Diagnostic Test

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

CHECK FOR ACTIVE DTC
1. Ignition on, engine not running.
2. With the scan tool, erase DTCs in the Powertrain Control Module (PCM).
3. Start the engine and allow to reach operating temperature.
4. Test drive the vehicle during normal operating conditions.
5. With the scan tool, read the PCM DTCs.
  Did this DTC return?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK FOR OTHER DTCS
NOTE:
Inspect the Diesel Exhaust Fluid before continuing with this Diagnostic Tree. If there is evidence of contamination or degraded fluid; Perform the Diagnostic and Testing - Diesel Exhaust Fluid procedure.

Refer to DIESEL EXHAUST FLUID EMISSIONS, DIAGNOSIS AND TESTING .
1. Refer to the recorded DTCs.
  Are there any P1690, P1691, P1692, or P1693 DTCs active or pending?
  
  Yes
  - Perform the applicable diagnostic procedure(s). Refer to DIAGNOSTIC CODE INDEX .
  No
  - Go To 3
CHECK THE DEF INJECTOR HARNESS CONNECTOR FOR DAMAGE
1. Turn the ignition off.
2. Disconnect the PCM C2 harness connector.
3. Disconnect the DEF Injector harness connector.
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.
  - Perform a terminal drag test on each connector terminal to verify proper terminal tension.
  Repair any conditions that are found.
5. Reconnect all harness connectors. Be certain that all harness connectors are fully seated and the connector locks are fully engaged.
6. Ignition on, engine not running.
7. With the scan tool, erase DTCs in the Powertrain Control Module (PCM).
8. Start the engine and allow to reach operating temperature.
9. Test drive the vehicle during normal operating conditions.
10. With the scan tool, read the PCM DTCs.
  Does the scan tool display this DTC?
  
  Yes
  - Go To 4
  No
  - Test complete. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer).
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
CHECK THE DEF INJECTOR FOR PROPER OPERATION
1. Turn the ignition off.
2. Replace the DEF Injector in accordance with the Service Information. Refer to INJECTOR, DIESEL EXHAUST FLUID, REMOVAL .
3. Ignition on, engine not running.
4. With the scan tool, erase DTCs in the Powertrain Control Module (PCM).
5. Start the engine and allow to reach operating temperature.
6. Test drive the vehicle during normal operating conditions.
7. With the scan tool, read the PCM DTCs.
  Does the scan tool display this DTC?
  
  Yes
  - Go To 5
  No
  - Test complete. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer).
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
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
  - Replace and program the Powertrain Control Module (PCM) in accordance with the Service Information. Refer to MODULE, POWERTRAIN CONTROL (PCM), REMOVAL .
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Repair the poor connections.
  - Perform the POWERTRAIN VERIFICATION TEST. Refer to PCM VERIFICATION TEST .