Mazda MX-6 1998, Workshop Manual

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TROUBLESHOOTING
C1210
C1214
C1194
C1198
U IU C1246
C1254
C1242
C1250
Right front pressure reduction valve
Right front pressure retension valve
Left front pressure reduction valve
Left front pressure retension valve
Right rear pressure reduction valve
Right rear pressure retension valve
Left rear pressure reduction valve
Left rear pressure retension valve
DESCRIPTION Solenoid monitor signal does not track in response to solenoid to ON/OFF command
POSSIBLE
CAUSE
• Malfunction of solenoid valve
STEP
INSPECTION ACTION
— — —
Replace HU/CM component.
DTC C1266 Valve relay power supply
DESCRIPTION Three or more valve systems are detected to be faulty among eight systems
POSSIBLE
CAUSE
• Malfunction of valve relay
• Malfunction of related wiring harness
STEP INSPECTION
ACTION
1 Is ABS fuse (20 A) okay?
Yes Go to next step.
No Replace ABS fuse (20 A).
2
Is resistance between D and secure ground less
than 5 ii?
Yes Go to next step.
No Repair harness between D and ground point for open
circuit.
3
Is resistance between C of ABS CM harness
connector and secure ground less than 10 k£2?
Yes Repair harness between C and ABS fuse (20 A) for short
to ground.
No Go to next step.
4 Is resistance between C of ABS CM harness
connector and ABS fuse (20 A) less than 5 n ?
Yes Replace ABS CM.
No
Repair harness between C and ABS fuse (20 A) for open
circuit.
DTC C1117 Engine speed signal line
DESCRIPTION Torque reduction (engine condition) signal is normal and engine speed is less than specification
POSSIBLE
CAUSE
• Malfunction of engine control system
• Malfunction of related wiring harness
STEP
INSPECTION
ACTION
1
• Connect SST (NGS).
• Select PID/DATA MONITOR.
• Select ENG RPM.
With engine idling, is engine speed 400— 1500
rpm?
Yes Go to step 4.
No Go to next step.
2 With ABS/TCS CM connector disconnected and
engine idling, is duty ratio between AD (+) and D
(-) within specification?
Duty ratio: 20— 80%
Dwell meter reading: 18— 72° (4-cycle,
4-cylinder)
Yes Go to step 4.
No Go to next step.
3 With engine idling, is duty ratio between 48 (+)
and 91 (-) of PCM within specification?
Duty ratio: 20— 80%
Dwell meter reading: 18— 72° (4-cycle,
4-cylinder)
Yes There was temporarily poor contact in wiring harness or
connector.
Repair or replace as necessary.
No Replace PCM.
4 Is DTC present failure?
Yes Replace ABS/TCS CM.
No
There was temporarily poor contact in wiring harness or
connector.
Repair or replace as necessary.
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