Mazda 6 2002, Workshop Manual

Page: 692 / 1248

P–96
ON-BOARD DIAGNOSTIC (DYNAMIC STABILITY CONTROL)
DTC U2021
A6E697367650W22
Note
•
To warm up the engine completely, idle the engine and wait for more than 5 minutes .
Diagnostic procedure
End Of Sie
DTC U2021 Engine coolant temperature
DETECTION
CONDITION
•
After engine is warmed up, engine coolant temperature is 0
°
C {32
°
F} or less, and TCS operation is
inhibited by PCM.
POSSIBLE
CAUSE
•
System is normal. When engine coolant temperature rises, TCS operation is executed by PCM.
STEP INSPECTION ACTION
1 CHECK WHETHER ENGINE HAS WARMED
UP
•
Has engine warmed up?
Yes Go to next step.
No Warm up the engine.
If DSC OFF light goes out, system is normal.
2 VERIFY THAT MALFUNCTION SYMPTOM
OCCURS AFTER ENGINE IS WARMED UP
•
Warm up the engine.
•
Is DSC indicator light also illuminated and
DTC C1119 obtained?
Yes Go to DTC C1119 chart.
No If DSC OFF light goes out, system is normal.
If DSC OFF light does not go out, go to next step.
3 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.
4 VERIFY AFTER REPAIR PROCEDURE
•
Is there any other DTC present?
Yes Go to applicable DTC inspection.
No Troubleshooting completed.