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HOMESERVICE MANUALSMAZDA20066 S, 4D SEDAN, STANDARDREPAIR AND DIAGNOSIS (SINGLE PAGE)BRAKESTRACTION CONTROLON-BOARD DIAGNOSTIC [DYNAMIC STABILITY CONTROL)DTC C1140 [DSC]DIAGNOSTIC PROCEDURE
2006 Mazda 6 s, 4D Sedan, Standard

Diagnostic procedure

2006 Mazda 6 s, 4D Sedan, StandardSECTION Diagnostic procedure
DTC C1140 [DSC] DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT DSC HU/CM OPERATION 
 Yes Go to next step.
No Replace DSC HU/CM, then go to Step 4.
2 INSPECT CONVENTIONAL BRAKE OPERATION 
  • Inspect brake fluid level.
  • Start engine.
  • Perform a road test to verify conventional vehicle braking performance.
  • Is there any concern.
 Yes Inspect conventional brake line, then go to Step 4.
No Go to next step.
3 INSPECT REAR BRAKE DRAGGING 
  • Turn ignition key to OFF.
  • Jack-up vehicle and support it with safety stand.
  • Release parking brake.
  • Turn rear wheel by hand and inspect for rear brake drag.
  • Is rear brake dragging?
 Yes Repair parking brake system, then go to next step.
No Go to next step.
4 VERIFY TROUBLESHOOTING COMPLETED 
  • Clear DTC from memory.

    (See CLEARING DTCS PROCEDURES ).

  • Start engine and drive vehicle at 10 km/h {6.2 mph}  or above at least one minute.
  • Gradually slow down vehicle and stop.
  • Is the same DTC present?
 Yes Replace DSC HU/CM, then go to next step.
No Go to next step.
5 VERIFY THAT NO OTHER DTCS ARE PRESENT 
  • Are any other DTCs output?
 Yes Go to the applicable DTC inspection.
(See DTC TABLE ).
No DTC troubleshooting completed.
RENDER: 1.0x

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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.