Last Modified: 11-20-2023 |
6.11:8.1.0 |
Doc ID: RM100000001E7CR |
Model Year Start: 2019 |
Model: Camry HV |
Prod Date Range: [09/2018 -
] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM: Open in Bus 1 Main Bus Line; 2019 - 2024 MY Camry HV [09/2018 - ] |
Open in Bus 1 Main Bus Line
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DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
Symptom
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Trouble Area
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Resistance between terminals 23 (CA1H) and 8 (CA1L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
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This malfunction is not related to the lines of a CAN branch or to ECUs or sensors connected to a CAN branch.
WIRING DIAGRAM
w/ Parking Assist Monitor System or Panoramic View Monitor System
w/ Rear View Monitor 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/ Parking Assist Monitor System or Panoramic View Monitor System
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A
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w/ Rear View Monitor 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 MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the A66 No. 1 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a
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Front view of wire harness connector
(to No. 1 CAN Junction Connector)
|
*b
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to Central Gateway ECU (Network Gateway ECU)
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*c
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to No. 5 CAN Junction Connector
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-
|
-
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Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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Connected to
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A66-3 (CANH) - A66-9 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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Central gateway ECU (network gateway ECU)
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A66-5 (CANH) - A66-11 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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No. 5 CAN junction connector
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Result
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Proceed to
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OK
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A
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NG (Line to central gateway ECU (network gateway ECU))
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B
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NG (Line to No. 5 CAN junction connector)
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C
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A |
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REPLACE NO. 1 CAN JUNCTION CONNECTOR
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B
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|
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3.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
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(a) Reconnect the A66 No. 1 CAN junction connector.
(b) Disconnect the K76 central gateway ECU (network gateway ECU) 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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K76-23 (CA1H) - K76-9 (CAXH)
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Cable disconnected from negative (-) auxiliary battery terminal
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Below 1 Ω
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K76-8 (CA1L) - K76-24 (CAXL)
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Cable disconnected from negative (-) auxiliary 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 Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
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4.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 5 CAN JUNCTION CONNECTOR)
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(a) Reconnect the A66 No. 1 CAN junction connector.
(b) Disconnect the R98 No. 5 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a
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Front view of wire harness connector
(to No. 5 CAN Junction Connector)
|
*b
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to Central Gateway ECU (Network Gateway ECU)
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*c
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to No. 1 CAN Junction Connector
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-
|
-
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Standard Resistance:
Tester Connection
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Condition
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Specified Condition
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Connected to
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R98-1 (CANH) - R98-11 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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Central gateway ECU (network gateway ECU)
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R98-5 (CANH) - R98-15 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
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No. 1 CAN junction connector
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Result
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Proceed to
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OK
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A
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NG (Line to No. 1 CAN junction connector)
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B
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NG (Line to central gateway ECU (network gateway ECU))
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C
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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 BUS LINES OR CONNECTOR (NO. 5 CAN JUNCTION CONNECTOR - NO. 1 CAN JUNCTION CONNECTOR)
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C
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|
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5.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the R98 No. 5 CAN junction connector.
(b) Disconnect the K76 central gateway ECU (network gateway ECU) 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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K76-23 (CA1H) - K76-9 (CAXH)
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Cable disconnected from negative (-) auxiliary battery terminal
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Below 1 Ω
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K76-8 (CA1L) - K76-24 (CAXL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
|
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*a
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Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 5 CAN JUNCTION CONNECTOR)
|
6.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 CAN JUNCTION CONNECTOR)
|
(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the A66 No. 1 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a
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Front view of wire harness connector
(to No. 1 CAN Junction Connector)
|
*b
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to Central Gateway ECU (Network Gateway ECU)
|
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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Connected to
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A66-3 (CANH) - A66-9 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
|
Central gateway ECU (network gateway ECU)
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A66-5 (CANH) - A66-11 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
|
Central gateway ECU (network gateway ECU)
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OK |
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REPLACE NO. 1 CAN JUNCTION CONNECTOR
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NG
|
|
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7.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
|
(a) Reconnect the A66 No. 1 CAN junction connector.
(b) Disconnect the K76 central gateway ECU (network gateway ECU) 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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K76-23 (CA1H) - K76-9 (CAXH)
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Cable disconnected from negative (-) auxiliary battery terminal
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Below 1 Ω
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K76-8 (CA1L) - K76-24 (CAXL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
Below 1 Ω
|
|
|
*a
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Front view of wire harness connector
(to Central Gateway ECU (Network Gateway ECU))
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 1 CAN JUNCTION CONNECTOR)
|
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