Last Modified: 04-05-2023 |
6.11:8.1.0 |
Doc ID: RM1000000018DN5 |
Model Year Start: 2018 |
Model: Sienna |
Prod Date Range: [11/2017 -
] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM: Open in Bus 2 Main Bus Line; 2018 - 2020 MY Sienna [11/2017 - ] |
Open in Bus 2 Main Bus Line
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DESCRIPTION
There may be an open circuit in one of the bus 2 main lines and/or a central gateway ECU (network gateway ECU) CAN branch wire when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher
Detection Item
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Trouble Area
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Resistance between terminals 18 (CA4H) and 17 (CA4L) of central gateway ECU (network gateway ECU) is 70 Ω or higher.
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-
Bus 2 CAN main wire or connector
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Bus 2 CAN branch wire or connector
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ECM
-
Combination meter assembly
-
Central gateway ECU (network gateway ECU)
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No. 5 junction connector
-
No. 6 junction connector
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This malfunction is not related to the lines of a bus 2 branch except the central gateway ECU (network gateway ECU) CAN branch wires or to ECUs or sensors connected a bus 2 branch.
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 FOR OPEN IN CAN BUS WIRE (COMBINATION METER ASSEMBLY - NO. 5 JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the combination meter assembly connector.
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*a
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Front view of wire harness connector
(to Combination Meter Assembly)
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|
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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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D145-17 (CANH) - D145-16 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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NG
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|
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(a) Reconnect the D145 combination meter assembly connector.
NEXT
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|
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3.
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CHECK FOR OPEN IN CAN BUS WIRE (ECM - NO. 6 JUNCTION CONNECTOR)
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(a) Disconnect the ECM connector.
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*a
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Front view of wire harness connector
(to ECM)
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|
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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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A69-13 (CANH) - A69-26 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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NG
|
|
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(a) Reconnect the A69 ECM connector.
NEXT
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|
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5.
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CHECK FOR OPEN IN CAN BUS WIRE (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 JUNCTION CONNECTOR)
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(a) Disconnect the central gateway ECU (network gateway ECU) connector.
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|
*a
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Front view of wire harness connector
(to Central Gateway ECU (Network Gateway 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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D202-18 (CA4H) - D202-17 (CA4L)
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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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|
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(a) Reconnect the D202 central gateway ECU (network gateway ECU) connector.
NEXT
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|
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7.
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CHECK FOR OPEN IN CAN BUS WIRE (NO. 5 JUNCTION CONNECTOR)
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(a) Disconnect the No. 5 junction connector.
*a
|
Front view of wire harness connector
(No. 5 Junction Connector)
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*b
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to No. 6 Junction Connector
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*c
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to Combination Meter Assembly
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*d
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to Central Gateway ECU (Network Gateway 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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Connect to
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D179-8 (CANH) - D179-19 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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No. 6 junction connector
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D179-7 (CANH) - D179-18 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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Combination meter assembly
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D179-5 (CANH) - D179-16 (CANL)
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Cable disconnected from negative (-) battery terminal
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54 to 69 Ω
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Central gateway ECU (network gateway ECU)
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Result
Result
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Proceed to
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OK
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A
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NG (Combination meter assembly CAN main wire)
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B
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NG (Central gateway ECU (network gateway ECU) CAN branch wire)
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C
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NG (No. 6 junction connector CAN main wire)
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D
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A |
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REPLACE NO. 5 CAN JUNCTION CONNECTOR
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B |
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REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - COMBINATION METER ASSEMBLY)
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C |
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REPAIR OR REPLACE CAN BRANCH WIRE OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU))
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D
|
|
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(a) Reconnect the D179 No. 5 junction connector.
NEXT
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|
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9.
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CHECK FOR OPEN IN CAN BUS WIRE (NO. 6 CAN JUNCTION CONNECTOR)
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(a) Disconnect the No. 6 junction connector.
*a
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Front view of wire harness connector
(to No. 6 Junction Connector)
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*b
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to No. 5 Junction Connector
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*c
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to ECM
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-
|
-
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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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Connect to
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D180-1 (CANH) - D180-12 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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No. 5 junction connector
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D180-7 (CANH) - D180-18 (CANL)
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Cable disconnected from negative (-) battery terminal
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108 to 132 Ω
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ECM
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Result
Result
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Proceed to
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OK
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A
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NG (ECM CAN main wire)
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B
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NG (No. 5 junction connector CAN main wire)
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C
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A |
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REPLACE NO. 6 JUNCTION CONNECTOR
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B |
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REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - ECM)
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C |
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REPAIR OR REPLACE CAN MAIN WIRE OR CONNECTOR (NO. 6 JUNCTION CONNECTOR - NO. 5 JUNCTION CONNECTOR)
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