DTC P0327 [AJ] (VIN: JM0 LW10J300 301406-, JMZ LW69J7*# 307683-, JM8 LW28J**# 301514-, JM8 LW28A**# 301514- (Assumed))

BME010200100W16

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 between 81 and 3 is below 1.25 V, PCM determines that knock sensor circuit has malfunction.
Diagnostic support note
• This is a continuous monitor (CCM).
• The MIL illuminates if the PCM detects the above malfunction condition in the first drive cycle.
• PENDING CODE is available if the 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 81
• Open or short to ground circuit between knock sensor connector terminal B and PCM terminal 3
• Short knock sensor two wires
• PCM malfunction

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 REPAIR INFORMATION AVAILABILITY
• Check for related Service Information and/or on-line repair information availability.
• Is any related repair information available?
Yes
Perform repair or diagnosis according to the available repair information.
• If the 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 PCM connector.
• Check for poor connection at terminals 81 and 3 (damaged, pulled-out pins, corrosion, etc.).
• Is there any malfunction?
Yes
Repair terminal, then go to Step 8.
No
Go to the next step.
4
INSPECT KNOCK SENSOR CIRCUITS FOR OPEN
• Disconnect knock sensor connector.
• Check continuity between the following circuits:
- Knock sensor female terminal A (harness-side) and PCM terminal 81 (harness-side)
- Knock sensor female terminal B (harness-side) and PCM terminal 3 (harness-side)
• Are there continuities?
Yes
Go to the next step.
No
Repair or replace suspected wiring harness, then go to Step 8.
5
INSPECT KNOCK SENSOR CIRCUITS FOR SHORT TO GROUND
• Check continuity between following circuits:
- Knock sensor female terminal A (harness-side) and body ground
- Knock sensor female terminal B (harness-side) and body ground
• Are there continuities?
Yes
Repair or replace suspected wiring harness, then go to Step 8.
No
Go to the next step.
6
CHECK FOR SHORT CIRCUITS
• Check 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 the next step.
7
CHECK KNOCK SENSOR RESISTANCE
• Inspect the knock sensor.
• Is the knock sensor normal?
Yes
Go to the next step.
No
Replace 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 memory using the WDS or equivalent.
• Start engine.
• Is same DTC present?
Yes
Replace or reprogram PCM. Then go to the next step.
No
Go to the next step.
9
VERIFY AFTER REPAIR PROCEDURE
• Perform the "After Repair Procedure".
• Are any DTCs present?
Yes
Go to the applicable DTC inspection.
No
Troubleshooting completed.