LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2006 >> Cobalt LTZ >> Repair and Diagnosis >> External Pages >> Different car >> Section 695 (Engine Controls And Fuel - 2.2L (L61) - DTC P0420 To DTC P2544) >> DTC P1682 >> Circuit/System Testing

Circuit/System Testing

WARNING: This page is about a different car, the 2007 Pontiac G5 Pursuit, 2007 Pontiac G5, and 2007 Chevrolet Cobalt. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ignition ON, observe the Ignition 1 Signal and EC Ignition Relay Feedback scan tool parameters to determine which is less than B+.
  2. Ignition OFF, remove the relay that corresponds to the scan tool parameter that is less than B+.
    3. IMPORTANT: 6 ohms or greater in the circuit/underhood fuseblock will cause the DTC to set.
  3. Ignition On, connect a 3A fused jumper wire between B+ and the applicable ignition 1 circuit terminal. Verify that the applicable scan tool parameter displays B+.
    • If the applicable scan tool parameter is less than the specified value, test the ignition 1 circuit for an open/high resistance. If the circuit tests normal, replace the ECM.
  4. If all circuits test normal, test or replace the applicable relay.
scientia non olet · About LEMON Manuals