Diagnostic Test

WARNING: This page is about a different car, the 2011 RAM Pickup. However, it is still accessible from the selected car via links, so may be relevant.

ACTIVE DTC
1. Turn the ignition on.
2. With the scan tool, record all Freeze frame data.
3. With the scan tool, erase DTCs.
4. Turn the ignition off for 75 seconds.
5. Start the engine and let idle for up to five minutes.
6. With the scan tool, read DTCs.
  Did the DTC reset?
  
  Yes
  - Go To 2.
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT CONDITION - 6.7L .
CHECK THE (K99) O2 1/1 HEATER SUPPLY CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 1: O2 Sensor 1/1 Connector Pin ID & O2 Sensor Module Connector Pin ID
Courtesy of CHRYSLER LLC
1. Disconnect the Oxygen Sensor 1/1 harness connector.
2. Disconnect the Smart O2 Sensor Module harness connector.
  NOTE:
  Check connectors - Clean/repair as necessary, inspect for signs of Water intrusion in the connector.
3. Measure the resistance of the (K99) O2 Sensor 1/1 Heater Supply circuit between the O2 Sensor 1/1 harness connector and the Smart O2 Sensor Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 3.
  No
  - Repair the (K99) O2 Sensor 1/1 Heater Supply circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE (K79) O2 1/1 HEATER RETURN CIRCUIT FOR AN OPEN/HIGH RESISTANCE

Fig 2: O2 Sensor 1/1 Connector Pin ID & O2 Sensor Module Connector Pin ID
Courtesy of CHRYSLER LLC
1. Measure the resistance of the (K79) O2 Sensor 1/1 Heater Return circuit between the O2 Sensor 1/1 harness connector and the Smart O2 Sensor Module harness connector.
  Is the resistance below 5.0 Ohms?
  
  Yes
  - Go To 4.
  No
  - Repair the (K79) O2 Sensor 1/1 Heater Return circuit for an open or high resistance.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
CHECK THE OXYGEN SENSOR

Fig 3: O2 Sensor 1/2 Terminal ID (Component ID)
Courtesy of CHRYSLER LLC
1. Measure resistance of the O2 Sensor Heater between the (K99) O2 Sensor 1/1 Heater Supply and (K79) O2 Sensor 1/1 Heater Return circuit at the O2 Sensor.
  Is the resistance 3.2 +/- 0.8 Ohms at ambient temperature?
  
  Yes
  - Replace Smart O2 Sensor Module in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .
  No
  - Replace the O2 Sensor in accordance with the service information.
  - Perform the POWERTRAIN VERIFICATION TEST TEST - 6.7L. Refer to POWERTRAIN VERIFICATION TEST - 6.7L .