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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