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Home >> Pontiac >> 2008 >> Torrent GXP, AWD >> Repair and Diagnosis >> External Pages >> Different car >> Section 150 (Engine Controls And Fuel - 3.6L - DTC P0335 To P2105) >> DTC P0641-P0643, P0651-P0653, or P0697-P0699 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2009 Pontiac Torrent and 2009 Chevrolet Equinox. However, it is still accessible from the selected car via links, so may be relevant.
    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, test for 4.6-5.2 V between one of the 5-volt reference circuits and ground.
    • If the voltage is less than the specified range, test for an open between the ECM and the splice for the affected components. Or, test for a short to ground on the 5-volt reference circuit for each of the affected components. If all circuits test normal, replace the ECM.
    • 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.
    3. 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 scan tool 5-Volt Reference Circuit Status parameter. 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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