Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000018DL3 |
Model Year Start: 2018 |
Model: Sienna |
Prod Date Range: [11/2017 -
] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM: Skid Control ECU Communication Stop Mode; 2018 - 2020 MY Sienna [11/2017 - ] |
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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Either Condition is met:
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-
Power source circuit of brake actuator assembly (skid control ECU)
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Brake actuator assembly (skid control ECU) ground circuit
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Brake actuator assembly (skid control ECU) branch wire or connector
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Brake actuator assembly (skid 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:
-
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.
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CHECK CAN BUS LINE FOR DISCONNECTION (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) BRANCH WIRE)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect brake actuator assembly (skid control ECU) connector.
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|
*a
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Front view of wire harness connector
(to Brake Actuator Assembly (Skid Control ECU))
|
|
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(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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A75-22 (CANH) - A75-10 (CANL)
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Cable disconnected from negative (-) battery terminal
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54 to 69 Ω
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NG |
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REPAIR OR REPLACE CAN BRANCH WIRE CONNECTED TO BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) (CAN-H, CAN-L)
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OK
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|
|
2.
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CHECK HARNESS AND CONNECTOR (BRAKE ACTUATOR ASSEMBLY (SKID CONTROL ECU) - POWER SOURCE)
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(a) Disconnect the brake actuator assembly (skid control ECU) connector.
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|
*a
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Front view of wire harness connector
(to Brake Actuator Assembly (Skid Control ECU))
|
|
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(b) 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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A75-25 (GND1) - Body ground
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Cable disconnected from negative (-) battery terminal
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Below 1 Ω
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A75-1 (GND2) - Body ground
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Cable disconnected from negative (-) battery terminal
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Below 1 Ω
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(c) Reconnect the cable to the negative (-) battery terminal.
NOTICE:
When disconnecting the cable, some systems need to be initialized after the cable is reconnected (See page
)
(d) 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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A75-38 (+BS) - Body ground
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Always
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11 to 14 V
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A75-13 (BM) - Body ground
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Always
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11 to 14 V
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A75-12 (IG1) - Body ground
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Ignition switch ON
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11 to 14 V
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NG |
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REPAIR OR REPLACE HARNESS OR CONNECTOR
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|