Diagnostic Test

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, read DTCs. Record DTC and Freeze Frame information.
3. Start the engine and allow it to idle for at least 60 seconds.
  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.
4. With the scan tool, read DTCs.
  Is the DTC Active or Pending at this time?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION .
(K41) O2 SENSOR 1/1 SIGNAL CIRCUIT
1. Turn the ignition off.
2. Disconnect the O2 Sensor 1/1 harness connector.
3. Ignition on, engine not running.
4. With the scan tool, monitor the O2 Sensor 1/1 voltage.
  Is the O2 Sensor 1/1 voltage between 4.1 and 5.0 Volts?
  
  Yes
  - Go To 3
  No
  - Go To 5
O2 SENSOR 1/1

Fig 1: Checking O2 Sensor Return Circuit Voltage
Courtesy of CHRYSLER GROUP, LLC
1. Measure the voltage on the (K904) O2 Sensor 1/1 Return circuit in the O2 Sensor harness connector.
  Is the voltage at 2.5 Volts?
  
  Yes
  - Verify that there is good pin to terminal contact in the O2 Sensor 1/1 and Powertrain Control Module connectors. If OK, replace the 1/1 O2 Sensor. Refer to SENSOR, OXYGEN, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 4
(K904) O2 SENSOR 1/1 RETURN CIRCUIT SHORTED TO GROUND

Fig 2: Checking O2 Sensor Return Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance between ground and the (K904) O2 Sensor 1/1 Return circuit in the O2 Sensor 1/1 harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short to ground in the (K904) O2 Sensor 1/1 Return circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 8
(K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO GROUND

Fig 3: Checking O2 Sensor Signal Circuit For Short To Ground
Courtesy of CHRYSLER GROUP, LLC
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Measure the resistance between ground and the (K41) O2 Sensor 1/1 Signal circuit in the O2 Sensor 1/1 harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short to ground in the (K41) O2 Sensor 1/1 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 6
(K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO THE (K904) O2 SENSOR 1/1 RETURN UPSTREAM CIRCUIT

Fig 4: Checking O2 Sensor Signal Circuit For Short To O2 Return Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (K41) O2 Sensor 1/1 Signal circuit and the (K904) O2 Sensor 1/1 Return circuit in the O2 Sensor 1/1 harness connector.
  Is the resistance below 10k Ohms?
  
  Yes
  - Repair the short between the (K904) O2 Sensor 1/1 Return circuit and the (K41) O2 Sensor 1/1 Signal circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 7
(K41) O2 SENSOR 1/1 SIGNAL CIRCUIT SHORTED TO THE O2 SENSOR 1/1 HEATER GROUND CIRCUIT

Fig 5: Checking O2 Sensor Signal Circuit For Short To O2 Heater Ground Circuit
Courtesy of CHRYSLER GROUP, LLC
1. Measure the resistance between the (K41) O2 Sensor 1/1 Signal circuit and the O2 Sensor 1/1 Heater ground circuit in the O2 Sensor 1/1 harness connector.
  Is the resistance below 100 Ohms?
  
  Yes
  - Repair the short between the (K41) O2 Sensor 1/1 Signal circuit and the O2 Sensor 1/1 Heater ground circuit.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .
  No
  - Go To 8
POWERTRAIN CONTROL MODULE (PCM)
1. Using the wiring diagram/schematic as a guide, inspect the wiring and connectors between the Oxygen Sensor 1/1 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. Verify that there is good pin to terminal contact in the Oxygen Sensor 1/1 and Powertrain Control Module connectors.
4. Perform any Technical Service Bulletins that may apply.
  Were there 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 in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL, REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to POWERTRAIN VERIFICATION TEST .