Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GVZR |
Model Year Start: 2020 |
Model: Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Open in Bus 3 Main Bus Line; 2020 - 2022 MY Corolla Corolla HV [01/2019 - 09/2022] |
Open in Bus 3 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 6 (CA3H) and 21 (CA3L) 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 6 (CA3H) and 21 (CA3L) 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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No. 6 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:
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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. 6 CAN JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I132 No. 6 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. 6 CAN Junction Connector)
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*b
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to Central Gateway ECU (Network Gateway ECU)
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Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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I132-1 (CANH) - I132-12 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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I132-2 (CANH) - I132-13 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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OK |
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REPLACE NO. 6 CAN JUNCTION CONNECTOR
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NG
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2.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 6 CAN JUNCTION CONNECTOR)
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(a) Reconnect the I132 No. 6 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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I53-6 (CA3H) - I53-19 (CAYH)
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Cable disconnected from negative (-) auxiliary battery terminal
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Below 1 Ω
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I53-21 (CA3L) - I53-20 (CAYL)
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Cable disconnected from negative (-) auxiliary 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))
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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. 6 CAN JUNCTION CONNECTOR)
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