Mazda CX-9 Grand Touring 2009 Manual page 470

DIAGNOSTIC PROCEDURE
DTC B1317, B1318 DIAGNOSTIC PROCEDURE
STEP INSPECTION
INSPECT DSC/RSC HU/CM
POWER SUPPLY FOR OPEN
CIRCUIT
1
Start the engine.
Measure the voltage between
2008 Mazda CX-9 Grand Touring
2008 BRAKES On-Board Diagnostic (DSC/RSC) - Mazda CX-9
Battery deterioration
Generator malfunction
Poor connection at connectors (female terminal)
Yes Go to the next step.
No
ACTION
Repair or replace the wiring harness for open circuit
between the DSC/RSC HU/CM and ground, then go