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HOMESERVICE MANUALSSUZUKI2008SWIFT +REPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS AND FUEL - 1.6L - DTC P0630 TO DTC P2282DTC P0685CIRCUIT/SYSTEM TESTING
2008 Suzuki Swift +

Circuit/System Testing

2008 Suzuki Swift +SECTION Circuit/System Testing
  1. Ignition OFF, disconnect the EC ignition relay.
  2. Ignition ON, verify a test lamp illuminates between the relay coil ignition circuit terminal 86 and ground.
    • If the test lamp does not illuminate, repair the relay coil ignition circuit for a short to ground or an open/high resistance.
  3. Ignition OFF, connect a test lamp between the relay coil control circuit terminal 85 and the relay coil ignition circuit terminal 86.
    • If the test lamp is always ON, test the relay coil control circuit for a short to ground. If the circuit tests normal, replace the ECM.
  4. Ignition ON, verify the test lamp turns ON.
    • If the test lamp is always OFF, test the relay coil control circuit for a short to voltage or an open/high resistance. If the circuit tests normal, replace the ECM.
    5. IMPORTANT: The ignition 1 voltage circuit is between the EC ignition relay and the ECM. The ignition 1 voltage is a feedback circuit.
  5. Connect a 15A fused jumper wire between the relay switch B + circuit terminal 30 and the relay switch ignition 1 voltage circuit terminal 87.
  6. Attempt to start the engine. The engine should start.
    • If the engine does not start, test the relay switch ignition 1 voltage circuit between the EC ignition relay and the ECM for a short to ground or for an open/high resistance. If the circuit tests normal, replace the ECM.
  7. If all circuits test normal, test or replace the EC ignition relay.
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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.