LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Suzuki >> 2007 >> Swift + >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls & Fuel - 1.6L - DTC P0016 To P0317 >> DTC P0201, P0202, P0203, or P0204 >> Circuit/System Testing
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Circuit/System Testing

  1. Ignition OFF, disconnect the harness connector of the appropriate fuel injector.
    2. IMPORTANT: The test lamp is used to load the circuit and may not illuminate.
  2. Connect a test lamp between the ignition 1 voltage circuit of the fuel injector and ground.
  3. Ignition ON, load test for battery voltage between the ignition 1 voltage circuit of the fuel injector and ground.
    • If less than B+, repair the ignition 1 voltage circuit of the fuel injector for a short to ground or an open/high resistance.
  4. With the ignition OFF, connect a J 34730-405  between the control circuit and the ignition 1 voltage circuit of the fuel injector.
  5. Engine running, the test lamp should flash.
    • If the test lamp remains ON all the time, test for a short to ground on the control circuit. If circuit/connections test normal, replace the ECM.
    • If the test lamp remains OFF all the time, test for a short to voltage or an open/high resistance on the control circuit. If circuit/connections test normal, replace the ECM.
  6. If all circuits/connections test normal, test or replace the fuel injector.
scientia non olet · About LEMON Manuals