P0332

CIRCUIT DESCRIPTION
The Powertrain Control Module (PCM) contains integrated Knock Sensor (KS) diagnostic circuitry. The KS produces an AC voltage at all engine speeds and loads. The PCM then adjusts spark timing based on the amplitude and frequency of the KS signal. The PCM uses the KS signal to calculate the average voltage. Then, the PCM assigns a voltage value. The PCM checks the KS and related wiring by comparing the actual knock signal to the assigned voltage range. A normal KS signal should stay outside the assigned voltage range. This DTC will set if the KS signal is within the assigned voltage range or if the KS signal is not present.

CONDITIONS FOR RUNNING THE DTC
^ DTCs P0112, P0113, P0121, P0122, P0123 P0341, P0336, P0506, or P0507 are not set.
^ The engine speed is between 1,000-5,000 RPM.
^ The engine has been running for a minimum of 30 seconds.
^ The throttle angle is more than 15 percent.
^ The engine load is more than 40 percent.
^ The engine coolant temperature is more than 60°C (153°F).
^ The maximum spark retard is less than 15 degrees.
^ The system voltage is more than 9 volts.

CONDITIONS FOR SETTING THE DTC
^ The PCM detects a knock sensor signal voltage within the calculated average voltage range for at least 10 seconds.
^ The engine run time is more than 30 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.
^ Use a scan tool in order to clear the MIL and the DTC.

TEST DESCRIPTION

Steps 1-3:

Steps 4-11:

The numbers below refer to the step numbers on the diagnostic table.
2. This step ensures that the malfunction is present.
3. If either the 24X crank sensor or the cam signal are not present, the KS signal will stop updating and may set DTC P0327. The 12-volt reference supply and the low reference need to be diagnosed using the DTC P0336.