DTC Troubleshooting: P0327
DTC P0327: Knock Sensor Circuit Low Voltage
NOTE: Before you troubleshoot, record all freeze data and any on-board snapshot, and review the general troubleshooting information.

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

1.
Problem verification:

Problem verification
?1.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?2.
Clear the DTC with the HDS.


?3.
Turn the ignition switch to LOCK(0), or press the engine start/stop button to select the OFF mode.

?4.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?5.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
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.?
2.
Determine possible failure area (knock sensor, others):

Determine possible failure area (knock sensor, others)
?1.
Turn the ignition switch to LOCK(0), or press the engine start/stop button to select the OFF mode.

?2.
Disconnect the following connector.

?3.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?4.
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
     
     
     
     
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 ignition switch to LOCK(0), or press the engine start/stop button to select the OFF mode.

?2.
Jump the SCS line with the HDS.


?3.
Disconnect the following connectors.

?4.
Check for continuity between test points 1 and 2.
Test condition
IG LOCK (0) or OFF mode
PCM connector C (51P) disconnected
Knock sensor 2P connector: disconnected
Test circuit
KNOCK, KS GND
Test point 1
Knock sensor 2P connector No. 1 (WHT)
Test point 2
Knock sensor 2P connector No. 2 (BLK)


Is there continuity?

     
YES
     
     
     
Repair a short in the KNOCK wire and the KS GND wire between the PCM (C28, C29) and the knock sensor, then do the repair verification.
     
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
IG LOCK (0) or OFF mode
PCM connector C (51P) disconnected
Knock sensor 2P connector: disconnected
Test circuit
KNOCK
Test point 1
Knock sensor 2P connector No. 1 (WHT)
Test point 2
Body ground


Is there continuity?

     
YES
     
     
     
Repair a short in the KNOCK wire between the PCM (C29) and the knock sensor, then do the repair verification.
     
NO
     
     
     
The KNOCK wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM, then do the repair verification.
Repair verification:

?1.
Turn the ignition switch to LOCK(0), or press the engine start/stop button to select the OFF mode.

?2.
Reconnect all connectors.

?3.
Exit the SCS mode with the HDS.


?4.
Turn the ignition switch to ON (II), or press the engine start/stop button to select the ON mode.

?5.
Reset the PCM with the HDS.


?6.
Do the PCM idle learn procedure.

?7.
Check for Pending or Confirmed DTCs with the HDS.
DTC Description
Confirmed DTC
Pending DTC
Freeze Frame
P0327 Knock Sensor Circuit Low Voltage
     


Is DTC P0327 indicated?

     
YES
     
     
     
Check for poor connections or loose terminals at the knock sensor and the PCM. If the PCM was updated, substitute a known-good PCM, then recheck. If the PCM was substituted, go to step 1.
     
NO
     
     
     
Troubleshooting is complete. If the PCM was substituted, replace the original PCM. If any other Pending or Confirmed DTCs are indicated, go to the indicated DTC's troubleshooting.?