Mazda CX-9 Grand Touring. Manual — part 120

DTC C1115, C1185 [DSC/RSC]

DTC C1115, C1185 [DSC/RSC] DETECTION CONDITION AND POSSIBLE CAUSE

DIAGNOSTIC PROCEDURE

DTC C1115, C1185 [DSC/RSC] DIAGNOSTIC PROCEDURE

6

PROCEDURE



Are any other DTCs present?

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

No

DTC troubleshooting completed.

NOTE:



Perform the inspection of DTCs other than C1115 and C1185 first when
verifying DTCs.

DTC C1115, C1185

Valve relay system

DETECTION

CONDITION



C1115



Short circuit in the DSC/RSC HU/CM internal value relay.



C1185



Open circuit in the DSC/RSC HU/CM internal value relay.

POSSIBLE CAUSE



Open or short circuit in the DSC/RSC HU/CM internal valve relay, or
stuck valve relay

STEP

INSPECTION

ACTION

1

VERIFY DTC INSPECTION



Turn the ignition switch off.



Using the M-MDS, perform the
DTC inspection.



Are any DTCs other than C1115
and C1185 output?

Yes

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

No

Go to the next step.

2

VERIFY CURRENT STATUS OF
MALFUNCTION



Clear the DTC from the memory.

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



Is the same DTC 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 THAT NO DTCS ARE
OUTPUT AGAIN



Drive the vehicle at 32 km/h or

Yes If DTC C1115 or C1185 is output again, replace the

DSC/RSC HU/CM.
(See DSC/RSC HU/CM

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 C1145, C1155, C1165, C1175 [DSC/RSC]

DTC C1145, C1155, C1165, C1175 [DSC/RSC] DETECTION CONDITION AND POSSIBLE CAUSE

more.



Stop the vehicle and verify the
DTCs.



Are DTCs output again?

REMOVAL/INSTALLATION .)

No

DTC troubleshooting completed.

DTC C1145

RF ABS wheel-speed sensor (open circuit) system

DTC C1155

LF ABS wheel-speed sensor (open circuit) system

DTC C1165

RR ABS wheel-speed sensor (open circuit) system

DTC C1175

LR ABS wheel-speed sensor (open circuit) system

DETECTION

CONDITION



Open circuit has been detected in the ABS wheel-speed sensor or the ABS wheel-
speed sensor wiring harness on any of the four vehicle wheels.

POSSIBLE CAUSE



Open circuit in the wiring harness between the following DSC/RSC HU/CM
terminal and the ABS wheel-speed sensor terminal:



DSC/RSC HU/CM terminal AE-RF ABS wheel-speed sensor terminal A



DSC/RSC HU/CM terminal AB-RF ABS wheel-speed sensor terminal B



DSC/RSC HU/CM terminal AG-LF ABS wheel-speed sensor terminal A



DSC/RSC HU/CM terminal AD-LF ABS wheel-speed sensor terminal B



DSC/RSC HU/CM terminal G-RR ABS wheel-speed sensor terminal A



DSC/RSC HU/CM terminal J-RR ABS wheel-speed sensor terminal B



DSC/RSC HU/CM terminal F-LR ABS wheel-speed sensor terminal A



DSC/RSC HU/CM terminal I-LR ABS wheel-speed sensor terminal B



ABS wheel-speed sensor malfunction



Poor connection at connectors (female terminal)

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

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© 2005 Mitchell Repair Information Company, LLC.

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

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© 2005 Mitchell Repair Information Company, LLC.

DIAGNOSTIC PROCEDURE

DTC C1145, C1155, C1165, C1175 [DSC/RSC] DIAGNOSTIC PROCEDURE

STEP

INSPECTION

ACTION

1

INSPECT PID TO VERIFY THAT WHEEL
SPEED-SIGNALS ARE TRANSMITTED
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



Drive the vehicle.



Verify that the wheel speed-signals are
transmitted from each ABS wheel-speed
sensor.



Are the wheel-speed signals transmitted?

Yes Go to Step 4.

No

Go to the next step.

2

INSPECT FOR OPEN CIRCUIT IN WIRING
HARNESS BETWEEN DSC/RSC HU/CM
AND ABS WHEEL-SPEED SENSOR



Turn the ignition switch off.



Disconnect the DSC/RSC HU/CM
connector and ABS wheel-speed sensor.



Inspect for continuity in the wiring harness
between the following ABS wheel-speed
sensor connectors on the vehicle wiring
harness-side and DSC/RSC HU/CM
connectors.



RF ABS wheel-speed sensor: AE-A



RF ABS wheel-speed sensor: AB-B



LF ABS wheel-speed sensor: AG-A



LF ABS wheel-speed sensor: AD-B



RR ABS wheel-speed sensor: G-A

Yes Go to the next step.

No

Repair or replace the wiring harness, then

go to the next step.

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 24

© 2005 Mitchell Repair Information Company, LLC.