DTC B2228: PBD Unit Motor LH Circuit [12/2012 - 10/2015]: Procedure

1. Clear the DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   Body Electrical > Back Door > Clear DTCs 

2. Check for DTCs.

   Refer to DTC CHECK / CLEAR [12/2012 - ]

   Body Electrical > Back Door > Trouble Codes 

Result: 

DTC B2228 is not output 

USE SIMULATION METHOD TO CHECK. Refer to  HOW TO PROCEED WITH TROUBLESHOOTING [12/2012 - 11/2013]  , or refer to  HOW TO PROCEED WITH TROUBLESHOOTING [11/2013 - 10/2015] 

Result: 

DTC B2228 is output 

See step  2

1. Fully open the back door.
2. Disconnect the power back door unit assembly set LH connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component without harness connected (Power Back Door Unit Assembly Set LH)

3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   1 (BD+) - Body ground	Always	10 kΩ or higher
   2 (BD-) - Body ground	Always	10 kΩ or higher
   1 (BD+) - 2 (BD-)	Always	Below 1 MΩ

Result: 

NG 

REPLACE POWER BACK DOOR UNIT ASSEMBLY SET LH. Refer to  REMOVAL [12/2012 - ] 

Result: 

OK 

See step  3

1. Disconnect the U19 multiplex network door ECU connector.
2. Disconnect the U21 power back door unit assembly set LH connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   U19-3 (BD+) - U21-1 (BD+)	Always	Below 1 Ω
   U19-4 (BD-) - U21-2 (BD-)	Always	Below 1 Ω
   U19-3 (BD+) or U21-1 (BD+) - Body ground	Always	10 kΩ or higher
   U19-4 (BD-) or U21-2 (BD-) - Body ground	Always	10 kΩ or higher

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU. Refer to  REMOVAL [12/2012 - 10/2015] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR