B1026

DTC B1026: Passenger's Door Lock Switch Signal Error

1. Clear the DTCs using the HDS.
2. Cycle the ignition switch to OFF, and then back ON.
3. Operate the passenger's door lock switch.
4. Check for DTCs using the HDS.

Is DTC B1026 indicated?

YES - Go to step 5.

NO - Intermittent failure. The passenger's door lock system is OK at this time. Check pinfits and connections.

5. With the door lock in UNLOCK position, select SECURITY from the HDS and enter the DATA LIST.
6. Check the ON/OFF information of the Front Passenger's Door Lock Sw. (LOCK) and Front Passenger's Door Lock Sw. (UNLOCK) in the DATA LIST.

Are both information indicators OFF?

YES - Go to step 7.

NO - Go to step 9.

7. Make sure the ON/OFF information of the Front Passenger's Door Lock Sw. (LOCK) and Front Passenger's Door Lock Sw. (UNLOCK) are changed when the passenger's door lock switch is in the LOCK and UNLOCK positions.

Does the information show the correct ON and OFF indications when the door lock switch in the LOCK and UNLOCK positions?

YES - Intermittent failure, the switch, harness and MICU input circuits are OK at this time. Check pinfits and connections.

NO - Go to step 8.

8. Check for an open in the wire between the MICU and passenger's door lock switch at the security alarm/keyless door lock system control unit input test.

Are the wire harnesses OK?

YES - Faulty passenger's door lock switch; replace it.
NO - An open in the wire, repair and recheck.

9. Remove the passenger's inner handle.
10. Disconnect the 3P connector from the passenger's door lock switch.
11. Check the ON/OFF information of the Front Passenger's Door Lock Sw. (LOCK) and Front Passenger's Door Lock Sw. (UNLOCK) in the DATA LIST.

Are both information indicators OFF?

YES - Faulty passenger's door lock switch; replace it.

NO - Go to step 12.

12. Check for a short in the wire between the MICU and passenger's door lock switch at the security alarm/keyless door lock system control unit input test.

Are the wire harnesses OK?

YES - Faulty MICU; replace it.

NO - A short in the wire, repair and recheck.