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Home >> Jaguar >> 2019 >> XF S >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Exhaust System - INGENIUM I4 2.0L Diesel -- XF/(X260)) >> Exhaust System - INGENIUM I4 2.0L Diesel (G1817300) >> Diagnosis And Testing >> Exhaust System DTC: Selective Catalytic Reduction (SCR) (G2417153) >> Diesel Exhaust Fluid Quality Pinpoint Tests >> Pinpoint Test A: Diesel Exhaust Fluid Quality - P2BA9 And P20EE

Pinpoint Test A: Diesel Exhaust Fluid Quality - P2BA9 And P20EE

WARNING: This page is about a different variant/trim than selected.
  1. A1: DIESEL EXHAUST FLUID QUALITY CHECKS 
    1. Using the DEF  quality hydrometer (JLR-44-862), drain a small amount of DEF  Fluid from the tank (50ml) and check the fluid is within the acceptable (green) scale. (repeat 3 times) If in any of the 3 tests the result is not in the acceptable (green) scale, or there are any signs of debris, then drain and replace the fluid

    Does the fluid meet the specification?

    Yes 

    Proceed to next step

    No 

    If DEF  added to the vehicle by the customer is found to be of poor quality, or a different fluid other than specified (Screen-Wash or Coolant) is found, this will not be paid for under warranty. Make sure the customer is aware of any possible costs prior to completing any repair work. Replace the DEF  and proceed to next step

  2. A2: POWERTRAIN CONTROL MODULE UPDATE 
    1. Make sure the Powertrain Control Module (PCM) is updated to the latest level software

    Is the Powertrain Control Module (PCM) updated to the latest level software

    Yes 

    Proceed to next step

    No 

    Using the Jaguar Land Rover approved diagnostic equipment, update the Powertrain Control Module (PCM) to the latest level software

  3. A3: INSPECTION OF THE INTAKE SYSTEM 
    1. Check all intake pipes, exhaust pipes and joints for leaks, using the high pressure diagnostic leak detector test (95-0106)

    Was any leaks detected within the intake and exhaust systems?

    Yes 

    Repair leaking intake and exhaust systems joints as required and proceed to next step

    No 

    Proceed to next step

  4. A4: TESTING THE OPERATION OF DIESEL EXHAUST FLUID INJECTOR 
    1. Remove the DEF  injector from the exhaust
    2. Check the DEF  injector for blockage/failure. Using the Jaguar Land Rover approved SCR  diagnostic tool and application, perform an SCR dosing module test. All on-screen prompts must be followed

    Did the test pass?

    Yes 

    Proceed to next step

    No 

    Replace the dosing module and run special application - Diesel exhaust fluid prime and pressure test to prime the system following the replacement. Proceed to next step

  5. A5: INSPECTION OF THE AND CATALYTIC CONVERTER ASSEMBLY 
    NOTE: Vehicles with integral DPF  and SCR  catalytic converter assemblies should be inspected for blockage and evidence of soot. Soot on the rear face of the filter could indicate a failing DPF 
    1. Check for deposits on the front or rear face of the SCR  catalyst including mixer using a borescope. The rear face of the SCR  needs to be clear from blockage and a white/gray in color

    Was any deposits present on the SCR  catalyst faces?

    Yes 

    Replace the SCR  catalyst converter assembly

    No 

    Proceed to next step

  6. A6: CHECK PCM FOR NOX SENSOR PERFORMANCE RELATED S 
    1. Using the Jaguar Land Rover approved diagnostic equipment, check if any of the following NOx sensor related DTC  s are present on the Powertrain Control Module (PCM) prior to P2BA9 or P20EE being present P229F-28, P22A0-16, P229E-13, P22FE-64

    Was any of the NOx sensor related DTC  s listed above present on the PCM prior to P2BA9 or P20EE being present?

    Yes 

    1. Check the NOx sensor circuit for short circuit to power, short to ground, open circuit, high resistance. Repair circuit as necessary
    2. Inspect connectors for signs of water ingress and pins for damage and/or corrosion
    3. If no issues are identified with the wiring system then consider the NOx sensor to be contaminated or poisoned. This contamination will be internal to the sensor, it is not possible to clean it off so the sensor must be replaced. Install a new sensor as necessary and proceed to next step

    No 

    Proceed to next step

  7. A7: RESET SELECTIVE CATALYST REDUCTION QUALITY MONITOR 
    1. Using the Jaguar Land Rover approved diagnostic equipment, run application - Reset Selective Catalyst Reduction quality monitor

    Did the application run correctly and have all warning lights on the Instrument Cluster (IC) extinguished

    Yes 

    Test completed. No further actions required

    No 

    If the application did not run correctly, or the warning lights on the Instrument Cluster (IC) are still illuminated, run the application again

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