LEMON Manuals: Even more car manuals for everyone
Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 20 (Engine Controls And Fuel - 3.5L - DTC P0010 Through DTC P0340) >> DTC P0325-P0328, P0330, P0332, or P0333 >> Component Testing

Component Testing

WARNING: This page is about a different variant/trim than selected.
  1. Connect the DMM between the knock sensor signal circuit terminal A and the knock sensor signal circuit terminal B on the sensor side of the knock sensor harness connector.
  2. Set the DMM to the 400 mV AC hertz scale and wait for the DMM to stabilize at 0 Hz.
    3. NOTE: DO NOT tap on plastic engine components.
  3. Tap on the engine block with a non-metallic object near the knock sensor while observing the signal indicated on the DMM.
  4. The DMM should display a fluctuating frequency while tapping on the engine block.
scientia non olet · About LEMON Manuals