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Home >> Dodge and Ram >> 2023 >> ProMaster 2500 >> Repair and Diagnosis >> Engine Performance >> Testing & Diagnosis >> 3.6L - DTCS P0202 To P0330 >> DTC Troubleshooting >> P0330-Knock Sensor 2 Circuit >> Diagnostic Test

Diagnostic Test

  1. CHECK FOR AN ACTIVE DTC 
    1. Start the engine.
    2. Test drive or operate the vehicle in accordance with the when monitored and set conditions.
    3. With the scan tool, read DTCs and record on the repair order.

      Is the DTC active or pending?

      Yes 

      • Go To  2

      No 

  2. CHECK THE (K242) KNOCK SENSOR 2 SIGNAL CIRCUIT FOR A SHORT TO VOLTAGE 
    1. Turn the ignition off.
    2. Disconnect the Knock Sensor 2 harness connector.
    3. Turn the ignition on.
    4. Measure the voltage between ground and the (K242) Knock Sensor 2 Signal circuit in the Knock Sensor harness connector.

      Is the voltage above 5.2 volts?

      Yes 

      • Repair the short to voltage in the (K242) Knock Sensor 2 Signal circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  3
  3. CHECK THE (K242) KNOCK SENSOR 2 SIGNAL CIRCUIT FOR AN OPEN 
    1. Turn the ignition off.
    2. Disconnect the PCM C2 harness connector.
      CAUTION:

      Do not probe the PCM harness connectors. Probing the PCM harness connectors will damage the PCM terminals resulting in poor terminal to pin connection. Install the GPEC Diagnostic Adaptor to perform the diagnosis.

    3. Connect the adapter.

      (special tool #10436, Adapter, GPEC Diagnostic)

    4. Measure the resistance of the (K242) Knock Sensor 2 Signal circuit from the Knock Sensor harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  4

      No 

      • Repair the (K242) Knock Sensor 2 Signal circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  4. CHECK THE (K924) KNOCK SENSOR 2 RETURN CIRCUIT FOR AN OPEN 
    1. Measure the resistance of the (K924) Knock Sensor 2 Return circuit from the Knock Sensor harness connector to the GPEC Adaptor.

      Is the resistance below 3.0 Ohms?

      Yes 

      • Go To  5

      No 

      • Repair the (K924) Knock Sensor 2 Return circuit for an open or high resistance.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  5. CHECK THE (K242) KNOCK SENSOR 2 SIGNAL CIRCUIT FOR A SHORT TO THE (K924) KNOCK SENSOR 2 RETURN CIRCUIT 
    1. Measure the resistance between the (K242) Knock Sensor 2 Signal circuit and the (K924) Knock Sensor 2 Return circuit in the Knock Sensor harness connector.

      Is the resistance above 10k Ohms?

      Yes 

      • Go To  6

      No 

      • Repair the short between the (K242) Knock Sensor 2 Signal circuit and the (K924) Knock Sensor 2 Return circuit.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  6. CHECK THE (K242) KNOCK SENSOR NO. 2 SIGNAL CIRCUIT FOR A SHORT TO GROUND 
    1. Check for continuity between ground and the (K242) Knock Sensor 2 Signal circuit in the Knock Sensor harness connector.

      Is there continuity between ground and the (K242) Knock Sensor 2 Signal circuit?

      Yes 

      • Repair the (K242) Knock Sensor 2 Signal circuit for a short to ground.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .

      No 

      • Go To  7
  7. CHECK THE KNOCK SENSOR 2 FOR PROPER OPERATION 
    1. Turn the ignition off.
    2. If no problems were found in the connectors, replace the Knock Sensor 2.
    3. Connect the PCM C2 harness connector.
    4. Turn the ignition on.
    5. With the scan tool, erase DTCs.
    6. Start the engine and allow it to reach normal operating temperature.
      WARNING:

      When the engine is operating, do not stand in direct line with the fan. Do not put your hands near the pulleys, belts or fan. Do not wear loose clothing. Failure to follow these instructions may result in possible serious or fatal injury.

      NOTE:

      It may be necessary to test drive the vehicle within the DTC monitoring conditions in order for this DTC to reset.

    7. With the scan tool, read DTCs.

      Is the DTC active?

      Yes 

      • Go To  8

      No 

  8. CHECK RELATED HARNESS CONNECTIONS 
    1. Disconnect all PCM harness connectors.
    2. Disconnect all related in-line harness connections (if equipped).
    3. Disconnect the related component harness connectors.
    4. 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.

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

      Did the DTC return?

      Yes 

      No 

      • The wiring or poor connection problem has been repaired.
      • Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
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