Last Modified: 07-31-2024 |
6.11:8.1.0 |
Doc ID: RM100000001CBPD |
Model Year Start: 2019 |
Model: GR Corolla |
Prod Date Range: [06/2018 - 01/2019] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Transmission Control ECU Communication Stop Mode; 2019 MY Corolla Corolla Hatchback GR Corolla [06/2018 - 01/2019] |
Transmission 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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Transmission Control ECU Communication Stop Mode
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Any of the following conditions are met:
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Communication stop for "TCM" is indicated on the "Communication Bus Check" screen of the Techstream.
Click here
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Communication stop history for "TCM" is indicated on the "Communication Bus Check (Detail)" screen of the Techstream. (The Lost Communication Time value for "TCM" is 6 or more.)
Click here
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Communication system DTCs (DTCs that start with U) that correspond to "Transmission Control ECU Communication Stop Mode" in "DTC Combination Table" are output.
Click here
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Transmission control ECU branch line or connector
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Power source circuit of transmission control ECU
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Transmission control ECU ground circuit
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Transmission 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 (TRANSMISSION CONTROL ECU BRANCH LINE)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the C80 transmission 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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C80-15 (CANH) - C80-16 (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 Transmission Control ECU)
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|
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NG |
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REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TRANSMISSION 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) 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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C80-2 (E1) -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 Transmission Control ECU)
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|
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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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Switch Condition
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Specified Condition
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C80-1 (+B) - Body ground
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Always
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11 to 14 V
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C80-41 (IGSW) - Body ground
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Engine 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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