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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P0327: Knock Sensor No. 1 Circuit; P0332: Knock Sensor No. 2 Circuit >> Diagnostic Procedures

Diagnostic Procedures

WARNING: This page is about a different variant/trim than selected.
  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 TESTS. 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 at least 30 seconds. Start engine and operate vehicle within conditions required for this diagnostic to run, and as close to conditions recorded in FREEZE FRAME and/or 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. KS is located behind intake manifold. See Figure. Disconnect KS in-line connector located at rear of intake manifold. See Figure. Using DVOM set to 400 k/ohm scale, measure resistance between suspect KS terminal and engine block. Resistance should be 93-107 k/ohms. If resistance is as specified, go to next step. If resistance is not as specified, go to step  6.
  4. Turn ignition off. Connect DVOM between suspect KS and ground. Set DVOM on 400 mV AC voltage scale. Tap on engine near KS while observing signal on DVOM. DO NOT tap on any plastic engine components or damage may occur. If any signal is present, go to next step. If signal is not present, go to step  7.
  5. Locate PCM and disconnect connector C1. See Figure. Turn ignition on, with engine off. For KS No. 1, check for open, short to voltage or short to ground in Dark Blue wire between KS in-line connector terminal "A" and PCM connector C1 terminal No. 51. See Figure. For KS No. 2, check for open, short to voltage or short to ground in Light Blue wire between KS in-line connector terminal "B" and PCM connector C1 terminal No. 11. Repair as necessary. After repairs, go to step  12. If circuit is okay, go to step  9.
  6. Remove intake manifold to access knock sensors. See appropriate article in ENGINES. Check KS signal circuit between KS in-line connector (located at rear of intake manifold) and suspect KS connector for open or short to ground. Repair as necessary. After repairs, go to step  12. If circuit is okay, go to next step.
  7. Check for poor connections at suspect KS connector. Repair as necessary. After repairs, go to step  12. If connections are okay, go to next step.
  8. Replace KS. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing sensor, go to step  12.
  9. Check for poor connections at KS in-line connector terminals. Repair as necessary. After repairs, go to step  12. If terminal connections are okay, go to next step.
  10. Check for poor connections at KS terminals of PCM connector. Repair as necessary. After repairs, go to step  12. If terminal connections are okay, go to next step.
  11. Replace PCM. See REMOVAL, OVERHAUL & INSTALLATION - CARS article. After replacing PCM, go to next step.
  12. Using scan tool, clear DTCs. Turn ignition off for at least 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.
  13. 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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