Mazda CX-7 2007 Workshop Manual page 795

Diagnostic procedure
STEP
1 INSPECT ABS FUSE CONDITION
• Is the ABS 1 40A fuse normal?
2 INSPECT MOTOR RELAY POWER SUPPLY
FOR OPEN CIRCUIT
• Turn the ignition switch off.
• Disconnect DSC HU/CM connector.
• Turn the ignition switch to the ON position
(engine off).
• Measure voltage between DSC HU/CM
terminal B (harness-side) and ground.
• Is the voltage B+?
3 INSPECT PUMP MOTOR GROUND FOR
OPEN CIRCUIT
• Turn the ignition switch off.
• Inspect for continuity between DSC HU/CM
terminal A (harness-side) and ground.
• Is there continuity?
4 VERIFY PUMP MOTOR OPERATION
• Turn the ignition switch off.
• Connect the M-MDS to the DLC-2.
• Turn the ignition switch to the ON position
(engine off).
• Access PMP_MOTOR active command
modes using the M-MDS.
• Does the pump motor operate?
5 VERIFY TROUBLESHOOTING COMPLETED
• Make sure to reconnect all disconnected
connectors.
• Clear the DTC 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.
• Gradually slow down and stop the vehicle.
• Is the same DTC present?
6 VERIFY AFTER REPAIR PROCEDURE
• Are any other DTCs present?
End Of Sie
ON-BOARD DIAGNOSTIC
INSPECTION
Yes Go to the next step.
No Replace the fuse, then go to Step 5.
Yes Go to the next step.
No Repair or replace the wiring harness for open circuit
between battery positive terminal and DSC HU/CM terminal
B, then go to Step 5.
Yes Go to the next step.
No Repair or replace the wiring harness for open circuit
between DSC HU/CM terminal A and ground, then go to
Step 5.
Yes Go to the next step.
No Replace the DSC HU/CM, then go to the next step.
(See 04-15-6 DSC HU/CM REMOVAL/INSTALLATION.)
Yes 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
04-02–13
04-02