Joyner JNSZ1600QL Owner's Manual page 134

Fig.185
——Engine idling speed actuator doesn't work ——Shorted fuel injector +12V circuit ——Opened or
shorted ignition coil circuit Also, monitor the following failure ： ——With engine cycling start or engine
working, signal wheel is not synchronous. ——Opened or shorted λ s ensor circuit ——Opened fuel
pump circuit If a sensor failure (except the speed sensor/ TDC sensor) is indicated, ECU will substitute
the preset value for the input data from the faulted sensor to keep engine operating. Also ECU will store
the failure in the memory permanently. At the same time, the sensor will be kept out of the system until
the sensor signal matches the signal from ECU again.
If the actuator or the corresponding signal channel fails, the above program is also applied.
When a failure is detected and the corresponding substitute value is applied, the warning light on the
instrument panel will turn on. Warning light will go out only when the component was replaced by the
dealer or the failure is non long-term. No matter whether the failure is long-term, the failure data will be
stored permanently in the memory. Communicate with CHECK—UP1 actively Connecting CHECK—UP1
diagnosis tool to the system may fulfill the following operations: ——Display the short-term or long-term
malfunctions or parameters ——Active diagnosis ： — —Fuel injector ——Fuel pump ——Ignition module
——Idling speed actuator
I.A.W system warning light ——Fuel vapor recirculation solenoid
Fig.187
Removal and reinstallation for fuel pump ： F uel pump is installed inside the fuel tank.
Removal procedure is as following:
Fig.186
133