Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001H7MB |
Model Year Start: 2020 |
Model: GR Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Transmission Control ECU Communication Stop Mode; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] |
Transmission Control ECU Communication Stop Mode
|
DESCRIPTION
Detection Item
|
Symptom
|
Trouble Area
|
Transmission Control ECU Communication Stop Mode
|
Any of the following conditions are met:
|
-
Transmission control ECU branch line or connector
-
Power source circuit of transmission control ECU
-
Transmission control ECU ground circuit
-
Transmission control ECU
|
WIRING DIAGRAM
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
1.
|
CHECK FOR OPEN IN CAN BUS LINES (TRANSMISSION CONTROL ECU BRANCH LINE)
|
(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
|
Condition
|
Specified Condition
|
C80-15 (CANH) - C80-16 (CANL)
|
Cable disconnected from negative (-) battery terminal
|
54 to 69 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Transmission Control ECU)
|
|
|
NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (TRANSMISSION CONTROL ECU)
|
OK
|
|
|
2.
|
CHECK HARNESS AND CONNECTOR (POWER SOURCE CIRCUIT)
|
(a) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
C80-2 (E1) -Body ground
|
Cable disconnected from negative (-) battery terminal
|
Below 1 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Transmission Control ECU)
|
|
|
(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
|
Switch Condition
|
Specified Condition
|
C80-1 (+B) - Body ground
|
Always
|
11 to 14 V
|
C80-41 (IGSW) - Body ground
|
Engine switch on (IG)
|
11 to 14 V
|
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
|