Mazda 6 2002, Workshop Manual

Page: 677 / 1248

ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)
P–81
P
DTC C1140
A6E697367650W11
Diagnostic procedure
End Of Sie DTC C1145, C1155, C1165, C1175
A6E697367650W12
Caution
•
When attaching the tester lead to the DSC HU/CM connector the SST (49 G066 004) must be used.
DTC C1140 DSC HU/CM (pump)
DETECTION
CONDITION
Right front and left rear wheels, or left front and right rear wheel-lock is detected during DSC operation.
POSSIBLE
CAUSE
Stuck pump motor in DSC HU/CM
STEP INSPECTION ACTION
1 INSPECT DSC HU/CM OPERATION
•
Perform DSC HU/CM system inspection.
(See
P–35 DSC SYSTEM INSPECTION )
•
Is it okay?
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
P–46 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 DSC HU/CM, then go to next step.
No Go to next step.
5 VERIFY AFTER REPAIR PROCEDURE
•
Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
DTC
C1145
C1155
C1165
C1175 RF wheel-speed sensor
LF wheel-speed sensor
RR wheel-speed sensor
LR wheel-speed sensor
DETECTION
CONDITION
•
Abnormal input is detected.
POSSIBLE
CAUSE
•
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
— DSC HU/CM terminal J—LF wheel-speed sensor terminal B
— 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)