NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 2 Line; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [03/2023 - ]

Last Modified: 07-31-2024	6.11:8.1.0	Doc ID: RM100000002B6E4
Model Year Start: 2023	Model: GR Corolla	Prod Date Range: [03/2023 - ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Check Bus 2 Line; 2023 - 2025 MY Corolla Corolla Hatchback GR Corolla [03/2023 - ]

Check Bus 2 Line

DESCRIPTION

Symptom	Trouble Area
There are ECUs or sensors that display a communication stop on the bus diagnostic screen. Or, there are ECUs or sensors that display communication stop history on the "Detail" screen.	CAN main bus line, CAN branch line or connector Central gateway ECU (network gateway ECU) ECM TCM (for CVT (K120)) No. 11 CAN junction connector (except G16E-GTS)

WIRING DIAGRAM

except G16E-GTS

for G16E-GTS

CAUTION / NOTICE / HINT

CAUTION:

When performing the confirmation driving pattern, obey all speed limits and traffic laws.

NOTICE:

Because the order of diagnosis is important to allow correct diagnosis, make sure to begin troubleshooting using How to Proceed with Troubleshooting when CAN communication system related DTCs are output.
Click here
Before measuring the resistance of the CAN bus, turn the ignition switch off and leave the vehicle for 1 minute or more without operating the key or any switches, or opening or closing the doors. After that, disconnect the cable from the negative (-) battery terminal and leave the vehicle for 10 minutes or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) battery terminal.
Click here
When disconnecting and reconnecting the battery.
HINT:

When disconnecting and reconnecting the battery, there is an automatic learning function that completes learning when the respective system is used.

Click here
Some parts must be initialized and set when replacing or removing and installing parts.
Click here
After performing repairs, perform the DTC check procedure and confirm that the DTCs are not output again.
DTC check procedure: Turn the ignition switch to ON and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
After the repair, perform the CAN bus check and check that all the ECUs and sensors connected to the CAN communication system are displayed as normal.
Click here

HINT:

Before disconnecting related connectors for inspection, push in on each connector body to check that the connector is not loose or disconnected.
When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.

PROCEDURE

1.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
except G16E-GTS	A
for G16E-GTS	B

B

A

2.	CHECK FOR OPEN IN CAN MAIN BUS LINES

(a) Disconnect the cable from the negative (-) battery terminal.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	Below 70 Ω

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

3.	CHECK FOR SHORT IN CAN BUS LINES

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	54 Ω or higher

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

4.	CHECK FOR SHORT TO +B IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I173-25 (CA4L) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

NG

OK

5.	CHECK FOR SHORT TO GND IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I173-25 (CA4L) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

6.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A147 No. 11 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-18 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

NG

OK

7.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - ECM)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-17 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

NG

OK

8.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
for CVT (K120)	A
for CVT (K121)	B

B

REPLACE NO. 11 CAN JUNCTION CONNECTOR

A

9.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - TCM)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-16 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE NO. 11 CAN JUNCTION CONNECTOR

NG

10.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-18 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

11.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 or A178 ECM connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-17 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - ECM)

12.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - TCM)

(a) Disconnect the C80 TCM connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A147-16 (CANL) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - TCM)

13.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A147 No. 11 CAN junction connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-18 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

NG

OK

14.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - ECM)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-17 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

NG

OK

15.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
for CVT (K120)	A
for CVT (K121)	B

B

REPLACE NO. 11 CAN JUNCTION CONNECTOR

A

16.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - TCM)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-16 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

REPLACE NO. 11 CAN JUNCTION CONNECTOR

NG

17.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-18 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

18.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 or A178 ECM connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-17 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - ECM)

19.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 11 CAN JUNCTION CONNECTOR - TCM)

(a) Disconnect the C80 TCM connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A147-16 (CANL) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - TCM)

20.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the A147 No. 11 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - A147-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

NG

OK

21.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - ECM)

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - A147-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

NG

OK

22.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
for CVT (K120)	A
for CVT (K121)	B

B

REPLACE NO. 11 CAN JUNCTION CONNECTOR

A

23.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - TCM)

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - A147-16 (CANL)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE NO. 11 CAN JUNCTION CONNECTOR

NG

24.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - A147-18 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

25.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - ECM)

(a) Disconnect the A47 or A178 ECM connector.

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - A147-17 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - ECM)

26.	CHECK FOR SHORT IN CAN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - TCM)

(a) Disconnect the C80 TCM connector.

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to TCM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-5 (CANH) - A147-16 (CANL)	Cable disconnected from negative (-) battery terminal	1 MΩ or higher

OK

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - TCM)

27.	CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

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

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

28.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Reconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Disconnect the A147 No. 11 CAN junction connector.

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-7 (CANH) - A147-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 11 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

OK

29.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 11 CAN JUNCTION CONNECTOR - ECM)

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

*a

Front view of wire harness connector

(to No. 11 CAN Junction Connector)

*b

to ECM

Standard Resistance:

Tester Connection	Condition	Specified Condition
A147-6 (CANH) - A147-17 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

OK

REPLACE NO. 11 CAN JUNCTION CONNECTOR

NG

30.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
for CVT (K120)	A
for CVT (K121)	B

B

A

31.	CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM)

(a) Reconnect the A147 No. 11 CAN junction connector.

(b) Disconnect the A47 ECM connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A47-8 (CANH) - A47-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

*a	Front view of wire harness connector (to ECM)

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 11 CAN JUNCTION CONNECTOR)

32.	CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM)

(a) Reconnect the A147 No. 11 CAN junction connector.

(b) Disconnect the A178 ECM connector.

*a

Front view of wire harness connector

(to ECM)

-

-

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
A178-4 (CANH) - A178-5 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NO. 11 CAN JUNCTION CONNECTOR)

33.	CHECK FOR OPEN IN CAN MAIN BUS LINES

(a) Disconnect the cable from the negative (-) battery terminal.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	Below 70 Ω

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

34.	CHECK FOR SHORT IN CAN BUS LINES

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	54 Ω or higher

*a	Component with harness connected (Central Gateway ECU (Network Gateway ECU))

NG

OK

35.	CHECK FOR SHORT TO +B IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I173-25 (CA4L) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

NG

OK

36.	CHECK FOR SHORT TO GND IN CAN BUS LINE

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

*1

DLC3

-

-

*a

Component with harness connected

(Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I173-25 (CA4L) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

37.	CHECK FOR SHORT TO GND IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
I173-25 (CA4L) - I26-4 (CG)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

38.	CHECK FOR SHORT TO GND IN CAN BUS LINE (ECM)

(a) Disconnect the A139 ECM connector.

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

*a

Front view of wire harness connector

(to ECM)

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
A139-8 (CANH) - A139-10 (E1)	Cable disconnected from negative (-) battery terminal	200 Ω or higher
A139-18 (CANL) - A139-10 (E1)	Cable disconnected from negative (-) battery terminal	200 Ω or higher

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

39.	CHECK FOR SHORT TO +B IN CAN BUS LINE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to Central Gateway ECU (Network Gateway ECU))

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
I173-25 (CA4L) - I26-16 (BAT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

40.	CHECK FOR SHORT TO +B IN CAN BUS LINE (ECM)

(a) Disconnect the A139 ECM connector.

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

*a

Front view of wire harness connector

(to ECM)

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
A139-8 (CANH) - A139-1 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher
A139-18 (CANL) - A139-1 (BATT)	Cable disconnected from negative (-) battery terminal	6 kΩ or higher

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

41.	CHECK FOR SHORT IN CAN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

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

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

42.	CHECK FOR SHORT IN CAN BUS LINES (ECM)

(a) Reconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Disconnect the A139 ECM connector.

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

*a

Front view of wire harness connector

(to ECM)

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
A139-8 (CANH) - A139-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

43.	CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I173 central gateway ECU (network gateway ECU) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-26 (CA4H) - I173-25 (CA4L)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

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

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

44.	CHECK FOR OPEN IN CAN MAIN BUS LINES (ECM)

(a) Reconnect the I173 central gateway ECU (network gateway ECU) connector.

(b) Disconnect the A139 ECM connector.

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

*a

Front view of wire harness connector

(to ECM)

-

-

Standard Resistance:

Tester Connection	Condition	Specified Condition
A139-8 (CANH) - A139-18 (CANL)	Cable disconnected from negative (-) battery terminal	108 to 132 Ω

OK

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))