Inspection Procedure

WARNING: This page is about a different car, the 2004 Lexus LS 430. However, it is still accessible from the selected car via links, so may be relevant.

CHECK HARNESS AND CONNECTOR (AUTOMATIC LIGHT CONTROL SENSOR POWER SOURCE CIRCUIT)

Fig 1: Voltage Reference Chart
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1. Disconnect the automatic light control sensor connector.
2. Measure the voltage according to the value (s) in the figure Fig 2 below.
Standard:

Fig 2: Checking Harness And Connector (Automatic Light Control Sensor Power Source Circuit)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Go to step 4
2. OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK-AUTOMATIC LIGHT CONTROL SENSOR)

Fig 3: Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D6 connector from the driver side junction block.
2. Measure the resistance according to the value (s) in the figure Fig 4 below.
Standard:

Fig 4: Checking Harness And Connector (Driver Side Junction Block-Automatic Light Control Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 5: Identifying Connector Terminal Of Driver Side Junction Block
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1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: Go to Next Step
REPLACE AUTOMATIC LIGHT CONTROL SENSOR
1. OK: Returns to normal operation.
2. NG: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PROBLEM SYMPTOMS TABLE )
OK: END
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK-AUTOMATIC LIGHT CONTROL SENSOR)

Fig 6: Voltage Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Measure the voltage according to the value (s) in the figure Fig 7 below.
Standard:

Fig 7: Checking Harness And Connector (Driver Side Junction Block-Automatic Light Control Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: Go to step 6
2. OK: Go to Next Step
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK-AUTOMATIC LIGHT CONTROL SENSOR)

Fig 8: Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D6 connector from the driver side junction block assy.
2. Measure the resistance according to the value (s) in the figure Fig 9 below.
Standard:

Fig 9: Checking Harness And Connector (Driver Side Junction Block-Automatic Light Control Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 10: Identifying Connector Terminal Of Driver Side Junction Block
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PROBLEM SYMPTOMS TABLE )
CHECK HARNESS AND CONNECTOR (DRIVER SIDE JUNCTION BLOCK-AUTOMATIC LIGHT CONTROL SENSOR)

Fig 11: Resistance Reference Chart
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. Disconnect the D6 connector from the driver side junction block assy.
2. Measure the resistance according to the value (s) in the figure Fig 12 below.
Standard:

Fig 12: Checking Harness And Connector (Driver Side Junction Block-Automatic Light Control Sensor)
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Fig 13: Identifying Connector Terminal Of Driver Side Junction Block
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
1. NG: REPAIR OR REPLACE HARNESS OR CONNECTOR
2. OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN PROBLEM SYMPTOMS TABLE (SEE PROBLEM SYMPTOMS TABLE )