Daihatsu F300 Service Manual page 1393

EFISYSTEM
• [g) Symptom .... Backfire (lean fuel mixture)
Check diagnosis system.
J
Perform trouble shooting according to diagnosis
Check output of malfunction code.
MOIIunc-L
system
(See page EF-29.)
tion code
Normal code
Check idle speed. I
BAD
Idle speed Reset.
(See page EM-23.)
Check ig1ition timing.
I I
1.
Ignition- Adjust.
(See page IG-29.)
I
BAD
I
2.
Distributor- Timing advance characteristics
OK
• Check ignition spark.
I
1.
Spark plug wire
(See page rG-28.)
I
BAD
2 . Distributor(tgnitor
\OK
3.
Ignition coil
Checking spark plugs
Spark plugs
(See
page rG-12.)
BAD
J
1.
lnjector(s)- shorted or leaking
AU
spark
1 2. Injector wiring(s) between ECU and injectors
OK
plug
are
weL
Check fuel pressure.
1.
Fuel
pump
(See page EF-77.)
BAD
2.
Fuel filter
OK
3. Fuel pressure regulator
(See page
EF--00.)
•
I
Check in:e<;tor fuel
flow
rate.
BAD
Injector -Injection condition/leakage
(See page EF 78.)
OK
Check EFI electronic circuit, using voiVOhm meter.
I
1. Power to ECU
(See page EF-35.) I
BAD
(1) Fusible link
(2) Fuses
(3) Main relay
2. Pressure sensor
3. Water temperature sensor
4. Intake an temperature sensor
5 . Throttle position sensor
•
EF-25