Mobile Generator ECM/Sensor Troubleshooting
wc_tx000723gb.fm 55
5.9 Checking the ECM CAN BUS Circuit
Prerequisites
Generator shut down
ECM turned off
Procedure
Follow the procedure below to check the ECM CAN BUS circuit.
1. Open the control panel.
2. Disconnect the CAN BUS connector.
3. Measure the resistance across terminals A and B of the connector.
Is approximately 120 ohms measured?
4. Reconnect the CAN BUS connector.
5. Close the control panel.
The ECM CAN BUS circuit has now been checked.
Yes ____ No ____
The CAN BUS circuit is OK.
The CAN BUS circuit has failed.
Replace the ECM.
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