Check Bus 2 Line for Short to GND [06/2020 - 08/2020]: Procedure

1. Disconnect the cable from the negative (-) auxiliary battery terminal.
2. Disconnect the No. 3 CAN junction connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to No. 3 CAN Junction Connector)	*b	to Central Gateway ECU (Network Gateway ECU)
   *c	to Inverter with Converter Assembly (for AWD)	*d	to ECM
   *e	to Inverter with Converter Assembly	*f	to Hybrid Vehicle Control ECU Assembly
   *g	to Brake Booster with Master Cylinder Assembly (Skid Control ECU)	*h	to Vehicle Approaching Speaker Controller (w/ Vehicle Proximity Notification System)
   *i	to Battery ECU Assembly (for LITHIUM-ION BATTERY)	*j	Front view of DLC3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition	Connected to
   G103-1 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Central gateway ECU (network gateway ECU)
   G103-11 (CANL) - G114-4 (CG)
   G103-2 (CANH) - G114-4 (CG)*1	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inverter with converter assembly
   G103-12 (CANL) - G114-4 (CG)*1
   G103-3 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	ECM
   G103-13 (CANL) - G114-4 (CG)
   G103-4 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Inverter with converter assembly
   G103-14 (CANL) - G114-4 (CG)
   G103-5 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Hybrid vehicle control ECU assembly
   G103-15 (CANL) - G114-4 (CG)
   G103-7 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Brake booster with master cylinder assembly (skid control ECU)
   G103-17 (CANL) - G114-4 (CG)
   G103-8 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Vehicle approaching speaker controller*2
   G103-18 (CANL) - G114-4 (CG)
   G103-10 (CANH) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher	Battery ECU assembly*3
   G103-20 (CANL) - G114-4 (CG)

   *1: for AWD

   *2: w/ Vehicle Proximity Notification System

   *3: for LITHIUM-ION BATTERY

   Result

   Result	Proceed to
   OK	A
   NG (Central gateway ECU [network gateway ECU] CAN main wire)	B
   NG (Wire to ECU or sensor)	C

Result: 

A 

REPLACE NO. 3 CAN JUNCTION CONNECTOR 

Result: 

C 

See step  3

Result: 

B 

See step  2

1. Reconnect the G103 No. 3 CAN junction connector.
2. Disconnect the central gateway ECU (network gateway ECU) connector.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Front view of wire harness connector (to Central Gateway ECU [Network Gateway ECU])
   *b	Front view of DLC3

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G72-18 (CA4H) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   G72-17 (CA4L) - G114-4 (CG)

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) 

Refer to REMOVAL [10/2019 - 08/2020]

Result: 

NG 

REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (CENTRAL GATEWAY ECU [NETWORK GATEWAY ECU] - NO. 3 CAN JUNCTION CONNECTOR) 

1. Reconnect all wire harness connectors.
2. Disconnect the connector that includes terminals CANH and CANL from the ECU or sensor to which the bus line shorted to GND is connected.

   Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

   *a	Component with harness connected (Central Gateway ECU [Network Gateway ECU])
   *b	Front view of DLC3

   Refer to TERMINALS OF ECU [06/2020 - 08/2020]

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

   Standard Resistance

   Tester Connection	Condition	Specified Condition
   G72-18 (CA4H) - G114-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
   G72-17 (CA4L) - G114-4 (CG)

   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.
   • If the resistance does not become normal when the connector is disconnected from the ECU or sensor, check for a short to GND in the wire harness and repair or replace the wire harness or connector if necessary.

   Result

   Proceed to
   OK
   NG

Result: 

OK 

REPLACE ECU OR SENSOR 

Result: 

NG 

REPAIR OR REPLACE HARNESS OR CONNECTOR