Dtc C1140 - Mazda 6 2002 Workshop Manual

ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)

DTC C1140

DTC C1140
DETECTION
Right front and left rear wheels, or left front and right rear wheel-lock is detected during DSC operation.
CONDITION
POSSIBLE
Stuck pump motor in DSC HU/CM
CAUSE
Diagnostic procedure
STEP
1 INSPECT DSC HU/CM OPERATION
• Perform DSC HU/CM system inspection.
(See P–35 DSC SYSTEM
• Is it okay?
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.
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?
4 VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
(See P–46 Clearing DTCs
• 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?
5 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
DTC C1145, C1155, C1165, C1175
End Of Sie
Caution
• • • • When attaching the tester lead to the DSC HU/CM connector the SST (49 G066 004) must be used.
C1145
C1155
DTC
C1165
C1175
DETECTION
• Abnormal input is detected.
CONDITION
• Open or short to ground circuit in harness between DSC HU/CM terminal and wheel-speed sensor(s)
terminal below
— DSC HU/CM terminal M—RF wheel-speed sensor terminal A
— DSC HU/CM terminal I—RF wheel-speed sensor terminal B
— DSC HU/CM terminal F—LF wheel-speed sensor terminal A
POSSIBLE
— DSC HU/CM terminal J—LF wheel-speed sensor terminal B
CAUSE
— DSC HU/CM terminal K—RR wheel-speed sensor terminal A
— DSC HU/CM terminal H—RR wheel-speed sensor terminal B
— DSC HU/CM terminal Q—LR wheel-speed sensor terminal A
— DSC HU/CM terminal N—LR wheel-speed sensor terminal B
• Malfunction of wheel-speed sensor(s)
DSC HU/CM (pump)
INSPECTION
INSPECTION)
Procedures)
RF wheel-speed sensor
LF wheel-speed sensor
RR wheel-speed sensor
LR wheel-speed sensor
Yes Go to net step.
No Replace DSC HU/CM, then go to Step 4.
Yes Inspect conventional brake line, then go to Step 4.
No Go to net step.
Yes Repair parking brake system, then go to net step.
No Go to net step.
Yes Replace DSC HU/CM, then go to net step.
No Go to net step.
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
A6E697367650W11
ACTION
A6E697367650W12
P–81
P