Automatic Lighting Control Unit-Sensor Input Test
NOTE:
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A.
Before testing, make sure the No. A18 fuse is OK.

1.
Turn the vehicle to the OFF (LOCK) mode.

2.
3.
Inspect the connector and socket terminals to be sure they are all making good contact:
If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
If the terminals are OK, go to step 4.

4.
Reconnect the connector, and do the following input tests:
If any test indicates a problem, find and correct the cause, then recheck the system.
If all the input tests prove OK, replace the automatic lighting control unit-sensor.

Cavity
Wire
Test condition
Test: Desired result
Possible cause if desired result
is not obtained
3
BLK*1
BRN*2
In all power modes
Measure the voltage to ground:
There should be less than 0.2 V.
Poor ground (G505*1, G503*2)
An open or high resistance in the ground wire
4
RED
Under all conditions
Measure the voltage to ground:
There should be battery voltage.
Blown No. A18 fuse
An open or high resistance in the wire
5
YEL
Combination light switch OFF
Measure the voltage to ground:
There should be battery voltage.
An open or high resistance in the wire
*1: Except L15BY engine
*2: L15BY engine