Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CBP2 |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 01/2019] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Open in Bus 4 Main Bus Line; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] |
Open in Bus 4 Main Bus Line
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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
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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.
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-
CAN main bus lines or connector
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Central gateway ECU (network gateway ECU)
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Airbag sensor assembly
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No. 5 CAN junction connector
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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
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.
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When a connector is disconnected, check that the terminals and connector body are not cracked, deformed or corroded.
PROCEDURE
1.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR)
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(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
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Front view of wire harness connector
(to No. 5 CAN Junction Connector)
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*b
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to Central Gateway ECU (Network Gateway ECU)
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*c
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to Airbag Sensor Assembly
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-
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-
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Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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Connected to
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I96-2 (CANH) - I96-8 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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Central gateway ECU (network gateway ECU)
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I96-3 (CANH) - I96-9 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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Airbag sensor assembly
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Result
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Proceed to
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OK
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A
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NG (Line to central gateway ECU (network gateway ECU))
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B
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NG (Line to airbag sensor assembly)
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C
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A |
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REPLACE NO. 5 CAN JUNCTION CONNECTOR
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B
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|
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2.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
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(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
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Condition
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Specified Condition
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I53-22 (CA2H) - I53-7 (CA2L)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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|
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*a
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Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
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3.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (AIRBAG SENSOR ASSEMBLY - NO. 5 CAN JUNCTION CONNECTOR)
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(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
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Condition
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Specified Condition
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I47-26 (CANH) - I47-27 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
|
|
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*a
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Front view of wire harness connector
(to Airbag Sensor Assembly)
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (AIRBAG SENSOR ASSEMBLY - NO. 5 CAN JUNCTION CONNECTOR)
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