Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001O5YL |
Model Year Start: 2021 |
Model: Corolla |
Prod Date Range: [04/2020 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for HV Model): Hybrid Vehicle Control ECU Communication Stop Mode; 2021 - 2022 MY Corolla Corolla HV [04/2020 - 09/2022] |
Hybrid Vehicle Control 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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Hybrid Vehicle Control ECU Communication Stop Mode
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Any of the following conditions are met:
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Communication stop for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
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Communication stop history for "Hybrid Vehicle Control" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "Hybrid Vehicle Control" is 6 or more.)
Click here
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Communication system DTCs (DTCs that start with U) that correspond to "Hybrid Vehicle Control ECU Communication Stop Mode" in "DTC Combination Table" are output.
Click here
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Hybrid vehicle control ECU branch line or connector
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Power source circuit of hybrid vehicle control ECU
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Hybrid vehicle control ECU ground circuit
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Hybrid vehicle control ECU
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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 (HYBRID VEHICLE CONTROL ECU BRANCH LINE)
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(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the I2 hybrid vehicle control 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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I2-21(CA1H) - I2-8(CA1L)
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Cable disconnected from negative (-) auxiliary battery terminal
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54 to 69 Ω
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I2-7(CA3P) - I2-20(CA3N)
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Cable disconnected from negative (-) auxiliary 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 Hybrid Vehicle Control ECU)
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NG |
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REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (HYBRID VEHICLE CONTROL ECU)
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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) Disconnect the I3 hybrid vehicle control ECU connector.
(b) Reconnect the cable to the negative (-) auxiliary battery terminal.
(c) Measure the voltage according to the value(s) in the table below.
*a
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Front view of wire harness connector
(to Hybrid Vehicle Control ECU)
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-
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-
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Standard Voltage:
Tester Connection
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Condition
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Specified Condition
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I3-27 (BATT) - Body ground
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Power switch off
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11 to 14 V
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I2-35 (IG2) - Body ground
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Power switch on (IG)
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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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OK
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3.
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CHECK ECU POWER SOURCE CIRCUIT
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(a) Check the ECU power source circuit.
Click here
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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