Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GMBB |
Model Year Start: 2020 |
Model: GR Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Open in Bus 4 Main Bus Line; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] |
Open in Bus 4 Main Bus Line
|
DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom
|
Trouble Area
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Resistance between terminals 22 (CA2H) and 7 (CA2L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
|
-
CAN main bus lines or connector
-
Central gateway ECU (network gateway ECU)
-
Airbag sensor assembly
-
No. 5 CAN junction connector
(for Hatchback)
-
No. 4 CAN junction connector
(for Sedan)
-
No. 1 junction connector
(for Sedan)
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This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.
WIRING DIAGRAM
for Hatchback
for Sedan
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
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
(a) Check vehicle type.
Result
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Proceed to
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for Hatchback
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A
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for Sedan
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B
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A
|
|
|
2.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR)
|
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I96 No. 5 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. 5 CAN Junction Connector)
|
*b
|
to Central Gateway ECU (Network Gateway ECU)
|
*c
|
to Airbag Sensor Assembly
|
-
|
-
|
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
Connected to
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I96-2 (CANH) - I96-8 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
Central gateway ECU (network gateway ECU)
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I96-3 (CANH) - I96-9 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
Airbag sensor assembly
|
Result
|
Proceed to
|
OK
|
A
|
NG (Line to central gateway ECU (network gateway ECU))
|
B
|
NG (Line to airbag sensor assembly)
|
C
|
A |
|
REPLACE NO. 5 CAN JUNCTION CONNECTOR
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B
|
|
|
3.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the I96 No. 5 CAN junction connector.
(b) Disconnect the I53 central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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I53-22 (CA2H) - I53-7 (CA2L)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
|
4.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (AIRBAG SENSOR ASSEMBLY - NO. 5 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the I96 No. 5 CAN junction connector.
(b) Disconnect the I47 airbag sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I47-26 (CANH) - I47-27 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Airbag Sensor Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG SENSOR ASSEMBLY - NO. 5 CAN JUNCTION CONNECTOR)
|
5.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the O118 No. 1 junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a
|
Front view of wire harness connector
(to No. 1 Junction Connector)
|
*b
|
to Central Gateway ECU (Network Gateway ECU)
|
*c
|
to No. 4 CAN Junction Connector
|
-
|
-
|
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
Connected to
|
O118-9 (CANH) - O118-20 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
Central gateway ECU (network gateway ECU)
|
O118-11 (CANH) - O118-22 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
No. 4 CAN junction connector
|
Result
|
Proceed to
|
OK
|
A
|
NG (Line to central gateway ECU (network gateway ECU))
|
B
|
NG (Line to No. 4 CAN junction connector)
|
C
|
A |
|
REPLACE NO. 1 JUNCTION CONNECTOR
|
B
|
|
|
6.
|
CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 JUNCTION CONNECTOR)
|
(a) Reconnect the O118 No. 1 junction connector.
(b) Disconnect the I53 central gateway ECU (network gateway ECU) connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I53-22 (CA2H) - I53-7 (CA2L)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 JUNCTION CONNECTOR)
|
7.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 4 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the O118 No. 1 junction connector.
(b) Disconnect the I95 No. 4 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. 4 CAN Junction Connector)
|
*b
|
to Airbag Sensor Assembly
|
*c
|
to No. 1 Junction Connector
|
-
|
-
|
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
Connected to
|
I95-3 (CANH) - I95-14 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
Airbag sensor assembly
|
I95-4 (CANH) - I95-15 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
No. 1 junction connector
|
Result
|
Proceed to
|
OK
|
A
|
NG (Line to airbag sensor assembly)
|
B
|
NG (Line to No. 1 junction connector)
|
C
|
A |
|
REPLACE NO. 4 CAN JUNCTION CONNECTOR
|
C |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 4 CAN JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
|
B
|
|
|
8.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (AIRBAG SENSOR ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the I95 No. 4 CAN junction connector.
(b) Disconnect the I47 airbag sensor assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
I47-26 (CANH) - I47-27 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Airbag Sensor Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG SENSOR ASSEMBLY - NO. 4 CAN JUNCTION CONNECTOR)
|
|