Power Back Door ECU Communication Stop Mode [12/2019 - 10/2022]: Procedure

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the W18 multiplex network door ECU connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W18-39 (CANP) - W18-40 (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 W19 multiplex network door ECU connector.
2. Measure the resistance according to the value(s) in the table below.

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   W19-10 (GND) - Body ground	Cable disconnected from negative (-) battery terminal	Below 1 Ω

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

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

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
   W18-20 (ECUB) - Body ground	Always	11 to 14 V
   W19-1 (B) - Body ground	Always	11 to 14 V
   W18-18 (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 [12/2019 - 11/2023]

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)