Diagnostic Test

WARNING: This page is about a different variant/trim than selected.

DTC IS ACTIVE
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the PCM.
3. Start the engine and allow the engine to reach normal operating temperature.
4. Monitor the scan tool for at least two minutes.
5. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK FOR OTHER DTCS
1. Refer to the recorded DTCs.
  Are there any P20BD, P20BF, or P20C0 DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE DEF LINE HEATER ASSEMBLY FOR PROPER OPERATION
1. Turn the ignition off.
2. Replace the DEF Line Heater Assembly in accordance with the service information.
3. Ignition on, engine not running.
4. With the scan tool, erase DTCs in the PCM.
5. Start the engine.
6. Allow the engine to reach normal operating temperature.
7. Monitor the scan tool for at least two minutes.
8. With the scan tool, select View DTCs.
  Is the status Active for this DTC?
  
  Yes
  - Replace the Heater Control Unit (HCU) in accordance with the service information.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Test Complete.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .