NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 5 Line; 2024 - 2025 MY Corolla Corolla HV [08/2023 - ]

Last Modified: 05-13-2024	6.11:8.1.0	Doc ID: RM100000002DQ9W
Model Year Start: 2024	Model: Corolla	Prod Date Range: [08/2023 - ]
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Check Bus 5 Line; 2024 - 2025 MY Corolla Corolla HV [08/2023 - ]

Check Bus 5 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) Air conditioning amplifier assembly Certification ECU (smart key ECU assembly) (w/ Smart Key System) Main body ECU (multiplex network body ECU) No. 12 CAN junction connector No. 17 CAN junction connector

WIRING DIAGRAM

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 (-) auxiliary battery terminal and leave the vehicle for 1 minute or more before measuring the resistance.
After the ignition switch is turned off, there may be a waiting time before disconnecting the negative (-) auxiliary battery terminal.
Click here
When disconnecting and reconnecting the auxiliary battery.
HINT:

When disconnecting and reconnecting the auxiliary 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
Before replacing the main body ECU (multiplex network body ECU) or certification ECU (smart key ECU assembly), refer to Registration.
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 FOR OPEN IN CAN MAIN BUS LINES

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

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I173-7 (CA5H) - I173-8 (CA5L)	Cable disconnected from negative (-) auxiliary battery terminal	Below 70 Ω

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

NG

OK

2.	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
I173-7 (CA5H) - I173-8 (CA5L)	Cable disconnected from negative (-) auxiliary battery terminal	54 Ω or higher

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

NG

OK

3.	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
I173-7 (CA5H) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I173-8 (CA5L) - I26-16 (BAT)		6 kΩ or higher

NG

OK

4.	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
I173-7 (CA5H) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I173-8 (CA5L) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

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

(a) Disconnect the I237 No. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-14 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

6.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to No. 12 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-4 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-15 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

7.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Smart Key System	A
w/o Smart Key System	B

B

A

8.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-12 (CANL) - I26-4 (CG)		200 Ω or higher

NG

OK

9.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-13 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE NO. 17 CAN JUNCTION CONNECTOR

NG

10.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-14 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

11.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the I167 certification ECU (smart key ECU assembly) 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. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-12 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

12.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the I49 air conditioning amplifier assembly 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. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
I237-13 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

13.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

(a) Disconnect the A180 No. 12 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. 12 CAN Junction Connector)

*b

to No. 17 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-2 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A180-13 (CANL) - I26-4 (CG)		200 Ω or higher

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

OK

14.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A180-12 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE NO. 12 CAN JUNCTION CONNECTOR

NG

15.	CHECK FOR SHORT TO GND IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I85 main body ECU (multiplex network body 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. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - I26-4 (CG)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher
A180-12 (CANL) - I26-4 (CG)		200 Ω or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

(a) Disconnect the I237 No. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-14 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

17.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to No. 12 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-4 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-15 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

18.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Smart Key System	A
w/o Smart Key System	B

B

A

19.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

OK

20.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE NO. 17 CAN JUNCTION CONNECTOR

NG

21.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-14 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

22.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the I167 certification ECU (smart key ECU assembly) 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. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

23.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the I49 air conditioning amplifier assembly 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. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
I237-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE CAN BRANCH LINE OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

24.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

(a) Disconnect the A180 No. 12 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. 12 CAN Junction Connector)

*b

to No. 17 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-2 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A180-13 (CANL) - I26-16 (BAT)		6 kΩ or higher

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

OK

25.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

*1

DLC3

-

-

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A180-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE NO. 12 CAN JUNCTION CONNECTOR

NG

26.	CHECK FOR SHORT TO +B IN CAN BUS LINE (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I85 main body ECU (multiplex network body 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. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - I26-16 (BAT)	Cable disconnected from negative (-) auxiliary battery terminal	6 kΩ or higher
A180-12 (CANL) - I26-16 (BAT)		6 kΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINE OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

27.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

(a) Disconnect the I237 No. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I237-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

OK

28.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR)

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to No. 12 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-4 (CANH) - I237-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

OK

29.	CHECK VEHICLE TYPE

(a) Check vehicle type.

Result	Proceed to
w/ Smart Key System	A
w/o Smart Key System	B

B

A

30.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I237-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

NG

OK

31.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I237-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	200 Ω or higher

OK

REPLACE NO. 17 CAN JUNCTION CONNECTOR

NG

32.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I237-14 (CANL)	Cable disconnected from negative (-) auxiliary 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. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

33.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

(a) Disconnect the I167 certification ECU (smart key ECU assembly) connector.

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Certification ECU (Smart Key ECU Assembly)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-1 (CANH) - I237-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE CERTIFICATION ECU (SMART KEY ECU ASSEMBLY)

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))

34.	CHECK FOR SHORT IN CAN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

(a) Disconnect the I49 air conditioning amplifier assembly connector.

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to Air Conditioning Amplifier Assembly

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-2 (CANH) - I237-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE AIR CONDITIONING AMPLIFIER ASSEMBLY

NG

REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - AIR CONDITIONING AMPLIFIER ASSEMBLY)

35.	CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

(a) Reconnect the I237 No. 17 CAN junction connector.

(b) Disconnect the A180 No. 12 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. 12 CAN Junction Connector)

*b

to No. 17 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-2 (CANH) - A180-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

OK

36.	CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - A180-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

OK

REPLACE NO. 12 CAN JUNCTION CONNECTOR

NG

37.	CHECK FOR SHORT IN CAN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

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

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - A180-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	1 MΩ or higher

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

38.	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
I173-7 (CA5H) - I173-8 (CA5L)	Cable disconnected from negative (-) auxiliary 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

39.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

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

(b) Disconnect the I237 No. 17 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. 17 CAN Junction Connector)

*b

to Central Gateway ECU (Network Gateway ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-3 (CANH) - I237-14 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 17 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))

OK

40.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 17 CAN JUNCTION CONNECTOR - NO. 12 CAN JUNCTION CONNECTOR)

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

*a

Front view of wire harness connector

(to No. 17 CAN Junction Connector)

*b

to No. 12 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
I237-4 (CANH) - I237-15 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

OK

REPLACE NO. 17 CAN JUNCTION CONNECTOR

NG

41.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

(a) Reconnect the I237 No. 17 CAN junction connector.

(b) Disconnect the A180 No. 12 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. 12 CAN Junction Connector)

*b

to No. 17 CAN Junction Connector

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-2 (CANH) - A180-13 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 12 CAN JUNCTION CONNECTOR - NO. 17 CAN JUNCTION CONNECTOR)

OK

42.	CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 12 CAN JUNCTION CONNECTOR - MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

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

*a

Front view of wire harness connector

(to No. 12 CAN Junction Connector)

*b

to Main Body ECU (Multiplex Network Body ECU)

Standard Resistance:

Tester Connection	Condition	Specified Condition
A180-1 (CANH) - A180-12 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

OK

REPLACE NO. 12 CAN JUNCTION CONNECTOR

NG

43.	CHECK FOR OPEN IN CAN MAIN BUS LINES (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU))

(a) Reconnect the A180 No. 12 CAN junction connector.

(b) Disconnect the I85 main body ECU (multiplex network body ECU) connector.

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

Standard Resistance:

Tester Connection	Condition	Specified Condition
I85-2 (CANH) - I85-1 (CANL)	Cable disconnected from negative (-) auxiliary battery terminal	108 to 132 Ω

*a	Front view of wire harness connector (to Main Body ECU (Multiplex Network Body ECU))

OK

REPLACE MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU)

NG

REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (MAIN BODY ECU (MULTIPLEX NETWORK BODY ECU) - NO. 12 CAN JUNCTION CONNECTOR)