P0332

CIRCUIT DESCRIPTION
The knock sensors (KS) produce an IAC signal under all engine operating conditions. The powertrain control module (PCM) calculates the average voltage range of each KS signal. If the KS system is operating normally, the PCM should monitor the KS voltage varying above and below calculated average voltage. If the PCM detects a KS 1 signal or a KS 2 signal voltage within the calculated average range, a DTC will be set. DTC P0327 refers to the front KS. DTC P0332 refers to the rear KS.

CONDITIONS FOR RUNNING THE DTC
^ DTCs P0117, P0118, P0121, P0122, P0123, P0125, P1114, P1115, P1121, P1122, or P1258, are not set.
^ The minimum noise level must be learned. The minimum noise level is learned when the following conditions are met:
- The engine coolant temperature (ECT) must be greater than 60°C (140°F).
- The engine RPM is between 475-975 for 10 seconds.
^ The engine speed is between 1,500-3,000 RPM.
^ The manifold absolute pressure (Map) is less than 49 kPa.
^ The engine coolant temperature (ECT) is more than 60°C (140°F).
^ The throttle angle is more than 0 percent.
^ The engine run time is more than 10 seconds.
^ The ignition voltage is more than 10 volts.

CONDITIONS FOR SETTING THE DTC
The PCM determines that this signal is less than the expected amount for more than 9 seconds.

ACTION TAKEN WHEN THE DTC SETS
^ The control module illuminates the malfunction indicator lamp (MIL) on the second consecutive ignition cycle that the diagnostic runs and fails.
^ The control module records the operating conditions at the time the diagnostic fails. The first time the diagnostic fails, the control module stores this information in the Failure Records. If the diagnostic reports a failure on the second consecutive ignition cycle, the control module records the operating conditions at the time of the failure. The control module writes the operating conditions to the Freeze Frame and updates the Failure Records.

CONDITIONS FOR CLEARING THE MIL/DTC
^ The control module turns OFF the malfunction indicator lamp (MIL) after 3 consecutive ignition cycles that the diagnostic runs and does not fail.
^ A current DTC, Last Test Failed, clears when the diagnostic runs and passes.
^ A history DTC clears after 40 consecutive warm-up cycles, if no failures are reported by this or any other emission related diagnostic.
^ Clear the MIL and the DTC with a scan tool.

DIAGNOSTIC AIDS

IMPORTANT: If the KS is dropped, the sensor must be replaced.

^ Inspect the KS for proper installation. A knock sensor that is loose or over torqued may cause the DTC to set.
^ If DTCs P0327 and P0332 are set at the same time, inspect for poor connections at the KS harness jumper, located at the left rear side of the intake manifold.
^ For an intermittent, refer to Intermittent Conditions.

TEST DESCRIPTION

Steps 1-6:

Steps 7-13:

The numbers below refer to the step numbers on the diagnostic table.
2. This verifies the malfunction is present.
3. This test will isolate the KS from the rest of the circuit.
4. Tapping on the engine block will simulate an engine knock.