Engine Not Running Or Slowly Running During Start-Up; Engine Running But Start-Up Failing During Start-Up - PGO Tigra AF-125BAE Service Manual

(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.
Check the voltage between two battery terminals with a
1 multi-meter to ensure the voltage between 11 and 12V
during start-up of the engine.
Keep the power switch "ON" and check the voltage at the
2
positive terminal on the start motor over 8V.
Remove the start motor and check its status for open
3
circuits or jam attributed to lubrication insufficient.
For any trouble in winter only, check lubricant in the engine
4
wrong for big resistance of the start motor.
Check mechanical resistance inside the engine causing the
5
motor not running or slowly running.

(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.
Connect a fuel pressure gauge before the fuel inlet of the
1 nozzle; press the power switch repeatedly if necessary or start
the engine to check the fuel pressure at 300kPa or so.
Connect the EMS diagnosis tester and check "Engine RPM";
2
start the engine to check any RPM signal output.
Disconnect the ignition cable and connect a spark tester; start
3
the engine and check any high-voltage flash (blue/white).
Check pressure of the engine cylinder and find any possibility
4
of pressure insufficient.
Connect an EMS adapter and press the power switch to check
5 voltages at Pins 5#, 10#, and 23#; check grounding at Pins 2#
and 21#.
Information Summary and Preparation 1
Operating Procedure
Operating Procedure
Detection
Results
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Detection
Results
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Subsequent Steps
Next step
Replace the battery.
Next step
Fix or replace wiring
harness.
Fix or replace the start
motor.
Next step
Change applicable
lubricant.
Next step
Correct resistance inside
the engine.
Repeat the said step.
Subsequent Steps
Next step
Repair the fuel supply
system.
Next step
Correct circuits of the
RMP sensor.
Next step
Repair the ignition
system.
Eliminate any
mechanical trouble of
the engine.
Next step
Diagnosis assist
Repair the relevant
circuits.