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Home >> Mazda >> 2023 >> MX-5 Miata Club >> Repair and Diagnosis >> Accessories & Equipment >> Drivers Assistance Systems - ADAS >> On-Board Diagnostic - Adaptive Front Lighting System (AFS) Control Module >> DTC U0452-4A: SAS Control Module Serial Number Mismatch [Forward Sensing Camera (FSC)] >> Diagnostic Procedure

Diagnostic Procedure

DTC U0452:4A (FORWARD SENSING CAMERA) DIAGNOSTIC PROCEDURE

Step Inspection Action
1 VERIFY IF SAS CONTROL MODULE WAS REPLACED 
  • Verify if the SAS control module was replaced.
  • Was the SAS control module replaced?
 Yes Go to the next step.
No Go to Step 3.
2 VERIFY IF MALFUNCTIONING LOCATION IS SAS CONTROL MODULE DEPENDING ON REPEATABILITY 
  • Park the vehicle on level ground, and then switch the ignition ON (engine off or on) and wait 5 s or more with the vehicle in an unloaded condition.
  • Switch the ignition ON (engine on) and move the vehicle forward a few meters.
  • After switching the ignition off, switch the ignition ON (engine off or on) again.
  • Clear the DTC for the forward sensing camera (FSC) using the M-MDS. (See CLEARING DTC: [FORWARD SENSING CAMERA (FSC)] .)
  • Switch the ignition ON (engine off or on) and wait for 1.5 s or more.
  • Retrieve the forward sensing camera (FSC) DTCs using the M-MDS. (See DTC INSPECTION: [FORWARD SENSING CAMERA (FSC)] .)
  • Is the same Pending DTC present?
 Yes Go to the next step.
No Go to Step 6.
3 VERIFY SAS CONTROL MODULE DTCs 
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE [SAS CONTROL MODULE (TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.)] .)
No Go to the next step.
4 VERIFY IF MALFUNCTIONING LOCATION IS SAS CONTROL MODULE DEPENDING ON REPEATABILITY 
 Yes Replace the SAS control module, then go to the next step.
(See SAS CONTROL MODULE REMOVAL/INSTALLATION [TWO-STEP DEPLOYMENT CONTROL SYSTEM - US/CANADA SPEC.] .)
No Go to Step 6.
5 VERIFY THAT REPAIRS HAVE BEEN COMPLETED 
 Yes Replace the forward sensing camera (FSC), then go to the next step.
(See FORWARD SENSING CAMERA (FSC) REMOVAL/INSTALLATION .)
No Go to the next step.
6 VERIFY IF OTHER DTCs DISPLAYED 
  • Are any other DTCs displayed?
 Yes Repair or replace the malfunctioning part according to the applicable DTC troubleshooting.
(See DTC TABLE: [FORWARD SENSING CAMERA (FSC)] .)
No DTC troubleshooting completed.
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