Mazda CX-7 2007 Workshop Manual page 798

Diagnostic procedure
STEP
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?
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
04-02–16
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to Step 3.
No Go to the next step.
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