Automatic Light Control Sensor Circuit

LIGHTING: LIGHTING SYSTEM: Automatic Light Control Sensor Circuit

Automatic Light Control Sensor Circuit

WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. CHECK LIGHTS
(a) Check that headlight and taillight light up.

NG -- PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE

OK -- Continue to next step.

2. INSPECT HEADLIGHT DIMMER SWITCH ASSEMBLY




(a) Inspect light control switch continuity.
(1) Check that there is a continuity between terminals at each switch position as shown in the chart.
Standard:





NG -- REPLACE HEADLIGHT DIMMER SWITCH ASSEMBLY
OK -- Continue to next step.

3. INSPECT AUTOMATIC LIGHT CONTROL SENSOR




(a) Measure voltage between terminals as shown in the chart below.
(b) Check the continuity between terminal 3 (CLTE) and body ground as shown in the chart below.
(c) Using an oscilloscope, check that signal waveform appears between terminals.
Standard voltage:





NG -- REPLACE AUTOMATIC LIGHT CONTROL SENSOR
OK -- Continue to next step.

4. CHECK HARNESS AND CONNECTOR (BETWEEN BODY ECU AND AUTOMATIC LIGHT CONTROL SENSOR)
(a) Check that signal waveform appears between terminals B6-4 (CLTS) and B6-21 (CLTE) of the multiplex network body ECU.
Standard:
Bar appears
(b) Measure voltage between terminals B6-6 (CLTB) and B6-21 (CLTE) of the multiplex network body ECU.
Standard voltage:
10 to 14 V
(c) Check the continuity between terminal B6-21 (CLTE) of the multiplex network body ECU and body ground.
Standard:
There is continuity

NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE MULTIPLEX NETWORK BODY ECU