DTC P0325-11: Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground [02/2019 - 10/2019]: Description
A flat-type knock control sensor (non-resonant type) has a structure that can detect vibrations between approximately 5 and 15 kHz.
The knock control sensor is fitted onto the engine block to detect engine knocking.
The knock control sensor contains a piezoelectric element which generates a voltage when it becomes deformed.
The voltage is generated when the engine block vibrates due to knocking. Any occurrence of engine knocking can be suppressed by delaying the ignition timing.
HINT:
When DTC P0325-11 is stored, the ECM enters fail-safe mode. During fail-safe mode, the ignition timing is delayed to its maximum retardation. Fail-safe mode continues until the ignition switch is turned off.
| DTC No. | Detection Item | DTC Detection Condition | Trouble Area | MIL | Memory | Note |
|---|---|---|---|---|---|---|
| P0325-11 | Knock Sensor 1 Bank 1 or Single Sensor Circuit Short to Ground | The knock control sensor output voltage is less than 0.5 V for 1 second or more (1 trip detection logic). |
|
Comes on | DTC stored | SAE Code: P0327 |
Reference: Inspection using an oscilloscope
HINT:
The correct waveform is as shown.
| ECM Terminal Name | Between KNK1 and EKNK |
| Tester Range | 1 V/DIV., 1 ms./DIV. |
| Condition | Engine speed maintained at 2500 rpm after warming up engine |