DTC B1206: P/W Master Switch Communication Stop [09/2015 - ]: Procedure

1. Clear the DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).

Result:  NEXT

NEXT 

See step  2

1. Recheck for DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   DTC B1206 is not output.

Result:  OK

OK 

USE SIMULATION METHOD TO CHECK 

(Refer to HOW TO PROCEED WITH TROUBLESHOOTING [09/2015 - ] )

Result:  NG

NG 

See step  3

1. Disconnect the L11 ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Disconnect the N13 switch connector.
3. Measure the resistance according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   L11-10 (LIN2) - N13-17 (LIN1)	Always	Below 1 Ω
   L11-10 (LIN2) or N13-17 (LIN1) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  4

1. Disconnect the N13 switch connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance and voltage according to the value(s) in the table below.

   Standard resistance

   Tester Connection	Condition	Specified Condition
   N13-12 (GND) - Body ground	Always	Below 1 Ω

   Standard voltage

   Tester Connection	Condition	Specified Condition
   N13-11 (B) - Body ground	Always	11 to 14 V

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  5

1. Temporarily replace the power window master switch with a new or normally functioning one (Refer to REMOVAL [09/2015 - ] ).

Result:  NEXT

NEXT 

See step  6

1. Clear the DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).
2. Recheck for DTC (Refer to DTC CHECK / CLEAR [09/2015 - ] ).

   OK

   DTC B1206 is not output.

Result:  OK

OK 

END (POWER WINDOW MASTER SWITCH IS DEFECTIVE) 

Result:  NG

NG 

REPLACE MAIN BODY ECU (DRIVER SIDE JUNCTION BLOCK)