DTC P0328

DTC P0328  : Knock Sensor 1 (Bank 1) Circuit High Voltage

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 1 (Bank 1) 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 knock sensor 1 (Bank 1) 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 1 (Bank 1) 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 1 (Bank 1) 2P connector: disconnected
   Test circuit	KS B1, KSSGB1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 1 (GRN)
   Test point 2	Knock sensor 1 (Bank 1) 2P connector No. 2 (RED)

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

   Is there about 5.0 V?

   YES 

   Replace knock sensor 1 (Bank 1) .

   NO 

   Go to step 3.

3. Open wire check (KS B1 line)

   -1. Measure the voltage between test points 1 and 2.

   Test condition	Vehicle ON mode
   	Knock sensor 1 (Bank 1) 2P connector: disconnected
   Test circuit	KS B1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 2 (RED)
   Test point 2	Body ground

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

   Is there about 5.0 V?

   YES 

   The KS B1 wire is OK. Go to step 5.

   NO 

   Go to step 4.

4. Open wire check (KSB1/KS B1 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) - Refer to: How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016), or How to Troubleshoot the A/T System (2014 2015), or How to Troubleshoot the Fuel and Emissions Systems

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

   Test condition	Vehicle OFF (LOCK) mode
   	Knock sensor 1 (Bank 1) 2P connector: disconnected
   	PCM connector C (51P): disconnected
   Test circuit	KSB1, KS B1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 2 (RED)
   Test point 2	PCM connector C (51P) No. 41 (RED)

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

   Is there continuity?

   YES 

   The KSB1/KS B1 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2014 2015), or PCM Removal and Installation (2016) .

   NO 

   Repair an open in the KSB1/KS B1 wire between the PCM (C41) and knock sensor 1 (Bank 1).

5. Open wire check (KSSGB1 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) - Refer to: How to Troubleshoot the Fuel and Emissions Systems, or How to Troubleshoot the Brake Booster Pressure Monitoring System (2016 2017 2018 2019 2020), or How to Troubleshoot the Fuel and Emissions Systems(With Auto Idle Stop System) (2016), or How to Troubleshoot the A/T System (2014 2015)

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

   Test condition	Vehicle OFF (LOCK) mode
   	Knock sensor 1 (Bank 1) 2P connector: disconnected
   	PCM connector C (51P): disconnected
   Test circuit	KSSGB1
   Test point 1	Knock sensor 1 (Bank 1) 2P connector No. 1 (GRN)
   Test point 2	PCM connector C (51P) No. 42 (GRN)

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

   Is there continuity?

   YES 

   The KSSGB1 wire is OK. Update the PCM if it does not have the latest software, or substitute a known-good PCM - Refer to: PCM Removal and Installation (2016), or PCM Removal and Installation (2014 2015) .

   NO 

   Repair an open in the KSSGB1 wire between the PCM (C42) and knock sensor 1 (Bank 1).