Diagnostic Test

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

ACTIVE DTC
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. 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. Turn the ignition on, run the engine to operating temperature
6. Test drive the vehicle under normal operating conditions to induce the DEF system.
7. With the scan tool check for active DTCs.
  Is the DTC active?
  
  Yes
  - Go To 2
  No
  - Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
CHECK THE DEF LINES AND FITTINGS FOR LEAKS OR RESTRICTIONS
1. Turn the ignition off.
2. Visually inspect the DEF lines and fittings for signs of a leak.
3. Remove the lines from the fittings at the DEF Supply Pump Assembly and DEF Injector and inspect the fittings for signs of crystallization or blockages.
  Were any leaks or blockages found?
  
  Yes
  - Repair or replace the leaking or blocked lines or fittings as necessary. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .
  No
  - Go To 3
CHECK THE DEF PUMP ASSEMBLY
1. Reconnect all of the DEF lines.
2. Remove the DEF Injector from the Decomp Tube.
3. Place the DEF Injector in a container to capture the fluid sprayed.
4. Turn the ignition on.
5. With the scan tool, navigate to the Diesel Exhaust Fluid Injector Quantity Test.
  NOTE:
  This Test is broken up into three parts: 1-Air bleed/Build Pressure (about 30 seconds/then empty the container), 2-Main volume test (a little over one minute), 3-DEF purge (to remove excess fluid from the lines after the test). The entire procedure will run for 2-3 minutes before timing out. The amount of flow may fluctuate through out the test, therefore the test must be allowed to run completely in order for the results to be accurate. The fluid should spray out as a mist. There should be no dripping from the holes in the DEF Injector at any time during the duration of the test procedure.
6. Measure the amount of fluid sprayed after the test times out.
  Does the fluid sprayed measure between 26 ml and 35 ml?
  
  Yes
  - Repair complete. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  No
  - Replace the DEF Pump Supply Backflow connector and run the Override Test again. If the test fails with the new fitting then replace the DEF Pump Assembly in accordance with the service information. Reset the SCR Timer: Using the scan tool, go to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer). Also, test drive the vehicle for 30 miles before beginning the PCM VERIFICATION Test.
  - Perform the PCM VERIFICATION TEST. Refer to PCM VERIFICATION TEST .