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Diagnostic procedure

WARNING: This page is about a different car, the 2005 Mazda 6. However, it is still accessible from the selected car via links, so may be relevant.
DTC C1140 DIAGNOSTIC PROCEDURE

STEP INSPECTION ACTION
1 INSPECT ABS/TCS HU/CM OPERATION 
 Yes Go to the next step.
No Replace ABS/TCS 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 the next step.
3 INSPECT REAR BRAKE DRAGGING 
  • Turn the ignition switch 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 the next step.
No Go to the next step.
4 VERIFY TROUBLESHOOTING COMPLETED 
  • Clear the DTC from the 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 same DTC present?
 Yes Replace ABS/TCS HU/CM, then go to the next step.
No Go to the next step.
5 VERIFY AFTER REPAIR PROCEDURE 
  • Is there any other DTC present?
 Yes Go to the applicable DTC inspection.
No Troubleshooting completed.
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