Dtc B1206 P/W Master Switch Communication Stop

Communication System. Camry. Acv40 Gsv40
Multiplex Communication. Camry. Acv40 Gsv40

DESCRIPTION

WIRING DIAGRAM

INSPECTION PROCEDURE

CHECK HARNESS AND CONNECTOR (MASTER SWITCH - BATTERY AND BODY GROUND)

CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)

REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

CHECK DTC OUTPUT

DTC B1206 P/W Master Switch Communication Stop


DESCRIPTION

This DTC is stored when LIN communication between the power window regulator master switch assembly and main body ECU (instrument panel junction block) stops for more than 10 seconds.

DTC Code
DTC Detection Condition
Trouble Area
B1206
No communication between power window regulator master switch assembly and main body ECU (instrument panel junction block) for more than 10 seconds.
  1. Power window regulator master switch assembly
  2. Main body ECU (Instrument panel junction block)
  3. Wire harness or connector

WIRING DIAGRAM


Camry. Acv40 Gsv40.Multiplex Communication.Lin Communication System. Dtc B1206 P/W Master Switch Communication Stop


INSPECTION PROCEDURE

NOTICE:
When using the intelligent tester to troubleshoot with the ignition switch off:
Connect the intelligent tester to the DLC3, and turn the courtesy switch on and off at 1.5-second intervals until communication between the intelligent tester and vehicle begins.
1.CHECK HARNESS AND CONNECTOR (MASTER SWITCH - BATTERY AND BODY GROUND)


    Camry. Acv40 Gsv40.Multiplex Communication.Lin Communication System. Dtc B1206 P/W Master Switch Communication Stop

  1. Disconnect the M2 switch connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    M2-12 (GND) - Body ground
    		Always
    		Below 1 Ω
    Standard voltage:
    Tester Connection
    		Condition
    		Specified Condition
    M2-11 (B) - Body ground
    		Always
    		11 to 14 V


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


2.CHECK HARNESS AND CONNECTOR (MAIN BODY ECU - MASTER SWITCH)


    Camry. Acv40 Gsv40.Multiplex Communication.Lin Communication System. Dtc B1206 P/W Master Switch Communication Stop

  1. Disconnect the E8 ECU connector.

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

    Standard resistance:
    Tester Connection
    		Condition
    		Specified Condition
    E8-10 (LIN2) - M2-17 (LIN1)
    		Always
    		Below 1 Ω
    M2-17 (LIN1) - Body ground
    		Always
    		10 kΩ or higher


NG
REPAIR OR REPLACE HARNESS OR CONNECTOR
OK


3.REPLACE POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY

  1. Replace the power window regulator master switch assembly (CAMRY_ACV40 RM000002AC904HX.html).


NEXT


4.CHECK DTC OUTPUT

  1. Clear the DTC (CAMRY_ACV40 RM000002XHS00KX.html).

  1. Recheck for DTCs.

    OK:
    DTC B1206 is not output.


NG
REPLACE MAIN BODY ECU (INSTRUMENT PANEL JUNCTION BLOCK)
OK

END (POWER WINDOW REGULATOR MASTER SWITCH ASSEMBLY WAS DEFECTIVE)