| DTC B1127: | Driver's Door Key Cylinder Switch Signal Error |
| 1. | Clear the DTCs with the HDS. |
| 2. | Turn the ignition switch OFF, and then back ON (II). |
| 3. | Insert the ignition key into the driver's door key cylinder switch, and turn the key in LOCK and UNLOCK positions ten times. |
| 4. | Check for DTCs with the HDS. Is DTC B1127 indicated? YES - Go to 5. NO - Intermittent failure. The driver's door key cylinder switch system is OK at this time.n |
| 5. | With the driver's door key cylinder in the neutral position, select KEYLESS with the HDS, and enter the DATA LIST. |
| 6. | Check the ON/OFF information of the DRIVER'S DOOR KEY CYLINDER SWITCH (LOCK) and DRIVER'S DOOR KEY CYLINDER SWITCH (UNLOCK) in the DATA LIST. Are both information indicators OFF? YES - Faulty MICU, replace the under-dash fuse/relay box.n NO - Go to 7. |
| 7. | Disconnect the driver's door lock actuator 10P connector. |
| 8. | Check the ON/OFF information of the DRIVER'S DOOR KEY CYLINDER SWITCH (LOCK) and DRIVER'S DOOR KEY CYLINDER SWITCH (UNLOCK) in the DATA LIST. Are both information indicators OFF? YES - Faulty driver's door key cylinder switch; replace the driver's door lock actuator.n NO - Go to 9. |
| 9. | Turn the ignition switch OFF. |
| 10. | Disconnect the under-dash fuse/relay box connector T (34P). |
| 11. | Check for continuity between the No. 31 (UNLOCK) and No. 32 (LOCK) terminals of the under-dash fuse/relay box connector T (34P) and body ground.
Are there continuity? YES - Repair a short in the LOCK or UNLOCK wire.n NO - Go to 12. |
| 12. | Check for continuity between the No. 31 (UNLOCK) and No. 32 (LOCK) terminals of the under-dash fuse/relay box connector T (34P).
Is there continuity? YES - Repair a short in the wire between the LOCK and UNLOCK wires.n NO - Faulty MICU, replace the under-dash fuse/relay box.n |