P0332

Schematic:

CIRCUIT DESCRIPTION

The Powertrain Control Module (PCM) contains integrated Knock Sensor (KS) diagnostic circuitry. Input signals from the knock sensors are used to detect engine detonation, allowing the PCM to retard Ignition Control (IC) spark timing based on the amplitude and frequency of the KS signal being received. The knock sensors produce an AC signal under all engine operating conditions. During engine operation, the PCM calculates the average voltage of each knock sensors signal. If the knock sensor system is operating normally, the PCM should monitor KS signal voltages varying over 0.5 volt more than and less than the calculated average voltage. If the PCM detects a knock sensor 2 signal voltage within the calculated average voltage range, DTC P0332 will set.

CONDITIONS FOR RUNNING THE DTC
^ None of the following DTCs are set:
- Throttle Position (TP) sensor
- Vehicle Speed Sensor (VSS)
- Crankshaft Position (CKP) sensor
- Mass Air Flow (MAF) sensor
- Engine Coolant Temperature (ECT) sensor
^ The engine coolant temperature is more than 75°C (167°F).
^ The throttle angle is more than 3 percent.
^ The engine load is more than 20 percent.
^ The engine speed is between 1000 and 4000 RPM.
^ The maximum system 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 2 signal voltage within the calculated average range.

ACTION TAKEN WHEN THE DTC SETS
^ The PCM will not illuminate the malfunction indicator lamp (MIL).
^ The PCM will store conditions which were present when the DTC set as Failure Records data only. This information will not be stored as Freeze Frame data.

CONDITIONS FOR CLEARING THE MIL/DTC
^ A History DTC will clear after 40 consecutive warm-up cycles have occurred without a malfunction.
^ The DTC can be cleared by using a scan tool.

DIAGNOSTIC AIDS
Check for the following conditions:
^ A faulty connection at the PCM or the knock sensor 2-Inspect the knock sensor 2 and PCM connectors for backed out terminals, broken locks, and improperly formed or damaged terminals. Use a corresponding mating terminal to test for proper terminal tension.
^ Inspect the knock sensor harness to ensure that the harness is not routed too close to high voltage wires such as spark plug leads.

Reviewing the Failure Records vehicle mileage since the diagnostic test last failed may help determine how often the condition that caused the DTC to be set occurs. This may assist in diagnosing the condition.


TEST DESCRIPTION

Diagnostic Chart:

The numbers below refer to the step numbers on the diagnostic table.
2. Ensures that the malfunction is present.
3. If sent here from Symptoms, proceed with the diagnostic table.