Diagnostic Test

ACTIVE DTC
1. Start the engine.
2. Allow the engine to reach normal operating temperature.
3. With the scan tool, select View DTCs.
  NOTE:
  It may be necessary to drive the vehicle to meet the conditions to set this DTC, try to repeat the conditions in which the fault originally set by reviewing the Freeze Frame data.
  
  Is the DTC Active or Pending at this time?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
(K242) KNOCK SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO VOLTAGE

Fig 1: Checking Knock Sensor Signal Circuit For Short To Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the Knock Sensor No. 2 harness connector.
3. Disconnect the PCM C2 harness connector.
4. Ignition on, engine not running.
5. Measure the voltage on the (K242) Knock Sensor No. 2 Signal circuit in the Knock Sensor harness connector.
  Is there any voltage present?
  
  Yes
  - Repair the short to voltage in the (K242) Knock Sensor No. 2 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 3
(K242) KNOCK SENSOR NO. 2 SIGNAL CIRCUIT OPEN

Fig 2: Checking Knock Sensor No. 2 Signal Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Measure the resistance of the (K242) Knock Sensor No. 2 Signal circuit from the Knock Sensor harness connector to the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4
  No
  - Repair the open in the (K242) Knock Sensor No. 2 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
(K924) KNOCK SENSOR NO. 2 RETURN CIRCUIT OPEN

Fig 3: Checking Knock Sensor No. 2 Return Circuit For Open
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance of the (K924) Knock Sensor No. 2 Return circuit from the Knock Sensor harness connector to the PCM C2 harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 5
  No
  - Repair the open in the (K924) Knock Sensor No. 2 Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
(K242) KNOCK SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO THE (K924) KNOCK SENSOR NO. 2 RETURN CIRCUIT

Fig 4: Checking Knock Sensor Signal Circuit For Short To Knock Sensor Return Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (K242) Knock Sensor No. 2 Signal circuit and the (K924) Knock Sensor No. 2 Return circuit in the Knock Sensor harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short between the (K242) Knock Sensor No. 2 Signal circuit and the (K924) Knock Sensor No. 2 Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
(K242) KNOCK SENSOR NO. 2 SIGNAL CIRCUIT SHORTED TO GROUND

Fig 5: Checking Knock Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between ground and the (K242) Knock Sensor No. 2 Signal circuit in the Knock Sensor harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short to ground in the (K242) Knock Sensor No. 2 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
KNOCK SENSOR 2
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, clear 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, select View DTCs.
  Is the DTC Active at this time?
  
  Yes
  - Go To 8
  No
  - Test complete.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Knock Sensor 2 and the Powertrain Control Module (PCM).
2. Look for any chafed, pierced, pinched or partially broken wires.
3. Look for broken, bent, pushed out or corroded terminals.
4. Perform any Technical Service Bulletins that may apply.
  Were any problems found?
  
  Yes
  - Repair as necessary.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .