Check Bus 3 Line for Short to GND [10/2015 - ]: Procedure

1. Disconnect the cable from the negative (-)auxiliary battery terminal.
2. Disconnect the D133 No. 8 CAN junction connector.
3. Measure the resistance according to the value(s) in the table below.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *1	DLC3	-	-
   *a	Front view of wire harness connector (to No. 8 CAN Junction Connector)	*b	to Central Gateway ECU (CA3H and CA3L Terminal)
   *c	to Central Gateway ECU (CAYH and CAYL Terminal)	*d	to Navigation ECU Sub-assembly (for Navigation Receiver Type)
   *e	to Radio and Display Receiver Assembly (for Radio and Display Type)	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   D133-9 (CANH) - D28-4 (CG)	Cable disconnected from negative (-)auxiliary battery terminal	200 Ω or higher	Central gateway ECU (CA3H and CA3L terminal)
   D133-20 (CANL) - D28-4 (CG)
   D133-10 (CANH) - D28-4 (CG)	Cable disconnected from negative (-)auxiliary battery terminal	200 Ω or higher	Central gateway ECU (CAYH and CAYL terminal)
   D133-21 (CANL) - D28-4 (CG)
   D133-11 (CANH) - D28-4 (CG)	Cable disconnected from negative (-)auxiliary battery terminal	200 Ω or higher	Navigation ECU Sub-assembly*1
   D133-22 (CANL) - D28-4 (CG)
   D133-11 (CANH) - D28-4 (CG)	Cable disconnected from negative (-)auxiliary battery terminal	200 Ω or higher	Radio and display receiver assembly*2
   D133-22 (CANL) - D28-4 (CG)

   • *1: for Navigation Receiver Type
   • *2: for Radio and Display Type

   Result

   Result	Proceed to
   OK	A
   NG (Central gateway ECU (CA3H and CA3L terminal) main line)	B
   NG (Central gateway ECU (CAYH and CAYL terminal) main line)	C
   NG (ECU or sensor branch line)	D

Result: 

A 

REPLACE NO. 8 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

D 

See step  4

Result: 

B 

See step  2

1. Reconnect the D133 No. 8 CAN junction connector.
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
   D129-6 (CA3H) - D129-10 (GND)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   D129-21 (CA3L) - D129-10 (GND)

   Result

   Result
   OK
   NG

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Reconnect the D133 No. 8 CAN junction connector.
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
   D129-19 (CAYH) - D129-10 (GND)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   D129-20 (CAYL) - D129-10 (GND)

   Result

   Result
   OK
   NG

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 8 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Reconnect the D133 No. 8 CAN junction connector.
2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to ground.

   HINT: 

   If the ECU or sensor has multiple connectors, disconnect the connector that includes the CAN bus lines. To determine the ECU or sensor that is connected to the shorted bus line, refer to Terminals of ECU.

   Refer to TERMINALS OF ECU [10/2015 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D129-6 (CA3H) - D129-10 (GND)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   D129-21 (CA3L) - D129-10 (GND)

   HINT: 

   If the resistance changes to 200 Ω or higher when the connector is disconnected from the ECU or sensor, there may be a short in the ECU or sensor.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Central Gateway ECU)

   Result

   Result
   OK
   NG

Result: 

OK 

REPLACE CORRESPONDING ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR