Central Gateway ECU Communication Stop Mode [10/2015 - ]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the D129 central gateway 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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D129-18 (CA4H) - D129-17 (CA4L)	Cable disconnected from negative (-) auxiliary battery terminal	54 to 69 Ω

   Result

   Result
   OK
   NG

Result: 

NG 

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (CENTRAL GATEWAY ECU) 

Result: 

OK 

See step  2

1. 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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D129-10 (GND) - Body ground	Cable disconnected from negative (-) auxiliary battery terminal	Below 1 Ω

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

   Standard Voltage

   Tester Connection	Condition	Specified Condition
   D129-1 (BATT) - Body ground	Power switch off	11 to 14 V
   D129-2 (ACC) - Body ground	Power switch on (ACC)	11 to 14 V
   D129-11 (IG1) - Body ground	Power switch on (IG)	11 to 14 V
   D129-12 (IG2) - Body ground	Power switch on (IG)	11 to 14 V

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Central Gateway ECU)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU. Refer to  REMOVAL [10/2015 - ] 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)