DTC P0327 [AJ] (VIN: JMZ LW19J7*# 300001-, JM0 LW10J300 300001-301405, JM6 LW10J300 300001-, JM8 LW28J**# 300001-301513)

BME010200300203

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 terminal 57 is excessively low, PCM determines that knock sensor circuit is malfunctioning.
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 not available.
• 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 57
• Open or short to ground circuit between knock sensor connector terminal B and PCM terminal 4
• Short knock sensor two wires

Diagnostic procedure

STEP

INSPECTION

ACTION

1
VERIFY FREEZE FRAME DATA HAS BEEN RECORDED
• Has FREEZE FRAME DATA been recorded?
Yes
Go to the next step.
No
Record FREEZE FRAME DATA on repair order, then go to the next step.
2
VERIFY RELATED SERVICE INFORMATION AVAILABILITY
• Check for related Service Information availability.
• Is any related Service Information available?
Yes
Perform repair or diagnosis according to available Service Information.
• If vehicle is not repaired, go to the next step.
No
Go to the next step.
3
INSPECT PCM CONNECTOR TERMINAL
• Turn the ignition switch off.
• Disconnect the PCM connector.
• Inspect for poor connection at terminals 57 and 4 (such as damaged/pulled-out pins, corrosion).
• Is there any malfunction?
Yes
Repair the terminal, then go to Step 8.
No
Go to the next step.
4
INSPECT KNOCK SENSOR CIRCUITS FOR OPEN CIRCUIT
• Disconnect the knock sensor connector.
• Inspect for continuity between the following circuits:
- Knock sensor female terminal A (wiring harness-side) and PCM terminal 57 (wiring harness-side)
- Knock sensor female terminal B (wiring harness-side) and PCM terminal 4 (wiring harness-side)
• Is there continuity?
Yes
Go to the next step.
No
Repair or replace the wiring harness, then go to Step 8.
5
INSPECT KNOCK SENSOR CIRCUITS FOR SHORT TO GROUND
• Inspect for continuity between following circuits:
- Knock sensor female terminal A (wiring harness-side) and body ground
- Knock sensor female terminal B (wiring harness-side) and body ground
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 8.
No
Go to the next step.
6
CHECK FOR SHORT CIRCUITS
• Inspect for continuity between knock sensor female terminals A and B (wiring harness-side).
• Is there continuity?
Yes
Repair or replace the wiring harness, then go to Step 8.
No
Go to the next step.
7
INSPECT KNOCK SENSOR
• Perform knock sensor inspection.
• Is the knock sensor normal?
Yes
Go to the next step.
No
Replace the knock sensor, then go to the next step.
8
VERIFY TROUBLESHOOTING OF DTC P0327 COMPLETED
• Make sure to reconnect all disconnected connectors.
• Turn the ignition switch to the ON position (Engine off).
• Clear the DTC from the PCM memory using the WDS or equivalent.
• Start the engine.
• Is the same DTC present?
Yes
Replace or reprogram the PCM. Then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform "After Repair Procedure".
• Is there any DTC present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.