Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CBOH |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Certification ECU Communication Stop Mode; 2019 - 2022 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 09/2022] |
Certification ECU Communication Stop Mode
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DESCRIPTION
Detection Item
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Symptom
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Trouble Area
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Certification ECU Communication Stop Mode
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Any of the following conditions are met:
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Certification ECU (smart key ECU assembly) branch line or connector
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Power source circuit of certification ECU (smart key ECU assembly)
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Certification ECU (smart key ECU assembly) ground circuit
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Certification ECU (smart key ECU assembly)
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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 BUS LINES (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY) BRANCH LINE)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the I1 certification ECU (smart key ECU 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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I1-1 (CANH) - I1-2 (CANL)
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Cable disconnected from negative (-) battery terminal
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54 to 69 Ω
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*a
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Front view of wire harness connector
(to Certification ECU (Smart Key ECU Assembly))
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NG |
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REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (CERTIFICATION ECU (SMART KEY ECU ASSEMBLY))
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OK
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2.
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CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
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(a) 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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I1-18 (E) - Body ground
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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 Certification ECU (Smart Key ECU Assembly))
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(b) Reconnect the cable to the negative (-) battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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I1-3 (+B) - Body ground
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Always
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11 to 14 V
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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