Multi-media Module Receiver Assembly Communication Stop Mode [08/2015 - 08/2019]: Procedure

1. Disconnect the cable from the negative (-) battery terminal before measuring the resistances of the CAN main wire and the CAN branch wire.
   WARNING:

   Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to disable the airbag system.

   NOTE:

   • w/ Navigation System:

     After the engine switch is turned off, the multi-media module receiver assembly records various types of memory and settings. As a result, after turning the engine switch off, be sure to wait for the time specified in the following table before disconnecting the cable from the negative (-) battery terminal.

     WAITING TIME BEFORE DISCONNECTING CABLE FROM NEGATIVE (-) BATTERY TERMINAL
     
     

     Condition	Waiting Time
     Vehicle enrolled in safety connect system	6 minutes
     Vehicle not enrolled in safety connect system	1 minute

   • When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to PRECAUTION [08/2015 - ] ).

Result: 

NEXT 

See step  2

1. Disconnect the H11*1 or H3*2 multi-media module receiver assembly connector.
   1. *1: w/ Navigation System
   2. *2: w/o Navigation System

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

   Standard Resistance

   W/ NAVIGATION SYSTEM
   
   

   Tester Connection	Switch Condition	Specified Condition
   H11-1 (CANH) - H11-2 (CANL)	Engine switch off	54 to 69 Ω

   W/O NAVIGATION SYSTEM
   
   

   Tester Connection	Switch Condition	Specified Condition
   H3-9 (CANH) - H3-10 (CANL)	Engine switch off	54 to 69 Ω

   TEXT IN ILLUSTRATION
   
   

   *A	w/ Navigation System
   *B	w/o Navigation System
   *a	Front view of wire harness connector (to Multi-media Module Receiver Assembly)

Result: 

NG 

REPAIR OR REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY CAN BRANCH WIRE OR CONNECTOR (CANH, CANL) 

Result: 

OK 

See step  3

1. Connect the cable to the negative (-) battery terminal.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *A	w/ Navigation System	*B	w/o Navigation System
   *a	Front view of wire harness connector (to Multi-media Module Receiver Assembly)	-	-

   NOTE:

   When disconnecting the cable, some systems need to be initialized after the cable is reconnected (Refer to INITIALIZATION [08/2015 - 08/2019] ).

2. w/o Navigation System:

   Disconnect the H2 multi-media module receiver assembly connector.

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

   Standard Resistance

   W/ NAVIGATION SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   H11-12 (GND1) - Body ground	Always	Below 1 Ω

   W/O NAVIGATION SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   H2-7 (GND1) - Body ground	Always	Below 1 Ω

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

   Standard Voltage

   W/ NAVIGATION SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   H11-17 (+B1) - Body ground	Always	11 to 14 V
   H11-15 (IG) - Body ground	Engine switch on (IG)	11 to 14 V
   H11-16 (ACC1) - Body ground	Engine switch on (ACC)	11 to 14 V

   W/O NAVIGATION SYSTEM
   
   

   Tester Connection	Condition	Specified Condition
   H2-4 (+B1) - Body ground	Always	11 to 14 V
   H2-3 (ACC1) - Body ground	Engine switch on (ACC)	11 to 14 V
   H3-1 (IG) - Body ground	Engine switch on (IG)	11 to 14 V

Result: 

OK 

REPLACE MULTI-MEDIA MODULE RECEIVER ASSEMBLY 

(Refer to REMOVAL [08/2015 - 08/2021] )

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR