Power Back Door ECU Communication Stop Mode [11/2023 - ]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the W30 multiplex network door ECU connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Multiplex Network Door ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W30-10 (CANP) - W30-20 (CANN)	Cable disconnected from negative (-) battery terminal	54 to 69 Ω

   Result

   Proceed to
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (MULTIPLEX NETWORK DOOR ECU) 

Result: 

OK 

See step  2

1. Disconnect the W27 and W28 multiplex network door ECU connectors.
2. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a

   Front view of wire harness connector (to Multiplex Network Door ECU)

   -

   -

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W28-4 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

3. Reconnect the cable to the negative (-) battery terminal.
4. Measure the voltage according to the value(s) in the table below.

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   W27-5 (B) - Body ground	Always	11 to 14 V
   W30-7 (ECUB) - Body ground	Always	11 to 14 V
   W30-9 (IG) - Body ground	Ignition switch ON	11 to 14 V

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE MULTIPLEX NETWORK DOOR ECU 

Refer to REMOVAL [11/2023 - ]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)