Mazda CX-9 Grand Touring. Manual — part 122

DIAGNOSTIC PROCEDURE

DTC C1233, C1234, C1235, C1236 [DSC/RSC] DIAGNOSTIC PROCEDURE

DETECTION

CONDITION

abnormal acceleration that exceeds specification.



Periodic abnormality is detected in the signal wave pattern from the ABS
wheel-speed sensors.

POSSIBLE CAUSE



ABS wheel-speed sensor malfunction (low output, metal shavings on
sensor)



ABS sensor rotor malfunction (chipping of sensor rotor teeth)



Poor installation of ABS wheel-speed sensor and/or sensor rotor



Excessive clearance between the ABS wheel-speed sensor and sensor rotor

STEP

INSPECTION

ACTION

1

INSPECT PID FOR ABNORMAL
OUTPUT FROM ABS WHEEL-SPEED
SENSOR USING M-MDS



Turn the ignition switch off.



Connect the M-MDS to the DLC-2.



Select the following PIDs using the
M-MDS:

WSPD_LF

WSPD_LR

WSPD_RF

WSPD_RR



Start the engine and drive the vehicle.



Verify that the PIDs of the four ABS
wheel-speed sensors correspond
approximately.



Do the vehicle speeds correspond?

Yes Go to Step 4.

No

If there is a difference in speeds of the four

wheels, go to the next step.

INSPECT IF MALFUNCTION
OCCURRED DUE TO IMPROPER
SENSOR CLEARANCE.



Inspect the clearance between the
ABS wheel-speed sensor and the
ABS sensor rotor.

Yes Go to the next step.

2008 Mazda CX-9 Grand Touring

2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9

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2

(See FRONT ABS WHEEL-
SPEED SENSOR INSPECTION .)

(See REAR ABS WHEEL-SPEED
SENSOR INSPECTION [2WD] .)

(See REAR ABS WHEEL-SPEED
SENSOR INSPECTION [AWD] .)



Is the clearance normal?

Clearance

Front: 0.7-1.5 mm {0.028-0.059 in}

Rear (2WD): 0.3-1.1 mm {0.012-
0.043 in}

Rear (AWD): 0.95-1.75 mm {0.038-
0.068 in}

No

Replace the ABS wheel-speed sensor, then go to

Step 4.

(See FRONT ABS WHEEL-SPEED SENSOR

REMOVAL/INSTALLATION .)

(See REAR ABS WHEEL-SPEED SENSOR

REMOVAL/INSTALLATION [2WD] .)

(See REAR ABS WHEEL-SPEED SENSOR

REMOVAL/INSTALLATION [AWD] .)

3

VISUALLY INSPECT ABS SENSOR
ROTOR FOR FOREIGN MATERIAL
ADHERING OR IMPROPER
INSTALLATION



Is the result normal?

Yes Go to the next step.

No

Replace the front drive shaft, rear wheel hub

component (2WD) or rear drive shaft (AWD),

then go to the next step.

(See FRONT DRIVE SHAFT

REMOVAL/INSTALLATION .)

(See WHEEL HUB COMPONENT

REMOVAL/INSTALLATION [2WD] .)

(See REAR DRIVE SHAFT

REMOVAL/INSTALLATION .)

4

VERIFY THAT THE SAME DTC IS
NOT PRESENT



Clear the DTC from the memory.

(See ON-BOARD DIAGNOSTIC
[DSC/RSC].)



Start the engine and drive the vehicle
at 10 km/h {6.2 mph} or more.



Are the same DTCs present?

Yes

Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC/RSC
HU/CM, then go to the next step.
(See DSC/RSC HU/CM
REMOVAL/INSTALLATION .)

No

Go to the next step.

5

VERIFY THAT NO OTHER DTCS
ARE PRESENT



Are any other DTCs output?

Yes

Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC [DSC/RSC].)

No

DTC troubleshooting completed.

2008 Mazda CX-9 Grand Touring

2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9

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Sunday, November 15, 2009 9:50:13 AM

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DTC C1278, C1295, U2023 [DSC/RSC]

DTC C1278, C1295, U2023 [DSC/RSC] DETECTION CONDITION AND POSSIBLE CAUSE

DIAGNOSTIC PROCEDURE

DTC C1278, C1295, U2023 [DSC/RSC] DIAGNOSTIC PROCEDURE

DTC C1288 [DSC/RSC]

DTC C1288 [DSC/RSC] DETECTION CONDITION AND POSSIBLE CAUSE

DTC C1278, C1295, U2023 Steering angle sensor system

DETECTION CONDITION



C1278



The steering angle sensor detects an abnormality in the signal.



C1295, U2023



The steering angle sensor detects an internal abnormality.

POSSIBLE CAUSE



Steering angle sensor malfunction



Poor connection at connectors (female terminal)

STEP

INSPECTION

ACTION

1

INSPECT FOR BCM MALFUNCTION



Turn the ignition switch off.



Using the M-MDS, perform the DTC
inspection for the BCM.



Are any DTCs detected?

Yes

Go to applicable DTC inspection.
(See DTC TABLE [BCM] .)

No

Go to the next step.

2

VERIFY DTC TROUBLESHOOTING
COMPLETED



Clear the DTC from the memory.

(See ON-BOARD DIAGNOSTIC
[DSC/RSC].)



Are the same DTCs present?

Yes

Replace the DSC/RSC HU/CM, then go to the
next step.
(See DSC/RSC HU/CM
REMOVAL/INSTALLATION .)

No

Go to the next step.

3

VERIFY AFTER REPAIR PROCEDURE



Are any other DTCs present?

Yes

Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC
[DSC/RSC].)

No

DTC troubleshooting completed.

DTC C1288

Brake fluid pressure sensor system

DETECTION

CONDITION



The pressure from the brake fluid pressure sensor when the system starts
up is not within specification.



Open or short circuit in the brake fluid pressure sensor circuit in the

2008 Mazda CX-9 Grand Touring

2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9

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Sunday, November 15, 2009 9:50:13 AM

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC C1288 [DSC/RSC] DIAGNOSTIC PROCEDURE

DTC C1327 [DSC/RSC]

POSSIBLE CAUSE

DSC/RSC HU/CM



Malfunction in the brake fluid pressure sensor



Conventional brake system malfunction

STEP

INSPECTION

ACTION

1

INSPECT CONVENTIONAL BRAKE
SYSTEM



Inspect the conventional Drake system for
the following:



Normal master cylinder operation



Brake fluid leakage between the
master cylinder and DSC/RSC
HU/CM



Normal brake switch operation



Is the conventional brake system normal?

Yes Go to the next step.

No

Replace the malfunctioning part, then go to

the next step.

2

INSPECT BRAKE FLUID PRESSURE
SENSOR



Inspect the brake fluid pressure sensor.

(See BRAKE FLUID PRESSURE
SENSOR INSPECTION .)



Is the brake fluid pressure sensor normal?

Yes Go to the next step.

No

Replace the DSC/RSC HU/CM, then go to

the next step.

(See DSC/RSC HU/CM

REMOVAL/INSTALLATION .)

3

VERIFY NO ABNORMALITY ON BRAKE
FLUID PRESSURE SENSOR



Clear the DTCs from the memory.

(See ON-BOARD DIAGNOSTIC
[DSC/RSC].)



Are the same DTCs present?

Yes

Replace the DSC/RSC HU/CM, then go to
the next step.
(See DSC/RSC HU/CM
REMOVAL/INSTALLATION .)

No

Go to the next step.

4

VERIFY THAT NO OTHER DTCS ARE
PRESENT



Are any other DTCs output?

Yes

Go to the applicable DTC inspection.
(See ON-BOARD DIAGNOSTIC
[DSC/RSC].)

No

DTC troubleshooting completed.

2008 Mazda CX-9 Grand Touring

2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9

Microsoft

Sunday, November 15, 2009 9:50:13 AM

Page 32

© 2005 Mitchell Repair Information Company, LLC.