Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CBON |
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 1 Main Bus Line; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] |
Open in Bus 1 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 23 (CA1H) and 8 (CA1L) 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 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
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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
w/ Blind Spot Monitor System
w/o Blind Spot Monitor System
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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w/ Blind Spot Monitor System
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A
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w/o Blind Spot Monitor System
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B
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A
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|
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2.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I91 No. 1 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. 1 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 No. 1 Junction Connector
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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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I91-1 (CANH) - I91-7 (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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I91-6 (CANH) - I91-12 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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No. 1 junction connector
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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 No. 1 junction connector)
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C
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A |
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REPLACE NO. 1 CAN JUNCTION CONNECTOR
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B
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|
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3.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the I91 No. 1 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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I53-23 (CA1H) - I53-8 (CA1L)
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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 Central Gateway ECU (Network Gateway ECU))
|
|
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NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
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4.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 JUNCTION CONNECTOR)
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(a) Reconnect the I91 No. 1 CAN junction connector.
(b) Disconnect the O101 No. 1 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. 1 Junction Connector)
|
*b
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to No. 1 CAN Junction Connector
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*c
|
to CAN Junction Terminal
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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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O101-1 (CANH) - O101-12 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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No. 1 CAN junction connector
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O101-3 (CANH) - O101-14 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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CAN junction terminal
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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 No. 1 CAN junction connector)
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B
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NG (Line to CAN junction terminal)
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C
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A |
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REPLACE NO. 1 JUNCTION CONNECTOR
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B |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)
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C
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5.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CAN JUNCTION TERMINAL - NO. 1 JUNCTION CONNECTOR)
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(a) Reconnect the O101 No. 1 junction connector.
(b) Disconnect the O95 CAN junction terminal 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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O95-3 (CANH) - O95-2 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
|
|
|
*a
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Front view of wire harness connector
(to CAN Junction Terminal)
|
|
|
OK |
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REPLACE CAN JUNCTION TERMINAL
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NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CAN JUNCTION TERMINAL - NO. 1 JUNCTION CONNECTOR)
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6.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I91 No. 1 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. 1 CAN Junction Connector)
|
*b
|
to Central Gateway ECU (Network Gateway ECU)
|
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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I91-1 (CANH) - I91-7 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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I91-6 (CANH) - I91-12 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
|
OK |
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REPLACE NO. 1 CAN JUNCTION CONNECTOR
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NG
|
|
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7.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the I91 No. 1 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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I53-23 (CA1H) - I53-9 (CAXH)
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Cable disconnected from negative (-) battery terminal
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Below 1 Ω
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I53-8 (CA1L) - I53-24 (CAXL)
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Cable disconnected from negative (-) battery terminal
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Below 1 Ω
|
|
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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. 1 CAN JUNCTION CONNECTOR)
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