B2251

ENGINE HOOD / DOOR: BACK DOOR CLOSER SYSTEM: B2251: Back Door Closer Switch Malfunction

DTC B2251 - Back Door Closer Switch Malfunction

DESCRIPTION

The power back door drive unit (power back door ECU) inputs signals from the full-latch switch, sector switch and back door courtesy light switch, which are built into the back door lock. Based on these switch signals, the latch position of the back door lock is determined.






WIRING DIAGRAM





INSPECTION PROCEDURE

PROCEDURE

1. READ VALUE ON TECHSTREAM (BACK DOOR COURTESY LIGHT SWITCH)
(a) Check the Data List to determine if the back door courtesy light switch function properly.

Back door (Power back door ECU)





OK:
The display is as specified in the normal condition.
NG -- INSPECT BACK DOOR LOCK (BACK DOOR COURTESY LIGHT SWITCH)
OK -- REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)
2. INSPECT BACK DOOR LOCK (BACK DOOR COURTESY LIGHT SWITCH)




(a) Remove the back door lock. Removal
(b) Measure the resistance according to the value(s) in the table below.
Standard resistance:
Back door courtesy light switch






NG -- REPLACE BACK DOOR LOCK
OK -- Continue to next step.
3. CHECK HARNESS AND CONNECTOR (BACK DOOR LOCK - POWER BACK DOOR ECU AND BODY GROUND)




(a) Disconnect the T4 door lock connector.
(b) Disconnect the O15 ECU connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard resistance:






NG -- REPAIR OR REPLACE HARNESS OR CONNECTOR
OK -- REPLACE POWER BACK DOOR DRIVE UNIT (POWER BACK DOOR ECU)