SYS.OK|MANUAL.DBâ—Ź LIVE
HOMESERVICE MANUALSFORD2018EXPEDITION MAX LIMITED, 4WDREPAIR AND DIAGNOSISBRAKESBRAKES CONTROL SYSTEMSABS GUIDED ROUTINE TESTINGPINPOINT TESTSPINPOINT TESTS AN: STABILITY CONTROL SENSOR INITIALIZATION FAULTPOSSIBLE CAUSES
2018 Ford Expedition MAX Limited, 4WD

Possible Causes

2018 Ford Expedition MAX Limited, 4WDSECTION Possible Causes
  • IVD initialization not carried out
  • RCM concern
  • ABS module
  1. AN1: CARRY OUT THE IVD INITIALIZATION 
    NOTE: The vehicle must be on level ground and at a complete standstill during IVD Initialization. Any vehicle movement results in a failed calibration.
    • Using a diagnostic scan tool, carry out the IVD Initialization routine, Follow the diagnostic scan tool instructions.
    • Does the sensor calibration routine pass successfully? 
      Yes No
      Go to  AN13. Go to  AN2.
  2. AN2: VERIFY BATTERY STATE OF CHARGE 
    • Using a multi-meter or similar tool, verify the battery voltage is greater than 10 volts.
    • Is the battery voltage greater than 10 volts? 
      Yes No
      Go to  AN6. DIAGNOSE the battery low voltage condition. Refer to Charging System article.
  3. AN3: CHECK THE PRIVATE HS-CAN FOR A SHORT TO GROUND 
    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
    • Ignition OFF.
    • Wait one minute.
    • ABS Module connector disconnected. (C135)
    • RCM_A connector disconnected. (C310A)
    • RCM_B connector disconnected. (C310B)
    • Measure the resistance between:
      (+) RCM_B (C310B) Connector, Harness Side (-)
      CAN- Ground
      CAN+ Ground
    • Is the resistance greater than 10, 000 ohms? 
      Yes No
      Go to  AN4. REPAIR the circuit.
  4. AN4: CHECK THE PRIVATE HS-CAN FOR AN OPEN 
    • Measure the resistance between:
      (+) RCM_B (C310B) Connector, Harness Side (-) ABS Module (C135) Connector, Harness Side
      CAN- CAN-
      CAN+ CAN+
    • Is the resistance less than 3 ohms? 
      Yes No
      Go to  AN5. REPAIR the circuit.
  5. AN5: CHECK THE PRIVATE HS-CAN FOR A SHORT TOGETHER 
    • Measure the resistance between:
      (+) RCM_B (C310B) Connector, Harness Side (-) RCM_B (C310B) Connector, Harness Side
      CAN- CAN+
    • Is the resistance greater than 10, 000 ohms? 
      Yes No
      Go to  AN6. REPAIR the circuit.
  6. AN6: CHECK THE RCM MOUNTING SURFACE AND ELECTRICAL GROUNDING 
    WARNING: Turn the ignition OFF and wait one minute to deplete the backup power supply. Failure to follow this instruction may result in serious personal injury or death in the event of an accidental deployment.
RENDER: 1.0x

NO RELATED

Recommended Tools & Savings

Use the Manual With the Right Hardware

Pair factory procedures with proven DIY tools so the instructions are easier to execute.

Affiliate disclosure: We may earn a commission at no extra cost to you.

Shop Manual-Ready ToolsFree Quote CheckQuote Shield Pro

When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.