Inspection Procedure

1. Turn the power switch ON (IG) and check that the power window can be operated using the multiplex network master switch.

   OK: 

   Power window can be operated using multiplex network master switch. 

OK: REPLACE MULTIPLEX NETWORK MASTER SWITCH 

NG: GO TO Next Step 

1. Disconnect the Q13 switch connector.
2. Measure the voltage of the wire harness side connector.

   Standard voltage 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Connection
   Q13-9 (CPUB) - Body ground	10 to 14 V

   Fig 1: Identifying Q13 Multiplex Network Master Switch Connector Terminals

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

NG: REPAIR OR REPLACE HARNESS OR CONNECTOR 

OK: GO TO Next Step 

Fig 2: Identifying M9 And K73 ECU Connector Terminals

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

1. Disconnect the M9 and K73 ECU connectors.
2. Disconnect the Q13 switch connector.
3. Measure the resistance of the wire harness side connectors.

   Standard resistance 

   TESTER CONNECTION SPECIFIED CONDITION
   
   

   Tester Connection	Specified Condition
   Q13-7 (MPX1) - K73-7 (MPX1)	Below 1 Ω
   Q13-8 (MPX2) - M9-8 (MPX1)	Below 1 Ω

   Result 

   RESULT REFERENCE CHART
   
   

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

B: REPAIR OR REPLACE MULTIPLEX MASTER SWITCH AND WIRE HARNESS OR CONNECTOR 

C: REPAIR OR REPLACE HARNESS OR CONNECTOR 

A: REPLACE MULTIPLEX NETWORK MASTER SWITCH