Check Bus 5 Line for Short to GND [10/2015 - ]: Procedure

1. Choose the model to be inspected.

   	Proceed to
   for Models with Blind Spot Monitor System or Parking Assist Monitor System	A
   for Models without Blind Spot Monitor System and Parking Assist Monitor System	B

Result: 

B 

See step  7

Result: 

A 

See step  2

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the D131 No. 6 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. 6 CAN Junction Connector)	*b	to No. 5 CAN Junction Connector
   *c	to Millimeter Wave Radar Sensor Assembly	*d	to Forward Recognition Camera
   *e	to Driving Support ECU Assembly	*f	to Central Gateway ECU (CAXH and CAXL Terminal)

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   D131-1 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	No. 5 CAN junction connector
   D131-11 (CANL) - D28-4 (CG)
   D131-2 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Millimeter wave radar sensor assembly*
   D131-12 (CANL) - D28-4 (CG)
   D131-3 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Forward recognition camera*
   D131-13 (CANL) - D28-4 (CG)
   D131-8 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Driving support ECU assembly*
   D131-18 (CANL) - D28-4 (CG)
   D131-10 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Central gateway ECU (CAXH and CAXL terminal)
   D131-20 (CANL) - D28-4 (CG)

   • *: w/ Toyota Safety Sense

   	Proceed to
   OK	A
   NG (No. 5 CAN junction connector main lines)	B
   NG (Central gateway ECU (CAXH and CAXL terminal) main lines)	C
   NG (ECU or sensor branch lines)	D

Result: 

A 

REPLACE NO. 6 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  5

Result: 

D 

See step  6

Result: 

B 

See step  3

1. Disconnect the O20 No. 5 CAN junction connector.
2. 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. 5 CAN Junction Connector)	*b	to Rear Television Camera Assembly (w/ Parking Assist Monitor System)
   *c	to Central Gateway ECU (CA5H and CA5L Terminal)	*d	to Blind Spot Monitor Sensor LH (w/ Blind Spot Monitor System)
   *e	to No. 6 CAN Junction Connector	-	-

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   O20-7 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Rear television camera assembly*1
   O20-17 (CANL) - D28-4 (CG)
   O20-8 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Central gateway ECU (CA5H and CA5L terminal)
   O20-18 (CANL) - D28-4 (CG)
   O20-9 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Blind spot monitor sensor LH*2
   O20-19 (CANL) - D28-4 (CG)
   O20-10 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	No. 6 CAN junction connector
   O20-20 (CANL) - D28-4 (CG)

   • *1: w/ Parking Assist Monitor System
   • *2: w/ Blind Spot Monitor System

   	Proceed to
   OK	A
   NG (No. 6 CAN junction connector main lines)	B
   NG (Central gateway ECU (CA5H and CA5L terminal) main lines)	C
   NG (ECU or sensor branch lines)	D

Result: 

A 

REPLACE NO. 5 CAN JUNCTION CONNECTOR 

Result: 

B 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - NO. 5 CAN JUNCTION CONNECTOR) 

Result: 

D 

See step  6

Result: 

C 

See step  4

1. Disconnect the D127 central gateway ECU connector.
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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-15 (CA5H) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-16 (CA5L) - D127-10 (GND)

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Disconnect the D127 central gateway ECU connector.
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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-9 (CAXH) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-24 (CAXL) - D127-10 (GND)

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Reconnect all wire harness connectors.
2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to GND.

   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 [10/2015 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-15 (CA5H) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-16 (CA5L) - D127-10 (GND)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Central Gateway ECU)

   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.

Result: 

OK 

REPLACE CORRESPONDING ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR 

1. Disconnect the cable from the negative (-) battery terminal.
2. Disconnect the D131 No. 6 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. 6 CAN Junction Connector)	*b	to Millimeter Wave Radar Sensor Assembly
   *c	to Forward Recognition Camera	*d	to Driving Support ECU Assembly
   *e	to Central Gateway ECU (CA5H and CA5L Terminal)	*f	to Central Gateway ECU (CAXH and CAXL Terminal)

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   D131-2 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Millimeter wave radar sensor assembly*
   D131-12 (CANL) - D28-4 (CG)
   D131-3 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Forward recognition camera*
   D131-13 (CANL) - D28-4 (CG)
   D131-8 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Driving support ECU assembly*
   D131-18 (CANL) - D28-4 (CG)
   D131-9 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Central gateway ECU (CA5H and CA5L terminal)
   D131-19 (CANL) - D28-4 (CG)
   D131-10 (CANH) - D28-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher	Central gateway ECU (CAXH and CAXL terminal)
   D131-20 (CANL) - D28-4 (CG)

   • *: w/ Toyota Safety Sense

   	Proceed to
   OK	A
   NG (Central gateway ECU (CA5H and CA5L terminal) main lines)	B
   NG (Central gateway ECU (CAXH and CAXL terminal) main lines)	C
   NG (ECU or sensor branch lines)	D

Result: 

A 

REPLACE NO. 6 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  9

Result: 

D 

See step  10

Result: 

B 

See step  8

1. Disconnect the D127 central gateway ECU connector.
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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-15 (CA5H) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-16 (CA5L) - D127-10 (GND)

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Disconnect the D127 central gateway ECU connector.
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 Central Gateway ECU)

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-9 (CAXH) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-24 (CAXL) - D127-10 (GND)

Result: 

OK 

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

Result: 

NG 

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 6 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU) 

1. Reconnect all wire harness connectors.
2. Disconnect the ECU or sensor connected to the CAN bus line that is shorted to GND.

   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 [10/2015 - ]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   D127-15 (CA5H) - D127-10 (GND)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
   D127-16 (CA5L) - D127-10 (GND)

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Central Gateway ECU)

   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.

Result: 

OK 

REPLACE CORRESPONDING ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE CORRESPONDING ECU OR SENSOR BUS LINE OR CONNECTOR