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Home >> Lincoln >> 2002 >> Navigator 4WD >> Repair and Diagnosis >> Steering >> Steering Column >> Steering System-General Information >> Diagnosis And Testing >> Steering System >> Function Test - With Air Suspension >> PID Test

PID Test

  1. Monitor the PIDs STEER_A, STEER_B, and VSS_AS (or VSS_ARC).
  2. Rotate the steering wheel 90 degrees left and right.
  3. If either STEER_A or STEER_B PID do not toggle between HIGH and LOW, Go To PINPOINT TEST F  .
  4. Take the vehicle for short test drive.
    1. Drive at speeds of at least 56 km/h (35 mph).
    2. While driving, compare the speedometer to the VSS_AS (or VSS_ARC) output on the diagnostic tool.
  5. If the VSS_AS (or VSS_ARC) PID reads within 8 km/h (5 mph) of the speedometer, the EVO inputs are OK; end the PID Test; GO to SYMPTOM CHART  .
  6. Repeat the test drive while monitoring the generic electronic module (GEM) PID VSS_GEM.
  7. If the VSS_GEM PID reads within 8 km/h (5 mph) of the speedometer, REPAIR circuit 679 (GY/BK).
  8. If the VSS_GEM PID reading is out of the above range, refer to TRANSFER CASE - GENERAL INFORMATION .
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