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Engine Basic Inspection

This check is very important for troubleshooting when ECM has detected no DTC and no abnormality has been found in visual inspection.

Follow the flow carefully.

DIAGNOSIS PROCEDURE

Step Action YES NO
1  Was "Engine and Emission Control System Check" performed?  Go to Step 2. Go to ENGINE AND EMISSION CONTROL SYSTEM CHECK .
2  Check battery voltage 
Is it 11 V or more? 		 Go to Step 3. Charge or replace battery.
3  Is engine cranked?  Go to Step 4. Go to CRANKING SYSTEM SYMPTOM DIAGNOSIS .
4  Does engine start?  Go to Step 5. Go to Step 7.
5  Check idle speed 
  1. Warm up engine to normal operating temp.
  2. Shift transmission to neutral position for M/T ("P" position for A/T).
  3. All of electrical loads are switched off.
  4. Check engine idle speed with scan tool.
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Is it 700 - 800 r/min? 		 Go to Step 6. Go to ENGINE SYMPTOM DIAGNOSIS .
6  Check ignition timing 
  1. Using SUZUKI scan tool, select "MISC" mode on SUZUKI scan tool and fix ignition timing to initial one.
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  1. 2 Remove timing hole cap on transmission case to observe ignition timing.
  2. 3 Using timing light, check initial ignition timing referring to IGNITION TIMING INSPECTION AND ADJUSTMENT .

Is it 5° +/- 1° BTDC at specified idle speed? 		 Go to ENGINE SYMPTOM DIAGNOSIS . Adjust ignition timing referring to IGNITION TIMING INSPECTION AND ADJUSTMENT .
7  Check fuel supply 
  1. Check to make sure that enough fuel is filled in fuel tank.
  2. Remove engine cover from cylinder head cover referring to ENGINE COVER REMOVAL AND INSTALLATION .
  3. Turn ON ignition switch for 3 seconds and then OFF. Repeat this a few times.
  4. Check fuel return pressure (returning sounds) on fuel return hose (1).
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Is fuel return pressure (returning sounds) felt from fuel return hose when ignition switch is turned ON? 		 Go to Step 9. Go to Step 8.
8  Check fuel pump for operating 
Was fuel pump operating sound heard from fuel filler for about 2 seconds after ignition switch ON and stop? 		 Go to FUEL PRESSURE CHECK . Go to FUEL PUMP CIRCUIT CHECK .
9  Check ignition spark 
  1. Disconnect injector coupler.
  2. Remove spark plugs and connect them to ignition coils.
  3. Ground spark plugs.
  4. Crank engine and check if each spark plug sparks.

Is it in good condition? 		 Go to Step 10. Go to IGNITION SYSTEM SYMPTOM DIAGNOSIS .
10  Check fuel injector for operation 
  1. Install spark plugs and connect injector connector.
  2. Using sound scope (5), check operating sound of each injector when cranking engine.
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Was injector operating sound heard from all injectors? 		 Go to ENGINE SYMPTOM DIAGNOSIS . Go to FUEL INJECTOR CIRCUIT CHECK .
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