSOR

(a) Disconnect the rain sensor connector.

*a

Front view of wire harness connector

(to Rain Sensor)

(b) Measure the voltage according to the value(s) in the table below.

Standard Voltage:

Tester Connection

Condition

Specified Condition

4 (SIG) - 2 (ES)

Engine switch on (IG)

11 to 14 V

(c) Measure the resistance according to the value(s) in the table below.

Standard Resistance:

Tester Connection

Condition

Specified Condition

2 (ES) - Body ground

Always

Below 1 Ω

HINT:

If the result is not as specified, replace the rain sensor.

(d) Reconnect the rain sensor connector.

*a

Component with harness connected

(Rain Sensor)

(e) Connect an oscilloscope to terminal 3 (MPX) and 2 (ES) of the rain sensor connector.

(f) Check for pulses according to the value(s) in the table below.

OK:

Tester Connection

Condition

Specified Condition

3 (MPX) - 2 (ES)

Engine switch on (IG)

Front wiper switch in auto

Pulse generation

HINT:

If the result is not as specified, replace the rain sensor.

READ NEXT:

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