DTC P0327 [L3]

BME010200300W03

DTC P0327

Knock sensor circuit low input

DETECTION CONDITION

• PCM monitors input signal from knock sensor when engine is running. If input voltage at PCM terminals between 2P and 2S is excessively low, PCM determines that knock sensor circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• MIL illuminates if PCM detects the above malfunction condition during first drive cycle.
• PENDING CODE is available if PCM detects the above malfunction condition.
• FREEZE FRAME DATA is available.
• DTC is stored in the PCM memory.

POSSIBLE CAUSE

• Knock sensor malfunction
• Connector or terminal malfunction
• Open or short to ground circuit between knock sensor connector terminal A and PCM terminal 2S
• Open or short to ground circuit between knock sensor connector terminal B and PCM terminal 2P
• Short between knock sensor wires

Diagnostic procedure

STEP

INSPECTION

ACTION

1
PERFORM DTC CONFIRMATION PROCEDURE
• Perform DTC CONFIRMATION PROCEDURE.
• Is same DTC present?
Yes
Go to next step.
No
Intermittent concern exists. Go to INTERMITTENT CONCERN TROUBLESHOOTING procedure.
2
INSPECT KNOCK SENSOR CONNECTOR TERMINAL
• Turn ignition key to OFF.
• Disconnect knock sensor connector.
• Inspect for poor connection at terminals A and B (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to next step.
3
INSPECT KNOCK SENSOR
• Perform knock sensor inspection.
• Is knock sensor okay?
Yes
Go to next step.
No
Replace knock sensor, then go to next step.
4
INSPECT KNOCK SENSOR CIRCUITS FOR OPEN
• Disconnect knock sensor connector.
• Inspect continuity between the following circuits:
- Knock sensor female terminal A (harness-side) and PCM terminal 2S (harness-side)
- Knock sensor female terminal B (harness-side) and PCM terminal 2P (harness-side)
• Is there continuity?
Yes
Go to next step.
No
Repair or replace suspected wiring harness, then go to Step 8.
5
INSPECT KNOCK SENSOR CIRCUITS FOR SHORT TO GROUND
• Inspect continuity between following circuits:
- Knock sensor female terminal A (harness-side) and body ground
- Knock sensor female terminal B (harness-side) and body ground
• Is there continuity?
Yes
Repair or replace suspected wiring harness, then go to Step 8.
No
Go to next step.
6
INSPECT FOR SHORT CIRCUITS
• Inspect continuity between knock sensor female terminals A and B (harness-side).
• Is there continuity?
Yes
Repair or replace suspected harness, then go to Step 8.
No
Go to next step.
7
INSPECT PCM CONNECTOR TERMINAL
• Turn ignition key to OFF.
• Disconnect PCM connector.
• Inspect for poor connection at terminals 2P and 2S (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to next step.
8
VERIFY TROUBLESHOOTING OF DTC P0327 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Clear DTC from memory using WDS or equivalent.
• Perform KOEO/KOER self-test.
• Is same DTC present?
Yes
Replace PCM, then go to next step.
No
Go to next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to applicable DTC troubleshooting.
No
Troubleshooting completed.