ELECTRICAL SYSTEM
14 -
21
Electronic control unit
(
ECU
)
Function introduction
ECU fi rst collects the running data of the engine system in
real time through the sensors of the engine management
system, and then drives the actuator to control the engine
operation according to the system calibration and the
stored calibration data. The ECU is generally installed
under the cover (see
【
A
】
in the fi gure below) and fi xed
on the frame by two M6 bolts
【
B
】
(see
【
B
】
in the fi gure
below), with the ECU socket facing downwards.
Electrical characteristics
Working voltage:
Rated voltage: 13.5V
Full functional operating voltage range: 9 V ~ 16 V
Function limited voltage range: 6V ~ 9V, 16V ~ 18V
Ensure the diagnostic function voltage range: 8V ~ 16V
Working current:
Working current :< 1.1 A@13.5v
Static current: <1 mA@13.5v
Electrical protection:
◆
Overvoltage protection: ECU can withstand 24V overvoltage for 60 seconds (ambient temperature
is 23
℃
±5
℃
). If the system returns to normal operating voltage within 60 seconds, ECU can still
ensure normal operation.
◆
System reverse voltage protection: If UBR (Pin8) is powered by the main relay, the ECU can
withstand a reverse voltage of 14.0 V for 60 seconds (ambient temperature is 23
℃
± 5
℃
, other
connections are correct), within 60 seconds If the system returns to normal working voltage, ECU
can still guarantee normal operation.
◆
Output level protection: The controller drive level has diagnostic protection functions, such as
short-circuit to ground, short-circuit to power supply and open circuit. But it needs to be pointed out
that the ECU ignition pin does not have a short circuit protection function.
Fault diagnosis
The No. 34 pin of the ECU is connected to the K line for fault diagnosis. The K line can be used to call
up the fault information record in the ECU, or manually input some instructions such as clearing the fault
information record, self-learning, etc. ECU failure inspection mainly checks whether the connectors are
well connected and whether the pins are bent or deformed.
B
A
Summary of Contents for SNARLER ATV 2021 Series
Page 1: ...SERVICE MANUAL ATV SERIES PRODUCTS 20210804 V01...
Page 39: ...ENGINE LUBRICATION SYSTEM ENGINE LUBRICATION SYSTEM 3 1 2 Exploded view...
Page 99: ...ENGINE COOLING SYSTEM ENGINE COOLING SYSTEM 3 4 2 Exploded view...
Page 120: ...ENGINE TOP END ENGINE TOP END 3 5 10 Spark Plug Valve Cover Throttle Body Camshaft...
Page 153: ...CVT SYSTEM CVT SYSTEM 3 6 2 L L G G G G R R Lh Lh R R R R Exploded view...
Page 155: ...CVT SYSTEM CVT SYSTEM 3 6 4 R R R R G G R R L L Lh Lh M M G G G G G G...
Page 185: ...4 13 FRONT AND REAR DIFFERENTIAL FRONT AND REAR DIFFERENTIAL...
Page 212: ...COOLING SYSTEM 6 6 Special tools and sealants Silicone Sealant...
Page 230: ...FRONT REAR SUSPENSION 9 2 Exploded view of Front suspension...
Page 232: ...FRONT REAR SUSPENSION 9 4 Exploded view of Rear suspension...
Page 249: ...WHEELS AND TIRES 10 5 Special Tools Jack...
Page 264: ...BRAKE SYSTEM 11 5 Inside Circlip Pliers Special tool...
Page 276: ...STEERING SYSTEM 12 2 Exploded View of Steering System 1 2 A A 3 4 5 5 5 6 3 B...
Page 323: ...ELECTRICAL SYSTEM 14 15 EFI system Schematic diagram of EFI system...
Page 383: ...ELECTRICAL SYSTEM 14 75 B10 B11 B12 B14 B15 B16...