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Home >> Suzuki >> 2006 >> Swift + >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - 1.6L (L91) - DTC P0420 To DTC P2076 >> DTC P1391, P1392, or P1393 >> Circuit/System Verification
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Circuit/System Verification

  1. Ignition ON, observe the DTC information with a scan tool. Verify DTCs P0641 or P0651 are not set. If either DTC is set, refer to DTC P0641 or P0651.
  2. Start the engine, observe the rough road sensor voltage parameter. The reading should be between 1.1-3.7 volts.
  3. If the vehicle passes the Circuit/System Verification Test, then operate the vehicle within the conditions for running the DTC. You may also operate the vehicle within the conditions that are captured in the Freeze Frame/Failure Records List.
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