Inspection Procedure

1. Remove the multiplex network master switch with connector still connected.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY
   
   

   Switch Condition	Tester Connection	Specified Condition
   H6-15 (PCT) - Body ground	Window lock switch is OFF -> ON	0 V -> 2 V or less
   H6-13 (TX) - Body ground	Ignition switch ON	10 to 14 V

   Fig 1: Checking Multiplex Network Master Switch Assembly

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPLACE MULTIPLEX NETWORK MASTER SWITCH ASSEMBLY 

OK: Go to next step 

1. Disconnect the H6 and G6 connectors.
2. Measure the resistance of the wire harness side connector.

   Standard resistance 

   MULTIPLEX NETWORK MASTER SWITCH - MULTIPLEX NETWORK SWITCH
   
   

   Switch Condition	Tester Connection	Specified Condition
   H6-15 (PCT) - G6-11 (PCT)	Always	Below 1 Ω
   H6-15 (PCT) - Body ground	Always	10 kΩ or higher
   H6-13 (TX) - G6-2 (RX)	Always	Below 1 Ω
   H6-13 (TX) - Body ground	Always	10 kΩ or higher

   Fig 2: Checking Wire Harness (Multiplex Network Master Switch - Multiplex Network Switch)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS AND CONNECTOR 

OK: PROCEED TO NEXT CIRCUIT INSPECTION SHOWN IN  PROBLEM SYMPTOMS TABLE