Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GMAB |
Model Year Start: 2020 |
Model: GR Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): Skid Control ECU Communication Stop Mode; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] |
Skid 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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Skid Control ECU Communication Stop Mode
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Any of the following conditions are met:
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-
Brake actuator assembly branch line or connector
-
Power source circuit of brake actuator assembly
-
Brake actuator assembly ground circuit
-
Brake actuator assembly
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WIRING DIAGRAM
w/ Electric Parking Brake System
w/o Electric Parking Brake System
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
(a) Check vehicle type.
Result
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Proceed to
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w/ Electric Parking Brake System
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A
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w/o Electric Parking Brake System
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B
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A
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|
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2.
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CHECK FOR OPEN IN CAN BUS LINES (BRAKE ACTUATOR ASSEMBLY BRANCH LINE)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A51 brake actuator 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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A51-5 (CANH) - A51-19 (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 Brake Actuator Assembly)
|
|
|
NG |
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REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (BRAKE ACTUATOR ASSEMBLY)
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OK
|
|
|
3.
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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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A51-46 (GND1) - 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 Brake Actuator Assembly)
|
|
|
(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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A51-36 (IG1) - Body ground
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Ignition switch ON
|
11 to 14 V
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A51-1 (+BM) - Body ground
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Always
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11 to 14 V
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A51-30 (+BS) - Body ground
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Always
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11 to 14 V
|
NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
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4.
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CHECK FOR OPEN IN CAN BUS LINES (BRAKE ACTUATOR ASSEMBLY BRANCH LINE)
|
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A100 brake actuator assembly connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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A100-26 (CANH) - A100-14 (CANL)
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Cable disconnected from negative (-) battery terminal
|
54 to 69 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Brake Actuator Assembly)
|
|
|
NG |
|
REPAIR OR REPLACE CAN BRANCH LINES OR CONNECTOR (BRAKE ACTUATOR ASSEMBLY)
|
OK
|
|
|
5.
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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
|
A100-38 (GND1) - Body ground
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Cable disconnected from negative (-) battery terminal
|
Below 1 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Brake Actuator Assembly)
|
|
|
(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
|
Condition
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Specified Condition
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A100-28 (IG1) - Body ground
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Ignition switch ON
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11 to 14 V
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A100-1 (+BM) - Body ground
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Always
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11 to 14 V
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A100-25 (+BS) - 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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|