DTC Troubleshooting: P0328 (L4) - Honda Accord CR/CT 2012-2017

DTC Troubleshooting: P0328

DTC P0328: Knock Sensor Circuit High 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
P0328 Knock Sensor Circuit High Voltage

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
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.?

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.

Knock sensor 2P connector

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

?4.

Measure the voltage between test points 1 and 2.

Test condition	IG ON (II) or ON mode
	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 about 5.0 V?


	YES

Replace the knock sensor, then do the repair verification.


	NO

Go to step 3.

Open wire check (KNOCK line):

Open wire check (KNOCK line)

?1.

Measure the voltage between test points 1 and 2.

Test condition	IG ON (II) or ON mode
	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 about 5.0 V?


	YES

The KNOCK wire is OK. Go to step 5.


	NO

Go to step 4.

Open wire check (KNOCK line):

Open wire check (KNOCK 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.

PCM connector C (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	Knock sensor 2P connector: disconnected
	PCM connector C (51P): disconnected
Test circuit	KNOCK
Test point 1	Knock sensor 2P connector No. 1 (WHT)
Test point 2	PCM connector C (51P) No. 29 (WHT)

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 do the repair verification.


	NO

Repair an open in the KNOCK wire between the PCM (C29) and the knock sensor, then do the repair verification.

Open wire check (KS GND line):

Open wire check (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.

PCM connector C (51P)

?4.

Check for continuity between test points 1 and 2.

Test condition	IG LOCK (0) or OFF mode
	Knock sensor 2P connector: disconnected
	PCM connector C (51P): disconnected
Test circuit	KS GND
Test point 1	Knock sensor 2P connector No. 2 (BLK)
Test point 2	PCM connector C (51P) No. 28 (BLK)

Is there continuity?


	YES

The KS GND 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.


	NO

Repair an open in the KS GND wire between the PCM (C28) and the knock sensor, 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
P0328 Knock Sensor Circuit High Voltage

Is DTC P0328 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.?