DTC P0328

DTC P0328  : Knock Sensor Circuit High Voltage

NOTE:  Before you troubleshoot, review the general troubleshooting information .

DTC (PGM-FI)

1. 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)

   -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

   Courtesy of HONDA, U.S.A., INC.

   Is there about 5.0 V?

   YES 

   Replace the knock sensor .

   NO 

   Go to step 3.

3. Determine possible failure area (KNOCK line, KSGND line)

   -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

   Courtesy of HONDA, U.S.A., INC.

   Is there about 5.0 V?

   YES 

   Go to step 4.

   NO 

   Go to step 5.

4. Open wire check (KSGND 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. Connect terminals A and B with a jumper wire.

   Terminal A	Knock sensor 2P connector No. 1
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Knock sensor 2P connector: disconnected
   	Knock sensor 2P connector No. 1: jumped to body ground
   	PCM connector C (51P): disconnected
   Test point 1	PCM connector C (51P) No. 28
   Test point 2	Body ground

   Is there continuity?

   YES 

   The KSGND 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 KSGND wire between the PCM (C28) and the knock sensor.

5. Open wire check (KNOCK 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. Connect terminals A and B with a jumper wire.

   Terminal A	Knock sensor 2P connector No. 2
   Terminal B	Body ground

   Courtesy of HONDA, U.S.A., INC.

   -5. Check for continuity between test points 1 and 2.

   Test condition	Vehicle OFF (LOCK) mode
   	Knock sensor 2P connector: disconnected
   	Knock sensor 2P connector No. 2: jumped to body ground
   	PCM connector C (51P): disconnected
   Test point 1	PCM connector C (51P) No. 29
   Test point 2	Body ground

   Is there continuity?

   YES 

   The KNOCK 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 KNOCK wire between the PCM (C29) and the knock sensor.