Lexus ES: Automatic Light Control Sensor
Components
COMPONENTS
ILLUSTRATION
| *1 | AUTOMATIC LIGHT CONTROL SENSOR | *2 | NO. 1 SPEAKER OPENING COVER ASSEMBLY |
On-vehicle Inspection
ON-VEHICLE INSPECTION
PROCEDURE
1. INSPECT AUTOMATIC LIGHT CONTROL SENSOR
| (a) Disconnect the H3 automatic light control sensor connector. |
|
(b) Measure the voltage and resistance according to the value(s) in the table below.
Standard Voltage:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
|
*1: for HV Model
*2: for Gasoline Model | ||
| H3-1 (CLTB) - H3-2 (CLTE) | Power switch off*1 | Below 1 V |
| Engine switch off*2 | ||
| Power switch on (IG)*1 | 11 to 14 V | |
| Engine switch on (IG)*2 | ||
Standard Resistance:
| Tester Connection | Condition | Specified Condition |
|---|---|---|
| H3-2 (CLTE) - Body ground | Always | Below 1 Ω |
If the result is not as specified, there may be a malfunction on the wire harness side.
(c) Connect the H3 automatic light control sensor connector.
(d) Connect an oscilloscope to terminals H3-2 (CLTE) and H3-4 (CLTS) of the automatic light control sensor connector and check the waveform.
| *a | Component with harness connected (Automatic Light Control Sensor) | *b | Waveform |
OK:
| Tester Connection | Condition | Tool Setting | Specified Condition |
|---|---|---|---|
|
*1: for HV Model
*2: for Gasoline Model | |||
| H3-2 (CLTE) - H3-4 (CLTS) | Power switch on (IG)*1 | 2 V/DIV., 10 ms./DIV. | Pulse generation (See waveform) |
| Engine switch on (IG)*2 | |||
HINT:
The communication waveform changes according to the surrounding brightness.
If the result is not as specified, the automatic light control sensor may be malfunctioning.
Removal
REMOVAL
PROCEDURE
1. REMOVE NO. 1 SPEAKER OPENING COVER ASSEMBLY
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2. REMOVE AUTOMATIC LIGHT CONTROL SENSOR
| (a) Disengage the 2 claws to remove the automatic light control sensor. |
|
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