DESCRIPTION
There may be an open circuit in one of the bus 1 main lines when the resistance between terminals 23 (CA1H) and 8 (CA1L) of the network gateway ECU is 70 Ω or higher.
Symptom | Trouble Area |
---|---|
Resistance between terminals 23 (CA1H) and 8 (CA1L) of network gateway ECU is 70 Ω or higher. |
|
This malfunction is not related to the lines of a bus 1 branch or to ECUs or sensors connected to a bus 1 branch.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
CAUTION:
When performing the confirmation driving pattern, obey all speed limits and traffic laws.
NOTICE:
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DTC check procedure: Turn the engine switch on (IG) and wait for 1 minute or more. Then operate the suspected malfunctioning system and drive the vehicle at 60 km/h (37 mph) or more for 5 minutes or more.
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HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (NO. 10 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the S56 and S57 No. 10 CAN junction connectors.
HINT:
(c) Measure the resistance according to the value(s) in the table below.
*a | Rear view of wire harness connector (to No. 10 CAN Junction Connector) | *b | to Network Gateway ECU |
*c | to No. 3 CAN Junction Connector | - | - |
Code | Color (CANH Side) | Color (CANL Side) | Connected to |
---|---|---|---|
S56 | G | W | Network gateway ECU |
S57 | LG | W | No. 3 CAN junction connector |
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
S56-1 (CANH) - S56-2 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | Network gateway ECU |
S57-1 (CANH) - S57-2 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | No. 3 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (No. 3 CAN junction connector main lines) | B |
NG (Network gateway ECU main lines) | C |
A | REPLACE NO. 10 CAN JUNCTION CONNECTOR |
C | GO TO STEP 4 |
|
2. | CHECK FOR OPEN IN CAN BUS LINES (NO. 3 CAN JUNCTION CONNECTOR) |
(a) Reconnect the S56 and S57 No. 10 CAN junction connectors.
(b) Disconnect the J95 No. 3 CAN junction connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition | Connected to |
---|---|---|---|
J95-1 (CANH) - J95-11 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | Network gateway ECU |
J95-10 (CANH) - J95-20 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | No. 10 CAN junction connector |
Result | Proceed to |
---|---|
OK | A |
NG (No. 10 CAN junction connector main lines) | B |
NG (Network gateway ECU main lines) | C |
A | REPLACE NO. 3 CAN JUNCTION CONNECTOR |
B | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NO. 3 CAN JUNCTION CONNECTOR - NO. 10 CAN JUNCTION CONNECTOR) |
|
3. | CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR) |
(a) Reconnect the J95 No. 3 CAN junction connector.
(b) Disconnect the J75 network gateway ECU connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J75-9 (CAXH) - J75-23 (CA1H) | Cable disconnected from negative (-) battery terminal | Below 1 Ω |
J75-8 (CA1L) - J75-24 (CAXL) | Cable disconnected from negative (-) battery terminal | Below 1 Ω |
OK | REPLACE NETWORK GATEWAY ECU |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 3 CAN JUNCTION CONNECTOR) |
4. | CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU - NO. 10 CAN JUNCTION CONNECTOR) |
(a) Reconnect the S56 and S57 No. 10 CAN junction connectors.
(b) Disconnect the J75 network gateway ECU connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
J75-9 (CAXH) - J75-23 (CA1H) | Cable disconnected from negative (-) battery terminal | Below 1 Ω |
J75-8 (CA1L) - J75-24 (CAXL) | Cable disconnected from negative (-) battery terminal | Below 1 Ω |
OK | REPLACE NETWORK GATEWAY ECU |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (NETWORK GATEWAY ECU - NO. 10 CAN JUNCTION CONNECTOR) |
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