Efi Component Malfunction Check& Replacement Procedure (Pi Engine) - Sym ATTILA RS-21 EFi 150 Service Manual

4. FUEL INJECTION SYSTEM
EFi Component Malfunction Check& Replacement Procedure (PI Engine)
PI (Port Injection) ¡ ÷
Parts No. Service
Item
Parts Name schedule
1 390-002 At least
Ignition coil 20000km
life-expecta
ncy
Check it
every
3000km
2 379-010 At least
By-pass 20000km
valve life-expecta
ncy
Check it
every
3000km
3 358-016 At least
fuel pump & 20000km
regulator life-expecta
ncy
Check it
every
6000km
4 366-005 At least
Engine 20000km
temperature life-expecta
sensor ncy
Check it
every
3000km
4-36
This chapter Contents
Intake manifold injection engine
Inspection Method
1. With the Data Scan to check if the
ignition coil is malfunction.
2. Erase the DTC codes and replace
with new one & confirm again. If the
DTC codes disappear, then the
ignition coil is abnormal. Replace it
with new one.
3. If the DTC codes still exist, replace
the ECU for confirm. If the DTC
codes disappear, then the ECU is
abnormal. Replace it with new one.
4. Before the ignition coil is verified in
abnormal, check the coil resistance
and connector wire for short-circuit.
1. Check if the by-pass valve DTC
code shown with the Data Scan.
2. Erase the DTC codes and replace
with new one & confirm again. If the
DTC codes disappear, then the
by-pass valve is abnormal.
Replace it with new one.
3. If the DTC codes still exist, check if
the wire connector and by-pass
valve resistance are in normal.
4. If the DTC codes still exist, replace
the ECU for confirm. If the DTC
codes disappear, then the ECU is
abnormal. Replace it with new
one.
1. Connect a pressure gauge between
the regulator and fuel injector.
2. Make sure fuel pressure is within
2.5bar. The pressure is reached
within 3 seconds after turn on
ignition switch.
3. If the fuel pressure is out of
specification, check if the fuel pipe is
leaking. Is the fuel pump voltage
over 12V?
4. Replace the regulator and confirm
again.
1. Has the DTC code shown with the
Data Scan.
2. Engine temperature has to be
reached to room temperature after
engine stopped for a while.
3. Erase the DTC codes and replace
with new one & confirm again. If the
DTC codes disappear, then the
sensor is abnormal. Replace it
with new one.
4. If the DTC codes still exist, check if
wire connector and sensor's
resistance are normal.
Adjustment & replacement procedure
1. If the ignition coil has to be
changed, erase the DTC codes with
the Data Scan.
2. Turn off ignition switch, and replace
the coil with new one.
3. Turn on ignition switch and make
sure the DTC codes disappear.
1. If the by-pass valve has to be
changed, erase the DTC codes with
the Data Scan.
2. Turn off the ignition switch, and
then replace the valve with new
one.
3. Turn on ignition switch and make
sure the DTC codes disappear.
4. Check idle speed CO and adjust it if
necessary.
1. The oil seal has to be replaced if it
has to replace the regulator.
2. Oil seal has to be installed onto the
outer cover, and then assemble it
1. If the sensor has to be changed,
erase the DTC codes with the Data
Scan
2. Turn off ignition switch, and
remove connector.
3. Remove the sensor with tools.
4. New component tighten torque is
0.74~0.88kg-m.
5. Connect the connector, and the
Data Scan. Then, turn on ignition
switch.
6. Make sure if the DTC codes are
disappeared.
7. The value of stopped engine
temperature should near to room
temperature.