DTC Troubleshooting: P0328
DTC P0328: Knock Sensor Circuit High Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0328 Knock Sensor Circuit High Voltage
     

1.
Problem verification:

Problem verification
?1.
Turn the vehicle to the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the vehicle to the OFF (LOCK) mode.

?4.
Turn the vehicle to the ON mode.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0328 Knock Sensor Circuit High Voltage
     

Is DTC P0328 indicated?

     
YES
     
     
     
The failure is duplicated. Go to step 2.
     
NO
     
     
     
Intermittent failure, the system is OK at this time. Check for poor connections or loose terminals at the knock sensor and the PCM. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
Determine possible failure area (knock sensor, others):

Determine possible failure area (knock sensor, others)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Disconnect the following connector.
Knock sensor 2P connector

?3.
Turn the vehicle to the ON mode.

?4.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Knock sensor 2P connector: disconnected
Test point 1
Knock sensor 2P connector No. 1
Test point 2
Knock sensor 2P connector No. 2


Is there about 5.0 V?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Determine possible failure area (KS line, others):

Determine possible failure area (KS line, others)
?1.
Measure the voltage between test points 1 and 2.
Test condition
Vehicle ON mode
 
Knock sensor 2P connector: disconnected
Test point 1
Knock sensor 2P connector No. 2
Test point 2
Body ground


Is there about 5.0 V?

     
YES
     
     
     
The KS wire is OK. Go to step 5.
     
NO
     
     
     
Go to step 4.
4.
Open wire check (KS line):

Open wire check (KS line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector C (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Knock sensor 2P connector: disconnected
 
PCM connector C (51P): disconnected
Test point 1
Knock sensor 2P connector No. 2
Test point 2
PCM connector C (51P) No. 29


Is there continuity?

     
YES
     
     
     
The KS wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0328 goes away and the PCM was updated, troubleshooting is complete. If DTC P0328 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the KS wire between the PCM (C29) and the knock sensor.?
5.
Open wire check (SG7 line):

Open wire check (SG7 line)
?1.
Turn the vehicle to the OFF (LOCK) mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connector.
PCM connector C (51P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Knock sensor 2P connector: disconnected
 
PCM connector C (51P): disconnected
Test point 1
Knock sensor 2P connector No. 1
Test point 2
PCM connector C (51P) No. 28


Is there continuity?

     
YES
     
     
     
The SG7 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then recheck. If DTC P0328 goes away and the PCM was updated, troubleshooting is complete. If DTC P0328 goes away and the PCM was substituted, replace the original PCM.?
     
NO
     
     
     
Repair an open in the SG7 wire between the PCM (C28) and the knock sensor.?