Mazda CX-7 2007 Workshop Manual page 806

2007 mazda cx-7
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STEP
2
INSPECT FOR OPEN CIRCUIT IN WIRING
HARNESS BETWEEN DSC HU/CM AND ABS
WHEEL-SPEED SENSOR
• Turn the ignition switch off.
• Disconnect the DSC 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 HU/CM connectors.
— RF ABS wheel-speed sensor: M— A
— RF ABS wheel-speed sensor: O— B
— LF ABS wheel-speed sensor: F— A
— LF ABS wheel-speed sensor: E— B
— RR ABS wheel-speed sensor: I— A
— RR ABS wheel-speed sensor: L— B
— LR ABS wheel-speed sensor: G— A
— LR ABS wheel-speed sensor: H— B
• Is there continuity?
3
VERIFY THAT THE SAME DTC IS NOT
PRESENT
• Clear the DTCs from the memory.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
• Start the engine and drive the vehicle at 10
km/h {6.2 mph} or more.
• Are the same DTCs present?
4
VERIFY THAT NO OTHER DTCS ARE
PRESENT
• Are any other DTCs output?
End Of Sie
DTC C1279, C1280, C1281, C1282, C1951, C1952, C1959, C2768
C1279, C1280, C1281, C1282, C1951,
DTC
C1952, C1959, C2768
• C1279
— The yaw rate value from the combined sensor (yaw rate part) exceeds specification while the vehicle
is stopped or while accelerating from a standstill.
• C1280
— The difference between the yaw rate value calculated by each sensor and the yaw rate value from
the combined sensor (yaw rate part) exceeds specification.
• C1281
— The difference between the lateral-G value calculated by each sensor and the lateral-G value from
the combined sensor (lateral-G part) exceeds specification.
• C1282
DETECTION
— Specified signal pattern from combined sensor has not output after the ignition switch is turned to the
CONDITION
ON position.
• C1951
— The monitor voltage from the combined sensor (lateral-G part) is not within specification.
• C1952
— The monitor voltage from the combined sensor (yaw rate part) is not within specification.
• C1959
— The lateral-G value from the combined sensor (lateral-G part) exceeds specification.
• C2768
— There is an abnormality in the signal from the combined sensor (yaw rate part).
04-02–24
ON-BOARD DIAGNOSTIC
INSPECTION
Combined sensor system
Yes
Replace the ABS wheel-speed sensor, then go to the next
step.
(See 04-15-11 FRONT ABS WHEEL-SPEED SENSOR
REMOVAL/INSTALLATION.)
(See 04-15-13 REAR ABS WHEEL-SPEED SENSOR
REMOVAL/INSTALLATION[2WD].)
(See 04-15-13 REAR ABS WHEEL-SPEED SENSOR
REMOVAL/INSTALLATION[AWD].)
No
Repair or replace the wiring harness, then go to the next
step.
Yes
Repeat the inspection from Step 1.
If the malfunction recurs, replace the DSC HU/CM, then go
to the next step.
(See 04-15-6 DSC HU/CM REMOVAL/INSTALLATION.)
No
Go to the next step.
Yes
Go to the applicable DTC inspection.
(See 04-02-3 ON-BOARD DIAGNOSIS.)
No
DTC troubleshooting completed.
ACTION
id040200801700

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