Table 1-66 (Continued)
S/N Operation Test Results Actions
Yes Next step
5
Remove the ignition metal wire from the spark plug. Install
the wire to a normal spark plug. Place the bottom end of
the spark plug towards the gound, and then turn to the
engine. Check if the spark is normal.
No
Check ignition coil, giant
transistor, and their
circuits
No Next step
6 Remove the spark plug. Check the place for dirts.
Yes
Repair or replace spark
plug (standard type)
Yes Next step
7
Check the pressure of the compressor. Standard:
1275kPa/300rpm; minimum: 981kPa/300rpm; difference
among cylinders: 98kPa/300rpm.
No
Check piston, piston ring,
air intake valve, valve seat
and cylinder head gasket
Yes Next step
8
Install all the removed parts. Release the fuel pressure to
0. Install fuel pressure gauge. Check if the pressure is
normal.
No
Check as per fuel
pressure test method
Yes Next step
9
Check the ignition time (15°±5°BDTC). The target idle
speed is M/T:800±50rpm.
No Basic check
Yes Next step
10
Start the engine for warm-up. After the engine reaches
normal operation speed, measure the voltage between
the pin J1-62 (front oxygen sensor high signal) or J1-06
(front oxygen sensor low signal) of the ECU and the
ground. Under the rotation speed of 2000rpm, the
changes between 0V-0.3V and 0.6V-1.0V should be no
less than 5 times, at least one time higher than 0.6V, at
least one time lower than 0.3V, an no higher than 1V.
No
Renew front oxygen
sensor
Yes Replace ECU
11
Check the intake air sensor signal with a diagnostic
instrument. (2.0-6.0gm/sec, at idle speed,
7.0-20.0gm/sec, at 2500rpm)
No
Check the connector of
the air intake temperature
sensor circuit for rust or
looseness.
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