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Home >> Suzuki >> 2008 >> XL7 Base, AWD >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine General Information And Diagnosis >> Diagnostic Information and Procedures >> DTC P0641, P0642, P0643, P0651, P0652, P0653, P0697, P0698 or P0699 >> Circuit/System Testing
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Circuit/System Testing

NOTE: Additional DTCs will set when disconnecting the components.
  1. Ignition OFF, disconnect the harness connector of all appropriate sensors for the applicable DTC. Refer to DIAGNOSTIC AIDS .
  2. Ignition ON, measure for 4.6-5.2 volts between one of the 5-volt reference circuits and ground.
    • If the voltage is less than the specified range, test for a short to ground on all the 5-volt reference circuits. If all circuits test normal, replace the control module.
    • If the voltage is greater than the specified range, test for a short to voltage on all the 5-volt reference circuits for each component associated with the appropriate 5-volt reference circuit. If all circuits test normal, replace the control module.
      NOTE: A short to voltage on the signal circuit of certain components may cause this DTC to set.
  3. Connect each component associated with the affected 5-volt reference circuit one at a time, while monitoring the appropriate 5-Volt Reference Circuit Status parameter with a scan tool. The parameter should continue to display OK.
    • If the parameter displays Fault when a component is connected, test the signal circuit of that component for a short to voltage. If the circuit tests normal, replace the component.
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