DESCRIPTION
There may be an open circuit in one of the bus 2 main lines when the resistance between terminals 18 (CA4H) and 17 (CA4L) of the network gateway ECU is 70 Ω or higher.
Symptom | Trouble Area |
---|---|
Resistance between terminals 18 (CA4H) and 17 (CA4L) of network gateway ECU is 70 Ω or higher. |
|
This malfunction is not related to the lines of a bus 2 branch or to ECUs or sensors connected to a bus 2 branch.
WIRING DIAGRAM
CAUTION / NOTICE / HINT
NOTICE:
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HINT:
PROCEDURE
1. | CHECK FOR OPEN IN CAN BUS LINES (NETWORK GATEWAY ECU) |
(a) Disconnect the cable from the negative (-) battery terminal.
(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 |
---|---|---|
J75-18 (CA4H) - J75-17 (CA4L) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω |
OK | REPLACE NETWORK GATEWAY ECU |
|
2. | CHECK FOR OPEN IN CAN BUS LINES (ECM) |
(a) Reconnect the J75 network gateway ECU connector.
(b) Disconnect the A37 ECM connector. |
|
(c) Measure the resistance according to the value(s) in the table below.
Standard Resistance:
Tester Connection | Condition | Specified Condition |
---|---|---|
A37-13 (CANH) - A37-26 (CANL) | Cable disconnected from negative (-) battery terminal | 108 to 132 Ω |
OK | REPLACE ECM |
NG | REPAIR OR REPLACE CAN MAIN BUS LINES OR CONNECTOR (ECM - NETWORK GATEWAY ECU) |
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