P0327

DTC P0327 / P0328

DTC Detecting Condition and Trouble Area






Wiring Diagram










DTC Confirmation Procedure

WARNING:

If you do not select a suitable route and take proper precautions when performing a road test, an accident can occur.

- Select a level road with no traffic to minimize the risk of accident.
- Perform the test extremely carefully.
- Perform the road test using 2 persons, a driver and an assistant.

1) Warm up engine to normal operating temperature.
2) Run engine at idle speed for 1 min.

DTC Troubleshooting

1.
Was "Engine and Emission Control System Check" performed?
YES -
Go to Step 2.
NO -
Go to Engine and Emission Control System Check Engine and Emission Control System Check.

2. Knock sensor signal circuit and ground circuit check

Turn OFF ignition switch and disconnect connectors from knock sensor and ECM.
Check for proper terminal connection to knock sensor and ECM connectors.
If connections are OK, check that knock sensor signal circuit (A1) and ground circuit (A2) are as follows.
- Wiring harness resistance of each knock sensor signal circuit and ground circuit is less than 3 ohms.
- Insulation resistance of knock sensor signal circuit is infinity between knock sensor connector and vehicle body ground.
- Insulation resistance of wire harness is infinity between knock sensor signal circuit terminal and the other terminal at knock sensor connector.
- Circuit voltage of each knock sensor signal circuit and ground circuit is 0 - 1 V with ignition switch in ON position.

Are they in good condition?
YES -
Go to Step 3.
NO -
Repair or replace defective wire harness.

3. Knock sensor check

Check knock sensor. Knock Sensor Inspection

Is it in good condition?
YES -
Substitute a known-good ECM and recheck.
NO -
Replace knock sensor.