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DTC P0327 [L3 Turbo]

id0102b7806700

DTC P0327 | Knock sensor circuit low input
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DETECTION CONDITION | • PCM monitors the input signal from the knock sensor when the engine is running. If the input voltage at the PCM terminals between 2P and 2S is below 0.12 V, the PCM determines that the knock sensor circuit has a malfunction. Diagnostic support note • This is a continuous monitor (CCM). • MIL illuminates if the PCM detects the above malfunction condition during first drive cycle. • FREEZE FRAME DATA is available. • DTCs are 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 • Knock sensor wires (2) shorted • PCM malfunction

Diagnostic procedure

STEP | INSPECTION | ACTION
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1 | VERIFY FREEZE FRAME DATA AND DIAGNOSTIC MONITORING TEST RESULTS HAS BEEN RECORDED • Has FREEZE FRAME DATA been recorded? | Yes | Go to the next step.
No | Record the FREEZE FRAME DATA on the repair order, then go to the next step.
2 | VERIFY RELATED REPAIR INFORMATION AVAILABILITY • Verify related Service Information availability. • Is any related Service Information available? | Yes | Perform repair or diagnosis according to the available Service information. If the vehicle is not repaired, go to the next step.
No | Go to the next step.
3 | INSPECT KNOCK SENSOR CONNECTOR TERMINAL FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the knock sensor connector. • Check for poor connection at terminals A and B (such as damaged, pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair the terminal, then go to Step 9.
No | Go to the next step.
4 | INSPECT KNOCK SENSOR • Perform the knock sensor inspection. (See KNOCK SENSOR (KS) INSPECTION [L3 Turbo].) • Is the knock sensor normal? | Yes | Go to the next step.
No | Replace the knock sensor, then go to the next step.
5 | INSPECT KNOCK SENSOR CIRCUITS FOR OPEN CIRCUIT • Disconnect the knock sensor connector. • Inspect the 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 the next step.
No | Repair or replace the suspected wiring harness, then go to Step 9.
6 | INSPECT KNOCK SENSOR CIRCUITS FOR SHORT TO GROUND • Inspect the continuity between the 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 the suspected wiring harness, then go to Step 9.
No | Go to the next step.
7 | INSPECT FOR SHORT CIRCUITS • Inspect for continuity between knock sensor female terminals A and B (harness-side). • Is there continuity? | Yes | Repair or replace the suspected wiring harness, then go to Step 9.
No | Go to the next step.
8 | INSPECT PCM CONNECTOR TERMINAL FOR POOR CONNECTION • Turn the ignition switch off. • Disconnect the PCM connector. • Inspect for poor connection at terminals 2P and 2S (such as damaged, pulled-out pins, corrosion). • Is there any malfunction? | Yes | Repair the terminal, then go to the next step.
No | Go to the next step.
9 | VERIFY TROUBLESHOOTING OF DTC P0327 COMPLETED • Make sure to reconnect all disconnected connectors. • Turn ignition switch to the ON position (Engine off). • Clear the DTC from the PCM memory using the WDS or equivalent. • Start the engine and warm it up completely. • Is the same DTC present? | Yes | Replace the PCM, then go to the next step. (See PCM REMOVAL/INSTALLATION [L3 Turbo].)
No | Go to the next step.
10 | VERIFY AFTER REPAIR PROCEDURE • Perform the "After Repair Procedure". (See AFTER REPAIR PROCEDURE [L3 Turbo].) • Are any DTCs present? | Yes | Go to the applicable DTC inspection. (See DTC TABLE [L3 Turbo].)
No | Troubleshooting completed.