DTC B1206: P/W Master Switch Communication Stop: Procedure

1. Remove the FR DOOR LH fuse from the cowl side J/B LH.
2. Measure the resistance of the fuse.

   Standard resistance

   Below 1 Ω

NG → REPLACE FUSE 

OK: Go to next step 

1. Disconnect the M17 switch connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Turn the engine switch on (IG).
3. Measure the voltage and resistance of the wire harness side connector.

   Standard voltage

   Tester Connection	Condition	Specified Condition
   CPUB (M17-15) - Body ground	Always	10 to 14 V

   Standard resistance

   Tester Connection	Specified Connection
   E (M17-12) - Body ground	Below 1 Ω

NG → REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: Go to next step 

1. Disconnect the M17, Q3 and P33 ECU connectors.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

2. Measure the resistance between the specified terminals on the wire harness side connectors.

   Standard resistance

   Tester Connection	Specified Condition
   MPX1 (M17-3) - MPX1 (Q3-15)	Below 1 Ω
   MPX2 (M17-2) - MPX2 (P33-28)	Below 1 Ω

   Result

   Result	Proceed to
   Both are OK	A
   One is OK	B
   Both are NG	C

B → REPAIR OR REPLACE HARNESS OR CONNECTOR AND REPLACE POWER WINDOW MASTER SWITCH 

C → REPAIR OR REPLACE HARNESS OR CONNECTOR 

A → REPLACE POWER WINDOW MASTER SWITCH