Maintenance manual for sunray hfc4da1-2c china-IV diesel engines
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16.
DTC P0562 Too low battery voltage
P0563 Too high battery voltage
P1617 The engine cannot be shut down with too high internal supply voltage.
P1618 The engine cannot be shut down with too low internal supply voltage.
P1637 Too high voltage in ECU internal power supply module
P1638 Too low voltage in ECU internal power supply module
Fault Description: The ECU monitors the system voltage via the ignition voltage circuit. When the voltage exceeds
the set range, the parts may be damaged and the input reading may be incorrect. When the system voltage detected by
ECU is too low (below 11V) or too high (above 16V), relevant DTCs shall be generated.
Diagnosis Hint: Check if the diagnostic system is normal.
Check if the charging system is normal.
Perform relevant test for intermittent failure or poor contact.
Terminal ECU
K01 Positive battery terminal +Ra
K03 Positive battery terminal +Rb
K05 Positive battery terminal +Rc
K47 Main relay control
K46 Ignition switch power supply
Power supply of main relay
Main relay
Power supply of ignition switch
Control of main rela
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