Hyundai Yanmar TNV Series Manual page 33

CONTROL SYSTEM
About battery reverse connection
• Battery reverse connection will cause damage to the E-ECU and the rack position sensor.
• To protect the E-ECU and the rack position sensor against inadvertent reverse connection, main and sub
relays fitted with a reverse connection prevention diode (198461-52950) should be arranged as indicated
on the standard connection diagrams (E3-29927-0030/0040).
Check for initialization of the E-ECU
The E-ECU is factory set so that the internal EEPROM is reset at the first power-up of the E-ECU. At the first
power-up, check for correct initialization of the E-ECU (EEPROM) as follows:
At the first power-up: When the failure lamp illuminates, initialization is complete. The engine cannot be
At the second and later power-up: When the failure lamp illuminates for two seconds and then goes out,
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started in succession to the initialization process. To enable starting the engine, turn
off the power to the E-ECU; then turn on the power again.
If the failure lamp remains off, the harness or the E-ECU is probably out of order. See
"Troubleshooting chart" for details.
the E-ECU works normally. If the failure lamp remains off or flashes, the
harness or the E-ECU is probably out of order. See "Troubleshooting
chart" for details.
TNV Application Manual