Last Modified: 11-20-2023 |
6.11:8.1.0 |
Doc ID: RM1000000014U5H |
Model Year Start: 2018 |
Model: Camry HV |
Prod Date Range: [07/2017 -
] |
Title: NETWORKING: CAN COMMUNICATION SYSTEM: Open in Bus 5 Main Bus Line; 2018 - 2024 MY Camry HV [07/2017 - ] |
Open in Bus 5 Main Bus Line
|
DESCRIPTION
There may be an open circuit in one of the CAN main bus lines when the resistance between terminals 15 (CA5H) and 16 (CA5L) 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 15 (CA5H) and 16 (CA5L) of the central gateway ECU (network gateway ECU) is 70 Ω or higher.
|
-
CAN main bus lines or connector
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Central gateway ECU (network gateway ECU)
-
Combination meter assembly
-
No. 3 CAN junction connector
-
No. 1 junction connector
-
No. 2 junction connector
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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
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 MAIN BUS LINES (NO. 2 JUNCTION CONNECTOR)
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(a) Disconnect the cable from the negative (-) auxiliary battery terminal.
(b) Disconnect the R97 No. 2 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. 2 Junction Connector)
|
*b
|
to Central Gateway ECU (Network Gateway ECU)
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*c
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to No. 1 Junction Connector
|
-
|
-
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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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R97-1 (CANH) - R97-12 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
|
Central gateway ECU (network gateway ECU)
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R97-2 (CANH) - R97-13 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
|
No. 1 junction connector
|
Result
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Proceed to
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OK
|
A
|
NG (Line to central gateway ECU (network gateway ECU))
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B
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NG (Line to No. 1 junction connector)
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C
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A |
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REPLACE NO. 2 JUNCTION CONNECTOR
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B
|
|
|
2.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (CENTRAL GATEWAY ECU (NETWORK GATEWAY ECU) - NO. 2 JUNCTION CONNECTOR)
|
(a) Reconnect the R97 No. 2 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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K76-15 (CA5H) - K76-16 (CA5L)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 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. 2 JUNCTION CONNECTOR)
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3.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 1 JUNCTION CONNECTOR)
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(a) Reconnect the R97 No. 2 junction connector.
(b) Disconnect the R94 No. 1 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 Junction Connector)
|
*b
|
to No. 3 CAN Junction Connector
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*c
|
to No. 2 Junction Connector
|
-
|
-
|
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
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Connected to
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R94-3 (CANH) - R94-14 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
|
No. 3 CAN junction connector
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R94-4 (CANH) - R94-15 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
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No. 2 junction connector
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Result
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Proceed to
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OK
|
A
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NG (Line to No. 2 junction connector)
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B
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NG (Line to No. 3 CAN junction connector)
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C
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A |
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REPLACE NO. 1 JUNCTION CONNECTOR
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B |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 1 JUNCTION CONNECTOR - NO. 2 JUNCTION CONNECTOR)
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C
|
|
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4.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR)
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(a) Reconnect the R94 No. 1 junction connector.
(b) Disconnect the K126 No. 3 CAN junction connector.
(c) Measure the resistance according to the value(s) in the table below.
*a
|
Front view of wire harness connector
(to No. 3 CAN Junction Connector)
|
*b
|
to No. 1 Junction Connector
|
*c
|
to Combination Meter Assembly
|
-
|
-
|
Standard Resistance:
Tester Connection
|
Condition
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Specified Condition
|
Connected to
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K126-3 (CANH) - K126-14 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
|
No. 1 junction connector
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K126-5 (CANH) - K126-16 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
|
108 to 132 Ω
|
Combination meter assembly
|
Result
|
Proceed to
|
OK
|
A
|
NG (Line to No. 1 junction connector)
|
B
|
NG (Line to combination meter assembly)
|
C
|
A |
|
REPLACE NO. 3 CAN JUNCTION CONNECTOR
|
B |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 1 JUNCTION CONNECTOR)
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C
|
|
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5.
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CHECK FOR OPEN IN CAN MAIN BUS LINES (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR)
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(a) Reconnect the K126 No. 3 CAN junction connector.
(b) Disconnect the K21 combination meter 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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K21-32 (CANH) - K21-31 (CANL)
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Cable disconnected from negative (-) auxiliary battery terminal
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108 to 132 Ω
|
|
|
*a
|
Front view of wire harness connector
(to Combination Meter Assembly)
|
|
|
NG |
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REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (COMBINATION METER ASSEMBLY - NO. 3 CAN JUNCTION CONNECTOR)
|
|