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 - Refer to: Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode A - Initial Communication and DTC ChecksBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode 1 and Test Mode 2 (without the HDS)Body Electrical Troubleshooting - B-CAN System Diagnosis Test Mode B - Control Unit Not CommunicatingBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode C - No DTCs and Output Won't Shut OFFBody Electrical Troubleshooting - B-CAN System Diagnosis Test Mode D - No DTCs and Output Won't Turn ON .
- Before testing, make sure the No. A29 (10 A) fuse in the under-hood fuse/relay box is OK.
1. Turn the vehicle to the OFF (LOCK) mode
2. Disconnect the following connector.
| Automatic lighting control unit/sensor 7P connector |
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 |
|---|---|---|---|---|
| 1 | RED | Under all conditions | Measure the voltage to ground: There should be battery voltage. |
|
| 4 | BRN | In all ignition switch positions or all power modes | Check for continuity to ground: There should be continuity. |
|
| 5 | WHT | Under all conditions | Measure the voltage to ground: There should be about 5 V. | An open or high resistance in the wire |