DTC B1206: P/W Master Switch Communication Stop [08/2014 - ]: Procedure

1. Remove the instrument panel junction block assembly (See article. Refer to REMOVAL [08/2014 - ] ).

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2. Remove the main body ECU (multiplex network body ECU) from the instrument panel junction block assembly.
3. Measure the resistance according to the value(s) in the table below.

   HINT: 

   This inspection is to check the LIN line in the instrument panel junction block assembly that connects the wire harness to the built-in main body ECU (multiplex network body ECU).

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2A-27 (LIN2) - MB-16 (LIN2)	Always	Below 1 Ω
   2A-27 (LIN2) - Body ground	Always	10 kΩ or higher

   TEXT IN ILLUSTRATION
   
   

   *a

   Component without harness connected (Instrument Panel Junction Block Assembly)

   *b

   Component without harness connected (Instrument Panel Junction Block Assembly)

Result:  NG

NG 

REPLACE INSTRUMENT PANEL JUNCTION BLOCK ASSEMBLY 

(See article. Refer to REMOVAL [08/2014 - ] )

Result:  OK

OK 

See step  2

1. Disconnect the K5 multiplex network master switch assembly connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   2A-27 (LIN2) - K5-17 (LIN1)	Always	Below 1 Ω
   2A-27 (LIN2) - Body ground	Always	10 kΩ or higher

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  3

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   K5-11 (B) - K5-12 (GND)	Power switch off	11 to 14 V

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   K5-12 (GND) - Body ground	Always	Below 1 Ω

Result:  NG

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR 

Result:  OK

OK 

See step  4

1. Replace the multiplex network master switch assembly (See article. Refer to REMOVAL [08/2014 - ] ).

Result:  NEXT

NEXT 

See step  5

1. Clear the DTC (See article. Refer to DTC CHECK / CLEAR [08/2014 - ] ).
2. Recheck for DTCs.

   OK

   DTC B1206 is not output.

Result:  OK

OK 

END (MULTIPLEX NETWORK MASTER SWITCH WAS DEFECTIVE) 

Result:  NG

NG 

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) 

(See article. Refer to REMOVAL [08/2014 - ] )