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Home >> Jaguar >> 2019 >> XF S >> Repair and Diagnosis >> External Pages >> Different car >> Section 184 (Seating -- XE/(760)) >> Seating (G2260444) >> Diagnosis And Testing >> Seats - Vehicles With: Lumbar/Massage (G2105548) >> Pinpoint Tests >> Pinpoint Test J: Memory Seat Bolster Deflate Tests

Pinpoint Test J: Memory Seat Bolster Deflate Tests

WARNING: This page is about a different car, the 2020 Jaguar XE and 2019 Jaguar XE. However, it is still accessible from the selected car via links, so may be relevant.
  1. J1: MEMORY SEAT BOLSTER DEFLATE TEST 1 
    NOTE: Some DTCs can only be set if the fault is detected during the On Demand Self Test routine.
    1. Using the Jaguar Land Rover approved diagnostic equipment, perform routine - On Demand Self Test
    2. Using the Jaguar Land Rover approved diagnostic equipment, check the relevant seat module for related DTCs and refer to the relevant DTC index

      Are any relevant DTCs set?

      Yes 

      Perform the relevant corrective action

      No 

      GO to  J2.

  2. J2: MEMORY SEAT BOLSTER DEFLATE TEST 2 
    NOTE: The battery support unit must be connected during this test to make sure that the power supply is stable.
    NOTE:
    • Circuit reference - VBATT -
    • The bolster deflate circuit current specification is 0.50A ± 10%.
    1. Connect an inductive ammeter to the seat switchpack power circuit
    2. Set the ignition to on
    3. Operate the seat switchpack bolster deflate switch

      Is the measured current less than specification?

      Yes 

      GO to  J3.

      No 

      Check the bolster air cell hoses for blockages

  3. J3: MEMORY SEAT BOLSTER DEFLATE TEST 3 
    NOTE: Do not disconnect the electrical connector during this step; the seat switchpack is removed for access to the wiring harness only.
    1. Refer to the relevant article of the repair information and remove the seat switchpack
    2. Set a multimeter to measure voltage
    3. Using the multimeter, measure and record the battery voltage (reference voltage)
      NOTE: Circuit reference - BOLSTER DEF/GND -
    4. Connect the multimeter across the seat switchpack bolster deflate terminal and the ground terminal
    5. Set the ignition to on
    6. Operate the seat switchpack bolster deflate switch

      Is the measured voltage less than battery voltage?

      Yes 

      GO to PINPOINT TEST A .

      No 

      Refer to the electrical circuit diagrams and check the bolster deflate circuit for short circuit to ground, short circuit to power, open circuit, high resistance

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