Mazda 6. Manual — part 266

P–120

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)

NO.3 THERE IS A MALFUNCTION IN THE SYSTEM EVEN THOUGH ABS WARNING LIGHT, BRAKE SYSTEM
WARNING LIGHT, DSC INDICATOR LIGHT AND DSC OFF LIGHT DO NOT ILLUMINATE

A6E699067650W18

Diagnostic procedure

End Of Sie

NO.4 ABS OR TCS

OPERATES FREQUENTLY/TCS DOES NOT WORK CORRECTLY

: DSC SYSTEM

FUNCTION CONTAINS TRACTION CONTROL FUNCTION, DSC INDICATOR LIGHT GOES ON AND OFF
WHILE DSC OPERATES

A6E699067650W19

Diagnostic procedure

End Of Sie

There is a malfunction in the system even though ABS warning light, BRAKE system warning light,
DSC indicator light and DSC OFF light do not illuminate.

[TROUBLESHOOTING HINTS]

• There is mechanical malfunction in system.

STEP

INSPECTION

ACTION

CHECK DSC HU/CM FOR DTCs

• Check the DTC for the DSC ON-BOARD

DIAGNOSTIC SYSTEM.

• Have DTCs been recorded in memory?

Yes

Perform inspection using appropriate DTC.

Go to next step.

INSPECT DSC SYSTEM

• Perform DSC system inspection.

• Is the system okay?

Yes

Inspect conventional brake system.

Repair or replace malfunctioning part.

ABS or TCS (*1) operates frequently./TCS does not work correctly.
(*1): DSC system function contains traction control function, DSC indicator light goes on and off
while DSC operates.

[TROUBLESHOOTING HINTS]

• There is difference in size or air pressure between the front and rear tires.

• Incorrect ABS wheel-speed signal is inputted to DSC HU/CM.

• There is malfunction in the engine control system (TCS malfunction.)

STEP

INSPECTION

ACTION

CHECK FOR DTCS IN DSC HU/CM

• Check the DTC for the DSC ON-BOARD

DIAGNOSTIC SYSTEM.

• Have DTCs been recorded in memory?

Yes

Perform inspection using appropriate DTC.

Go to next step.

CHECK TIRE SIZE AND AIR PRESSURE

• Inspect tire size and air pressure.

• Are size and air pressure as specified?

Yes

Go to next step.

Replace with specified tires and adjust tire air pressure.

INSPECT ABS WHEEL-SPEED SENSOR
OUTPUT PULSE

• Start engine and drive vehicle.

• Inspect output voltage pattern using WDS or

equivalent (oscilloscope).

• Is output voltage pattern okay?

Yes

Found malfunctioning part according to “INTERMITTENT
CONCERN TROUBLESHOOTING”.

• ABS wheel-speed sensor installation inspection:

Inspect the sensor for looseness and confirm it is
securely adhered.

• Sensor rotor installation inspection:

Inspect the sensor rotor for poor installation and
chipping of sensor rotor teeth. (If sensor rotor is installed
poorly, it may cause output of abnormal wave form at
high speed.)

TROUBLESHOOTING (ABS/TCS/DYNAMIC STABILITY CONTROL)

P–121

NO.5 DSC

OPERATES FREQUENTLY/DSC DOES NOT WORK CORRECTLY

: DSC INDICATOR LIGHT

GOES ON AND OFF WHILE DSC OPERATES

A6E699067650W20

Diagnostic procedure

End Of Sie

NO.6 DSC INDICATOR LIGHT FLASHES (WHEN NEITHER THE TCS NOR THE DSC ARE OPERATING)

A6E699067650W021

End Of Sie

DSC (*2) operates frequently. /DSC does not work correctly.
(*2): DSC indicator light goes on and off while DSC operates.

[TROUBLESHOOTING HINTS]

• DSC HU/CM detected malfunction (input and output device malfunction)

• Poor installation with combine sensor and/or steering angle sensor

(If any of the above sensors are poorly installed, DSC may operate intermittently.)

• When replacing DSC HU/CM, combine sensor or steering angle sensor, initialization is not performed.

(If initialization is not performed correctly, DSC may not work correctly.)

STEP

INSPECTION

ACTION

CHECK DSC HU/CM FOR DTCs

• Check the DTC for the DSC ON-BOARD

DIAGNOSTIC SYSTEM.

• Have DTCs been recorded in memory?

Yes

Perform inspection using appropriate DTC.

Go to next step.

VERIFY THAT EACH SENSOR IS INSTALLED

• Are yaw rate sensor, lateral-G sensor and

steering angle sensor securely installed?

Yes

Go to next step.

Install malfunctioning sensor securely.

VERIFY THAT EACH SENSOR IS INITIALIZED

• Did each sensor initialize after replacement

of DTC unit, yaw rate sensor, lateral-G
sensor or steering angle sensor?

Yes

Find malfunctioning part according to “INTERMITTENT
CONCERN TROUBLESHOOTING.”

Perform initialization.

DSC indicator light flashes (when neither the TCS nor the DSC are operating)

[TROUBLESHOOTING HINTS]

• Non-completion of module configuration.

(If the module configuration is not carried out after replacing the DSC HU/CM, a DSC indicator light will flash. In
this case, the DSC is not detected.)

R–1

SUSPENSION

L OCATION INDEX . . . . . . . . . . . . . R-2

FRONT SUSPENSION LOCATION INDEX. . . R-2
REAR SUSPENSION LOCATION INDEX . . ... R-3

GENERAL PROCEDURES . . . . . . . . . R-4

PRECAUTION (SUSPENSION) . . . . . . ..R-4

WHEEL ALIGNMENT. . . . . . . . . . . .R-4

WHEEL ALIGNMENT PRE-INSPECTION. . ... R-4
FRONT WHEEL ALIGNMENT. . . . . . . . R-5
REAR WHEEL ALIGNMENT . . . . . . . ...R-6

WHEEL AND TIRE . . . . . . . . . . . . . R-7

WHEEL BALANCE ADJUSTMENT

(16 INCH AND 17 INCH
ALUMINUM ALL WHEEL) . . . . . . . . R-7

FRONT SUSPENSION . . . . . . . . . . ... R-9