CASE 885B AWD Fault Simulation Training Manual PDF | EST Diagnostic Procedures & Pressure Sensor Tests (Copy)

Technical Highlights

• Applicable model: CASE 885B AWD Motor Grader

• Training focus: AWD diagnostic logic, fault generation & validation

• Tools required: CASE Electronic Service Tool (EST) / AIC Interface

• Primary fault scenario:

  • Disconnect reverse-pressure sensor → code 5431 (Yellow, Active)

  • Disconnect forward-pressure sensor → new fault registered after Refresh

• Error codes:

  • 5160 – General AWD system fault (requires EST for analysis)

  • 5431 – Pump-pressure sensor error (Creep Mode disabled)

• Procedure overview:

  1. Disconnect reverse-pressure sensor at pump

  2. Retrieve controller faults in EST

  3. Identify code 5431 (Yellow – Active)

  4. Check for RED + ACTIVE faults

  5. Clear all faults via EST and AIC

  6. Only the ACTIVE fault remains

  7. Verify Creep Mode inoperative if code 5431 persists

  8. Disconnect forward-pressure sensor → simulate second fault

  9. Press Refresh in EST to detect new fault

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