LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2010 >> Kizashi SLS, 4WD >> Repair and Diagnosis >> Engine Performance >> Fuel Delivery >> Fuel System >> Diagnostic Information and Procedures >> Fuel Injector Circuit Check >> Troubleshooting
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Fuel Injector Circuit Check: Troubleshooting

DIAGNOSTIC PROCEDURE CHART

Step Action YES NO
1  Fuel injector check for operating sound 
  1. Using sound scope, check each injector for operating sound with engine cranking.

Do all injectors make operating sound? 		 Fuel injector circuit is in good condition. Go to Step 2.
2  Fuel injector resistance check 
  1. Confirm that ignition mode of keyless push start system is "OFF".
  2. Disconnect connectors from fuel injectors.
  3. Check for proper connection to fuel injector at each terminals.
  4. If OK, check all fuel injectors for resistance, see Fuel Injector On-Vehicle Inspection .

Are all injectors at specified resistance? 		 Go to Step 3. Replace fuel injector, see Fuel Injector Removal and Installation .
3  Fuel injector insulation resistance check 
  1. Check that resistance between each fuel injector terminal and engine ground is infinity.

Are they in good condition? 		 Go to Step 4. Replace fuel injector, see Fuel Injector Removal and Installation .
4  Fuel injector power supply circuit check 
  1. Push engine switch to change ignition mode to "ON".
  2. Check that voltage between each fuel injector power supply circuit (B1, B2, B3, B4) and engine ground is battery voltage, see Fuel Injector Control System Circuit Diagram .

Is it in good condition? 		 Go to Step 5. Repair fuel injector power supply circuit. If it is in good condition, go to ECM POWER AND GROUND CIRCUIT CHECK .
5  Fuel injector drive circuit check 
  1. Confirm that ignition mode of keyless push start system is "OFF".
  2. Disconnect connectors from ECM.
  3. Check the following points, see Fuel Injector Control System Circuit Diagram .

  • Resistance of each fuel injector drive circuit (A1, A2, A3, A4): less than 3 Ω
  • Resistance between each fuel injector drive circuit and ground: infinity
  • Voltage of each fuel injector drive circuit: 0 - 1 V (with the ignition mode of keyless push start system in "ON")

Are they in good condition? 		 Go to Step 6. Repair fuel injector drive circuit.
6  Fuel injector check 
  1. Check fuel injector, see Fuel Injector Removal and Installation .

Is it in good condition? 		 Replace ECM and recheck DTC, see ECM REMOVAL AND INSTALLATION . Replace fuel injector, see Fuel Injector Removal and Installation .
scientia non olet · About LEMON Manuals