Engine Is Cold; Engine Is Warm - Hisun HS700UTV-4 Maintenance Handbook

2.Special fault：
Idle instability, CH and CO of off-gas out of limits
Reason：Oxygen sensor loosing cause slight leakage or pipe slight leakage and makes the
oxygen sensor collect too much oxygen ion signal. The wrong signal transmits to the ECU which
result the increasing of oil supply. Finally, it causes the oil too thick.
3.Special fault:
In the vehicle driving process, there is no idle speed or too low idle speed when restart it after
storage battery power off abnormally.
Countermeasure: Step on the throttle slightly when start the engine and maintain for a few
seconds. And then let go of the throttle, remove the key and switch off the vehicle. After waiting for
ten minutes, switch on with the key that could restart the engine.
4.Special fault:
The engine can't start normally after changing air filter or air throttle
Reason：The inner cleanness of old air filter and air throttle is poor after long running. The idle
speed step motor will revise the volume of air up automatically. If change to new air filter or air
throttle, idle speed step motor inside ECU need to match the volume of oil when in idle speed
automatically.
Countermeasure: When start the engine, run 2 to 3 minutes in idle speed. If it can't run normally
in idle, turn off the engine and restart it repeatedly 10 seconds later until it can run normally in idle.
Or switch on and off the key 5 times in a row which can reset all saved data in ECU.

Engine is cold

1. Shift the transmission into neutral.
2. Turn the fuel valve on or confirm if the fuel is in upper or below retile in the fuel tank.
3. Start the engine and run in neutral for 1 minute to enhance the temperature of engine. If it runs
normally in neutral, you can drive the UTV.

Engine is warm

1. Shift the transmission into neutral.
2. Confirm if the fuel is in upper or below retied in the tank.
3. Start the engine. If the engine can run in idle speed steady and the engine speed is lower than
1600RPM, the UTV can shift driving forward.
GENERAL INFORMATION
Race the engine with high power in low
temperature will cause damage to the engine.
4.
Shift operation must be after UTV has stopped and
NOTE
NOTE
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