Mazda 6 2002, Workshop Manual

Page: 659 / 1248

ON-BOARD DIAGNOSTIC (ABS/TCS)
P–63
P
Diagnostic procedure
End Of Sie
DTC C1194, C1198, C1210, C1214, C1242, C1246, C1250, C1254
A6E697567650W13
Diagnostic procedure
STEP INSPECTION ACTION
1 INSPECT ABS FUSE CONDITION
•
Is ABS fuse (60 A) okay?
Yes Go to next step.
No Replace fuse, then go to Step 4.
2 INSPECT FAIL-SAFE RELAY POWER
SUPPLY CIRCUIT FOR OPEN CIRCUIT
•
Turn ignition key to OFF.
•
Disconnect ABS (ABS/TCS) HU/CM
connector.
•
Connect SST (adapter harness) to ABS (ABS/
TCS) HU/CM connector (harness side only).
•
Turn ignition key to ON (engine OFF).
•
Measure voltage between ABS (ABS/TCS)
HU/CM terminal AA (harness side) of
SST
and ground.
•
Is voltage B+ ?
Yes Go to next step.
No Repair or replace harness for open circuit between battery
positive terminal and ABS (ABS/TCS) HU/CM terminal AA,
then go to Step 4.
3 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_VOLT using WDS or
equivalent.
•
Does fail-safe relay operate?
Yes Go to next step.
No Replace ABS (ABS/TCS) HU/CM, then go to next step.
4 VERIFY TROUBLESHOOTING COMPLETED
•
Clear DTC from memory.
(See
P–46 Clearing DTCs Procedures )
•
Is same DTC present?
Yes Replace DSC HU/CM, then go to next step.
No Go to next step.
5 VERIFY AFTER REPAIR PROCEDURE
•
Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.
DTC
C 1210
C 1214
C 1194
C 1198
C 1246
C 1254
C 1242
C 1250 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
DETECTION
CONDITION
•
Solenoid monitor signal does not track in response to solenoid ON/OFF command.
POSSIBLE
CAUSE
•
Open, short to power, or short to ground circuit in ABS (ABS/TCS) HU/CM
•
Stuck solenoid valve in ABS (ABS/TCS) HU/CM
STEP INSPECTION ACTION
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?
Yes Go to next step.
No Repair ABS (ABS/TCS) HU/CM, then go to next step.
2 VERIFY TROUBLESHOOTING COMPLETED
•
Clear DTC from memory.
(See
P–46 Clearing DTCs Procedures )
•
Start engine and drive vehicle at 10 km/h
{6.2 mph} or above.
•
Gradually slow down and stop vehicle.
•
Is same DTC present?
Yes Replace ABS (ABS/TCS) HU/CM, then go to next step.
No Go to next step.
3 VERIFY AFTER REPAIR PROCEDURE
•
Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.