P0328
DTC P0328 KNOCK SENSOR 1 CIRCUIT HIGH INPUT (BANK 1 OR SINGLE SENSOR)CIRCUIT DESCRIPTION
DTC Detection Condition:
A flat type knock sensor (non-resonant type) can detect vibration in a wide band of frequency (6 kHz to 15 kHz).
The sensor, located on the cylinder block, detects spark knock. When a spark knock occurs, the knock sensor picks up vibrations in a specific frequency range. When the ECM detects signal voltage in this frequency range, it retards the ignition timing to suppress the knocking. The ECM also senses background engine noise with the knock sensor and uses this noise to check for faults in the sensor.
Reference: Inspection using an oscilloscope.
The correct waveform is as shown.
MONITOR DESCRIPTION
Monitor Strategy:
Typical Enabling Conditions:
Typical Malfunction Thresholds:
If the output signal remains low or high for more than 10 seconds, the ECM interprets this as a fault in the knock sensor and sets a DTC.
The monitor for DTC P0327, P0328, P0332 and P0333 run after the engine is started and 5 seconds have passed.
The monitors for DTC P0325 and P0330 run after the engine is warmed up (ECT is 60 °C (140 °F) or more) and the vehicle is driven over 40 km/h (25 mph) for 1 minute.
Wiring Diagram:
Step 1:
Step 2 - 3:
Step 4 - 5:
Step 6:
INSPECTION PROCEDURE
HINT:
- DTC P0325, P0327 and P0328 are for the bank 1 knock sensor circuit.
- DTC P0330, P0332 and P0333 are for the bank 2 knock sensor circuit.
- Read freeze frame data using the hand-held tester. Freeze frame data records the engine conditions when a malfunction is detected. When troubleshooting, freeze frame data can help determine if the vehicle was running or stopped, if the engine was warmed up or not, if the air-fuel ratio was LEAN or RICH, and other data from the time the malfunction occurred.
CHECK FOR INTERMITTENT PROBLEMS
HINT: Inspect the vehicle's ECM using check mode. Intermittent problems are easier to detect when the hand-held tester is in check mode. In check mode, the hand-held tester uses 1 trip detection logic, which has a higher sensitivity to malfunctions than normal mode (default), which uses 2 trip detection logic.
a. Clear the DTCs.
b. Set the check mode.
c. Perform a simulation test.
d. Check the connector and terminal.
e. Wiggle the harness and the connector.