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Home >> Fiat >> 2016 >> 500 Turbo, Standard Trans >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 9 ((Antilock Brake System (Abs) - Electrical Diagnostics - 500 - Electric)) >> DTC Troubleshooting >> U0420-00-Invalid Data Received From Power Steering Control Module >> Diagnostic Test

Diagnostic Test

WARNING: This page is about a different variant/trim than selected.
  1. VERIFY THE DTC IS ACTIVE 
    1. Turn the ignition on.
    2. With the scan tool, read the DTCs.

      Is the DTC active at this time?

      Yes 

      • Go To  2

      No 

      • The condition that caused this code to set is not present at this time. Check for an intermittent condition by inspecting the related wiring harness for chafed, pierced, pinched, and partially broken wires. Also inspect the related connectors for broken, bent, pushed out, spread, corroded, or contaminated terminals.
      • Perform the BODY VERIFICATION TEST. Refer to BODY VERIFICATION TEST .
  2. DTCS STORED OR ACTIVE IN THE EPS 
    1. With the scan tool, read EPS DTCs.

      Are any DTCs active or stored in the EPS?

      Yes 

      No 

      • Go To  3
  3. INITIALIZE EPS MODULE 
    1. With the scan tool, under "Miscellaneous Functions" run the EPS Learn routine.
    2. Cycle the ignition off to on.
    3. With the scan tool, erase the DTCs.
    4. Cycle the ignition off to on.
    5. Wait ten seconds.
    6. With the scan tool, read the DTCs.

      Does the DTC remain active?

      Yes 

      • Using the schematics as a guide, check the Anti-lock Brake System (ABS) Module pins, terminals, and connectors for corrosion, damage, or terminal push out. Pay particular attention to all power and ground circuits. If no problems are found, replace the Anti-lock Brake Module in accordance with the Service Information. Refer to MODULE, ANTI-LOCK BRAKE SYSTEM, REMOVAL .
      • Perform the ABS VERIFICATION TEST. Refer to ABS VERIFICATION TEST  .

      No 

      • Test complete.