B1575

DTC B1575: Automatic Lighting Sensor Circuit Malfunction

1. Clear the DTCs with the HDS.
2. Turn the ignition switch to LOCK (0) and then back to ON (II).
3. Wait for a second.
4. Check for DTCs with the HDS.

Is DTC B1575 indicated?

YES - Go to step 5.

NO - Intermittent failure, the system is OK at this time. Check for loose or poor connections.

5. Turn the ignition switch to LOCK (0).
6. Disconnect the automatic lighting/sunlight sensor 5P connector.
7. Turn the ignition switch to ON (II).
8. Measure the voltage between body ground and the automatic lighting/sunlight sensor 5P connector No. 1 terminal.






Is there about 5 V?

YES - Replace the automatic lighting/sunlight sensor.

NO - Go to step 9.

9. Turn the ignition switch to LOCK (0).
10. Disconnect passenger's under-dash fuse/relay box connector D (28P).
11. Check for continuity between the passenger's under-dash fuse/relay box connector D (28P) No. 9 terminal and the automatic lighting/sunlight sensor 5P connector No. 1 terminal.






Is there continuity?

YES - Faulty passenger's MICU. Substitute a known-good passenger's under-dash fuse/relay box and recheck.

NO - Repair an open in the wire.