DESCRIPTION
There may be an open circuit in one of the bus 3 main lines when the resistance between terminals 6 (CA3H) and 21 (CA3L) of the network gateway ECU is 70 Ω or higher.
Symptom | Trouble Area |
---|---|
Resistance between terminals 6 (CA3H) and 21 (CA3L) of network gateway ECU is 70 Ω or higher. |
|
This malfunction is not related to the lines of a bus 3 branch or to ECUs or sensors connected to a bus 3 branch.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (NO. 6 CAN JUNCTION CONNECTOR) |
(a) Disconnect the cable from the negative (-) battery terminal.
(b) Disconnect the J98 No. 6 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 |
---|---|---|---|
J98-7 (CANH) - J98-18 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | Network gateway ECU |
J98-11 (CANH) - J98-22 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω | Network gateway ECU |
OK | ![]() | REPLACE NO. 6 CAN JUNCTION CONNECTOR |
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2. | CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU - NO. 6 CAN JUNCTION CONNECTOR) |
(a) Reconnect the J98 No. 6 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 |
---|---|---|
J75-6 (CA3H) - J75-19 (CAYH) | Cable disconnected from negative (-) battery terminal | Below 1 Ω |
J75-21 (CA3L) - J75-20 (CAYL) | 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. 6 CAN JUNCTION CONNECTOR) |
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