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Home >> Jeep >> 2022 >> Gladiator Mojave, Part Time T/Case Control, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 27 (3.0L Diesel - DTCS P2016-00 To P208D-00) >> DTC Troubleshooting >> P202E-00-REDUCTANT Injection Valve Circuit Performance >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. READ AND RECORD DTCS AND ENVIRONMENTAL DATA - ERASE DTCS AND CHECK FOR THE DTC TO RETURN 
    1. With the scan tool, read DTCs in all Electronic Control Units (ECUs) and record on the repair order.
    2. For future reference, run and save a vehicle Scan Report and all related recorded data.
    3. With the scan tool, erase all DTCs.
    4. Turn the ignition off for a minimum of 10.0 seconds.
    5. Turn the ignition on.
    6. Using the When Monitored and Set Conditions above and recorded data, operate the vehicle in the conditions that set the DTC.
    7. With the scan tool, read DTCs.

      Did the DTC return?

      Yes 

      • Go To  2

      No 

      • Perform the INTERMITTENT CONDITION diagnostic procedure. Refer to INTERMITTENT DTC .
  2. VERIFY DIESEL EXHAUST FLUID (DEF) TANK TEMPERATURE 
    1. With the scan tool, verify tank temperature.

      Is the temperature below 12°F (-11°C)?

      Yes 

      • Let vehicle thaw in a warm area, above freezing until the tank temperature reads above 32°F (0°C) before continuing diagnosis.
      • Go To  3

      No 

      • Go To  3
  3. CHECK THE RESISTANCE OF THE DEF INJECTOR 
    1. Disconnect the DEF injector connector and measure the internal injector resistance.

      Is the resistance between 11.4 and 12.6 ohms?

      Yes 

      • Go To  4

      No 

  4. CHECK THE DEF INJECTOR FOR PROPER OPERATION 
    1. Turn ignition off.
    2. Reconnect all disconnected electrical connectors except for the DEF Injector.
    3. Remove the DEF Injector from the exhaust pipe.
    4. Reconnect the DEF Injector harness connector.
    5. Place the DEF Injector in a container to capture the fluid sprayed.
    6. Turn the ignition on.
    7. 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.

    8. Measure the amount of fluid sprayed after the test times out.

      Does the fluid sprayed measure between 26 ml and 35 ml?

      Yes 

      • The DEF Injector is functioning properly. Remove the DEF Pressure line from the DEF Injector and DEF Supply Pump Assembly and check the fittings for a partial restriction which could cause an intermittent low flow condition.
      • Reset the SCR timer: Using the scan tool, got to Misc. Functions>SCR Extend Mileage W Active Fault (and reset the Timer).

        An extended test drive (up to 30 miles) may be required in order to ensure that the POWERTRAIN VERIFICATION TEST results are accurate. 

      • Perform the POWERTRAIN VERIFICATION TEST. Refer to 3.0L, POWERTRAIN VERIFICATION TEST .

      No 

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