DTC P0327 / P0328
Precautions: General safety (00)
DTC Detecting Condition and Trouble Area
| DTC detecting condition | Trouble area |
|---|---|
|
P0327: Knock Sensor 1 Circuit Low Output voltage of knock sensor signal circuit is lower than specified value for specified time with engine running. (3 D/C detection logic) |
•Knock sensor and/or its circuit
•ECM |
|
P0328: Knock Sensor 1 Circuit High Output voltage of knock sensor signal circuit is higher than specified value for specified time with engine running. (3 D/C detection logic) |
Circuit Diagram
| [A]: | ECM connector (View: [a]) | B1: | Knock sensor signal circuit 2 | 2. | ECM |
| A1: | Knock sensor signal circuit 1 | 1. | Knock sensor |
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 with 2 persons, a driver and a tester.
•Perform the test extremely carefully.
•Perform the road test with 2 persons, a driver and a tester.
NOTE:
Check that the following condition is met in this “DTC Confirmation Procedure”.
•ECT > 40 °C (104 °F)
1)Warm up engine to normal operating temperature.
2)Drive vehicle at 80 to 100 km/h (50 to 62 mile/h) constantly for 5 min. while engine keeps running at 2,400 rpm or more. (Keep throttle valve opening constant in this step.)
DTC Troubleshooting
| Step | Action | Yes | No |
|---|---|---|---|
| 1 |
Was “Engine and Emission Control System Check” performed?
|
Go to Step 2.
|
|
| 2 |
Knock sensor signal circuit check
1)With ignition “OFF”, disconnect “C01” and “E01” connectors of ECM and knock sensor connector.
2)Check for proper terminal connection to “C01” and “E01” connectors and knock sensor connector.
3)If connections are OK, check the following points.
•Resistance of “A1” and “B1” circuits: less than 1 Ω
•Resistance between each of “A1” and “B1” circuits and ground: infinity •Resistance between “A1” circuit terminal and “B1” circuit terminal at knock sensor connector: infinity •Voltage of “A1” and “B1” circuits: approx. 0 V (When ignition is “ON”) Is check result OK?
|
Go to Step 3.
|
Repair or replace defective wire harness.
|
| 3 |
Knock sensor check
1)Check knock sensor.
Is check result OK?
|
Go to Step 4.
|
Replace knock sensor.
|
| 4 |
Troubleshooting of other DTC(s) at the same time
Is other DTC(s) detected together?
|
Go to troubleshooting for applicable DTC.
|
Replace ECM and recheck DTC.
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