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Home >> Alfa Romeo >> 2019 >> Giulia Base, AWD >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 2.0L - DTCS P0261-00 To P046C-00 >> DTC Troubleshooting >> P0332-00-Knock Sensor 2 Circuit Low >> Possible Causes >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. With the scan tool, read Powertrain Control Module (PCM) DTCs and Freeze Frame Data and record on the repair order.
    2. Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    3. With the scan tool, read PCM DTCs.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK FOR THE KS 2 SIGNAL CIRCUIT SHORTED TO THE KS 2 RETURN CIRCUIT 
    1. Disconnect the Knock Sensor 2 harness connector.
    2. Disconnect the PCM C2 harness connector.
    3. Check for continuity between the KS 2 Signal circuit and the KS 2 Return circuit in the Knock Sensor 2 harness connector.

      Is there continuity between the KS Signal circuit and the KS 2 Return circuit?

      Yes 

      • Repair the KS 2 Signal circuit for a short to the KS 2 Return circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE KS 2 SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the KS 2 Signal circuit in the Knock Sensor 2 harness connector.

      Is there continuity between ground and the KS Signal circuit?

      Yes 

      No 

      • Go To  4
  4. CHECK THE KS 2 RETURN CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the KS 2 Return circuit in the Knock Sensor 2 harness connector.

      Is there continuity between ground and the KS 2 Return circuit?

      Yes 

      No 

      • Go To  5
  5. KNOCK SENSOR 
    1. Replace the Knock Sensor 2 in accordance with the Service Information. Refer to SENSOR, KNOCK, REMOVAL AND INSTALLATION .
    2. Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
    3. Using the recorded Freeze Frame Data and the When Monitored and Set Conditions above, operate the vehicle in the conditions that set the DTC.
    4. With the scan tool, read PCM DTCs.

      Is the DTC active or pending?

      Yes 

      • Go To  6

      No 

      • Test complete.
  6. CHECK RELATED PCM AND COMPONENT CONNECTIONS 
    1. Perform any Service Bulletins that apply.
    2. Disconnect all PCM harness connectors.
    3. Disconnect all related in-line harness connections (if equipped).
    4. Disconnect the related component harness connectors.
    5. Inspect harness connectors, component connectors, and all male and female terminals for the following conditions:
      • Proper connector installation.
      • Damaged connector locks.
      • Corrosion.
      • Other signs of water intrusion.
      • Weather seal damage (if equipped).
      • Bent terminals.
      • Overheating due to a poor connection (terminal may be discolored due to excessive current draw).
      • Terminals that have been pushed back into the connector cavity.
      • Check for spread terminals and verify proper terminal tension.

      Repair any conditions that are found.

    6. Reconnect all PCM harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
    7. Reconnect all in-line harness connectors (if equipped). Be certain that all connectors are fully seated and the connector locks are fully engaged.
    8. Reconnect all related component harness connectors. Be certain that all connectors are fully seated and the connector locks are fully engaged.
    9. With the scan tool, erase DTCs.
    10. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    11. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      No 

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