Automatic Lighting/Rain Sensor (2016 2017 2018)

NOTE:

Before testing, check for DTCs. If any DTCs are indicated, troubleshoot those DTCs first.
If you are troubleshooting multiple DTCs, be sure to follow the instructions in B-CAN System Diagnosis Test Mode A - Refer to:
Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC Checks .
Before testing, make sure the No. D6 (10 A) fuse in the auxiliary under-dash fuse/relay box is OK.

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

2. Disconnect the Automatic Lighting/Rain Sensor 5P connector - Removal and Installation

.

GHH308768

Courtesy of HONDA, U.S.A., INC.

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/Rain Sensor - Removal and Installation .

Cavity	Wire	Test condition	Test: Desired result	Possible cause if desired result is not obtained
5	PUR	Under all conditions	Measure the voltage to ground: There should be battery voltage.	Blown No. D6 (10 A) fuse in the auxiliary under-dash fuse/relay box An open or high resistance in the wire
2	BLK	In all power modes	Measure the voltage to ground: There should be less than 0.2 V.	Poor ground (G501) An open or high resistance in the ground wire
1	BRN	Combination light switch in any position, other than headlight ON.	Measure the voltage to ground: There should be about 5 V.	An open or high resistance in the wire