Mazda 6 2002 Workshop Manual page 644

ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)
Diagnostic procedure
STEP
1 INSPECT ABS FUSE CONDITION
• Is ABS fuse (60 A) okay?
2 INSPECT FAIL-SAFE RELAY POWER
SUPPLY CIRCUIT FOR OPEN CIRCUIT
• Turn ignition key to OFF.
• Disconnect DSC HU/CM connector.
• Connect SST (adapter harness) to DSC HU/
CM connector (harness side only).
• Turn ignition key to ON (engine OFF).
• Measure voltage between DSC HU/CM
terminal C (harness side) of SST and
ground.
• Is voltage B+?
4 VERIFY FAIL-SAFE OPERATION
• Turn ignition key to OFF.
• Remove SST (adapter harness) and connect
all disconnected connectors.
• Connect WDS or equivalent to DLC-2.
• Turn ignition key to ON (engine OFF).
• Access ABS_POWER using WDS or
equivalent.
• Does fail-safe relay operate?
5 VERIFY TROUBLESHOOTING COMPLETED
• Clear DTC from memory.
See P–46 Clearing DTCs Procedures
• Is same DTC present?
6 VERIFY AFTER REPAIR PROCEDURE
• Is there any other DTC present?
DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254, C1400, C1410, C1957, C1958
End Of Sie
C 1210
C 1214
C 1194
C 1198
C 1246
C 1254
DTC
C 1242
C 1250
C 1400
C 1410
C 1957
C 1958
DETECTION
• Solenoid monitor signal does not track in response to solenoid ON/OFF command.
CONDITION
POSSIBLE
• Stuck solenoid valve in DSC HU/CM
CAUSE
Diagnostic procedure
STEP
1 VERIFY SOLENOID VALVE OPERATION
• Turn ignition key to OFF.
• Remove SST (adapter harness) and connect
all disconnected connectors.
• Connect WDS or equivalent to DLC-2.
• Turn ignition key to ON (engine OFF).
• Access solenoid valve(s) PIDs using WDS or
equivalent.
• Does solenoid valve operate?
INSPECTION
RF pressure reduction solenoid valve
RF pressure retention solenoid valve
LF pressure reduction solenoid valve
LF pressure retention solenoid valve
RR pressure reduction solenoid valve
RR pressure retention solenoid valve
LR pressure reduction solenoid valve
LR pressure reduction solenoid valve
RF traction switch solenoid valve
LF traction switch solenoid valve
RF DSC switch solenoid valve
LF DSC switch solenoid valve
INSPECTION
Yes Go to net step.
No Replace fuse, then go to Step 4.
Yes Go to net step.
No Repair or replace harness for open circuit between battery
positive terminal and DSC HU/CM terminal C, then go to
Step 4.
Yes Go to net step.
No Replace DSC HU/CM, then go to net step.
Yes Replace DSC HU/CM, then go to net step.
No Go to net step.
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
Yes Go to net step.
No Repair DSC HU/CM, then go to net step.
ACTION
A6E697367650W15
ACTION
P–87
P