Auto High-Beam (High-Beam Support System) Control Unit Input Test (2017)
NOTE:
- Before testing, check for DTCs. If any DTCs are indicated, troubleshoot the indicated 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. B5 (10 A) fuse in the under-dash fuse/relay box is OK.
1. Turn the vehicle to the OFF (LOCK) mode.
2. Disconnect the auto high-beam control unit 6P connector - Refer to: Rearview Mirror Removal and Installation (2017)
.
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 look 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 auto high-beam control unit - Refer to: Rearview Mirror Removal and Installation (2017) .
| Cavity | Wire | Test condition | Test: Desired result | Possible cause if desired result is not obtained |
|---|---|---|---|---|
| 1 | BRN | Vehicle in ON mode | Measure the voltage to ground: There should be battery voltage. |
|
| 4 | BLK | In all power modes | Measure the voltage to ground: There should be less than 0.2 V. |
|