DTC Troubleshooting: P0327
DTC P0327: Knock Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, review the general troubleshooting information.

DTC Description
Confirmed DTC
Pending DTC
P0327 Knock Sensor Circuit Low 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
P0327 Knock Sensor Circuit Low Voltage
    

Is DTC P0327 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 on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the 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.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
P0328 Knock Sensor Circuit High Voltage
    

Is DTC P0328 indicated?

     
YES
     
     
     
     
NO
     
     
     
Go to step 3.
3.
Shorted wire check (KNOCK line to KS GND line):

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

?2.
Jump the SCS line with the HDS, and wait more than 1 minute.


?3.
Disconnect the following connector.
PCM connector E (80P)

?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Knock sensor 2P connector: disconnected
 
PCM connector E (80P) disconnected
Test point 1
Knock sensor 2P connector No. 1
Test point 2
Knock sensor 2P connector No. 2


Is there continuity?

     
YES
     
     
     
Repair a short in the KNOCK wire to the KS GND wire between the PCM and the knock sensor.?
     
NO
     
     
     
Go to step 4.
4.
Shorted wire check (KNOCK line):

Shorted wire check (KNOCK line)
?1.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
 
Knock sensor 2P connector: disconnected
 
PCM connector E (80P) disconnected
Test point 1
Knock sensor 2P connector No. 2
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the KNOCK wire between the PCM (E35) and the knock sensor.?
     
NO
     
     
     
The KNOCK wire is OK. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting, or substitute a known-good PCM, then recheck. If DTC P0327 goes away and the PCM was substituted, replace the original PCM.?