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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> Engine Control System Self-Diagnostics - 3.8L >> Diagnostic Tests >> DTC P0327: Knock Sensor No. 1 Circuit; P0332: Knock Sensor No. 2 Circuit >> Diagnostic Procedures

Diagnostic Procedures

  1. If powertrain diagnostic system check was performed, go to next step. If powertrain diagnostic system check was not performed, go to POWERTRAIN DIAGNOSTIC SYSTEM CHECK  under DIAGNOSTIC SYSTEM CHECKS. After performing powertrain diagnostic system check, go to next step.
  2. Ensure engine mechanical problem is not causing knock. If engine knock is heard, repair engine mechanical condition as necessary. Turn ignition on, with engine off. Using scan tool, review FREEZE FRAME and/or FAILURE RECORDS data and note parameters. Turn ignition off for about 30 seconds. Start engine and operate vehicle within conditions required for this diagnostic to run, and as close to conditions recorded in FREEZE FRAME/FAILURE RECORDS as possible. Select DTC function then enter this DTC. If scan tool indicates that this test failed this ignition, go to next step. If scan tool does not indicate that this test failed this ignition, see DIAGNOSTIC AIDS .
  3. Turn ignition off. Disconnect suspect KS. KS are located on lower left and right of engine block. Using DVOM, measure voltage between suspect KS terminal and engine block. Turn ignition on. Voltage should be zero volts. If voltage is as specified, go to step  5. If voltage is not as specified, go to next step.
  4. For bank 1 KS, repair short to voltage in Dark Blue wire between KS connector and PCM connector C1 terminal No. 33. See Figure. For bank 2 KS, repair short to voltage in Light Blue wire between KS connector and PCM connector C1 terminal No. 34. After repairs, go to step  9.
  5. Locate PCM and disconnect connector C1. See Figure. Turn ignition on, with engine off. For bank 1 KS, check for open or short to ground in Dark Blue wire between KS connector and PCM connector C1 terminal No. 33. See Figure. For bank 2 KS, check for open or short to ground in Light Blue wire between KS connector and PCM connector C1 terminal No. 34. Repair as necessary. After repairs, go to step  9. If circuit is okay, go to next step.
  6. Check for poor connections at suspect KS connector. Repair as necessary. After repairs, go to step  9. If connections are okay, go to next step.
  7. Check for poor connections at KS terminals of PCM connector. Repair as necessary. After repairs, go to step  9. If terminal connections are okay, go to next step.
  8. Replace KS. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing sensor, go to next step.
  9. Using scan tool, clear DTCs. Turn ignition off for 30 seconds. Start engine and allow it to reach normal operating temperature. Operate vehicle within conditions for setting this DTC. If scan tool indicates that this test ran and passed, go to next step. If scan tool does not indicate that this test ran and passed, go to step  2.
  10. Using scan tool, select CAPTURE INFO, REVIEW INFO function. If any undiagnosed DTCs are displayed, go to applicable DTC test. See DIAGNOSTIC TROUBLE CODE DEFINITIONS . If no undiagnosed DTCs are displayed, system is okay.
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