Motive Power Industry BLUR 150, Service Manual

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(1) Engine not running or slowly running during start-up
General trouble location: 1. Battery; 2. Start motor; 3. Main wiring or power switch; 4. Engine
mechanism.
Procedure for general diagnoses:
No. Operating Procedure
Detection
Results
Subsequent Steps
Yes Next step
1
Check the voltage between two battery terminals with a
multi-meter to ensure the voltage between 11 and 12V
during start-up of the engine.
No Replace the battery.
Yes Next step
2
Keep the power switch “ON” and check the voltage at the
positive terminal on the start motor over 8V.
No
Fix or replace wiring
harness.
Yes
Fix or replace the start
motor.
3
Remove the start motor and check its status for open
circuits or jam attributed to lubrication insufficient.
No Next step
Yes
Change applicable
lubricant.
4
For any trouble in winter only, check lubricant in the engine
wrong for big resistance of the start motor.
No Next step
Yes
Correct resistance inside
the engine.
5
Check mechanical resistance inside the engine causing the
motor not running or slowly running.
No Repeat the said step.
(2) Engine running but start-up failing during start-up
General trouble location: 1. Oil tank empty; 2. Fuel pump; 3. RPM sensor; 4. Ignition coils; 5. Engine
mechanism.
Procedure for general diagnoses:
No. Operating Procedure
Detection
Results
Subsequent Steps
Yes Next step
1
Connect a fuel pressure gauge before the fuel inlet of the
nozzle; press the power switch repeatedly if necessary or start
the engine to check the fuel pressure at 300kPa or so.
No
Repair the fuel supply
system.
Yes Next step
2
Connect the EMS diagnosis tester and check “Engine RPM”;
start the engine to check any
RPM signal output.
No
Correct circuits of the
RMP sensor.
Yes Next step
3
Disconnect the ignition cable and connect a spark tester; start
the engine and check any high-voltage flash (blue/white).
No
Repair the ignition
system.
Yes
Eliminate any
mechanical trouble of
the engine.
4
Check pressure of the engine cylinder and find any possibility
of pressure insufficient.
No Next step
Yes Diagnosis assist
5
Connect an EMS adapter and press the power switch to check
voltages at Pins
5#, 10#, and 23#
; check grounding at Pins
2#
and
21#.
No
Repair the relevant
circuits.
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