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Home >> Suzuki >> 2004 >> Swift + >> Repair and Diagnosis >> External Pages >> Different car >> Section 104 (Engine Controls And Fuel - 1.6L - DTC P0630 To DTC P2282) >> DTC P0685 >> Circuit/System Testing
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Circuit/System Testing

WARNING: This page is about a different car, the 2008 Suzuki Swift +, 2008 Pontiac Wave, and 2008 Chevrolet Aveo. However, it is still accessible from the selected car via links, so may be relevant.
  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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