DTC P0328


DTC P0328	Knock sensor circuit high input
DETECTION CONDITION	• The PCM monitors the input signal from the knock sensor when the engine is running. If the input voltage at PCM terminal 2BA is more than 3.75 V, the PCM determines that the knock sensor circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • The MIL illuminates if the PCM detects the above malfunction conditions during the first drive cycle. • The PENDING CODE is available if the PCM detects the above malfunction condition. • The FREEZE FRAME DATA is available. • The DTC is stored in the PCM memory.
POSSIBLE CAUSE	• Knock sensor malfunction • Connector or terminal malfunction • Short to power circuit between knock sensor terminal A and PCM terminal 2BA • Open circuit between knock sensor terminal A and PCM terminal 2BA


STEP	INSPECTION		ACTION
1	PERFORM DTC CONFIRMATION PROCEDURE • Perform the DTC CONFIRMATION PROCEDURE. (See DTC CONFIRMATION PROCEDURE.) • Is the same DTC present?	Yes	Go to the next step.
1		No	Intermittent concern exists. Go to the INTERMITTENT CONCERN TROUBLESHOOTING procedure. (See INTERMITTENT CONCERN TROUBLESHOOTING.)
2	INSPECT KNOCK SENSOR CONNECTOR TERMINAL • Turn the ignition switch off. • Disconnect the knock sensor connector. • Inspect for poor connection at terminal A (such as damaged, pulled-out pins, and corrosion). • Is there any malfunction?	Yes	Repair the terminal, then go to Step 7.
2		No	Go to the next step.
3	INSPECT KNOCK SENSOR • Perform the knock sensor inspection. (See KNOCK SENSOR INSPECTION.) • Is the knock sensor normal?	Yes	Go to the next step.
3		No	Replace the knock sensor, then go to Step 7.
4	INSPECT KNOCK SIGNAL CIRCUIT FOR SHORT TO POWER • Turn the ignition switch to the ON position (Engine off). • Measure the voltage between knock sensor terminal A (wiring harness-side) and body GROUND. • Is the voltage B+?	Yes	Repair or replace the wiring harness for short to power, then go to Step 7.
4		No	Go to the next step.
5	INSPECT KNOCK SIGNAL CIRCUIT FOR OPEN CIRCUIT • Disconnect the knock sensor connector. • Inspect for continuity between knock sensor female terminal A (wiring harness-side) and PCM terminal 2BA (wiring harness-side). • Is there continuity?	Yes	Go to the next step.
5		No	Repair or replace the suspected wiring harness, then go to Step 7.
6	INSPECT PCM CONNECTOR • Disconnect the PCM connector. • Inspect for poor connection (such as damaged, pulled-out pins, and corrosion). • Is there any malfunction?	Yes	Repair or replace the terminal, then go to the next step.
6		No	Go to the next step.
7	VERIFY TROUBLESHOOTING OF DTC P0328 COMPLETED • Make sure to connect all disconnected connectors. • Clear the DTC from the PCM memory using WDS or equivalent. • Perform the KOEO/KOER self-test. (See KOEO/KOER SELF-TEST.) • Is the same DTC present?	Yes	Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION.)
7		No	Go to the next step.
8	VERIFY AFTER REPAIR PROCEDURE • Perform the "AFTER REPAIR PROCEDURE". (See AFTER REPAIR PROCEDURE.) • Are any DTCs present?	Yes	Go to the applicable DTC troubleshooting. (See DTC TABLE.)
8		No	Troubleshooting completed.