Last Modified: 05-13-2024 |
6.11:8.1.0 |
Doc ID: RM100000001GMAK |
Model Year Start: 2020 |
Model: GR Corolla |
Prod Date Range: [01/2019 - 09/2022] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM (for Gasoline Model): ECM Communication Stop Mode; 2020 - 2022 MY Corolla Corolla Hatchback GR Corolla [01/2019 - 09/2022] |
ECM Communication Stop Mode
|
DESCRIPTION
Detection Item
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Symptom
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Trouble Area
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ECM Communication Stop Mode
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Any of the following conditions are met:
|
-
ECM main line or connector
-
Power source circuit of ECM
-
ECM ground circuit
-
ECM
|
WIRING DIAGRAM
for M20A-FKS
for 2ZR-FAE
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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for M20A-FKS
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A
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for 2ZR-FAE
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B
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A
|
|
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2.
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CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A47 ECM 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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A47-8 (CANH) - A47-18 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to ECM)
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM)
|
OK
|
|
|
3.
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CHECK ECM POWER SOURCE CIRCUIT
|
(a) Check the ECM power source circuit.
Click here
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
4.
|
CHECK FOR OPEN IN CAN BUS LINES (ECM MAIN LINE)
|
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the A46 ECM connector.
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection
|
Condition
|
Specified Condition
|
A46-13 (CANH) - A46-26 (CANL)
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Cable disconnected from negative (-) battery terminal
|
108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to ECM)
|
|
|
NG |
|
REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM)
|
OK
|
|
|
5.
|
CHECK ECM POWER SOURCE CIRCUIT
|
(a) Check the ECM power source circuit.
Click here
NG |
|
REPAIR OR REPLACE HARNESS OR CONNECTOR (POWER SOURCE CIRCUIT)
|
|