P0125

DTC P0125 INSUFFICIENT COOLANT TEMPERATURE FOR CLOSED LOOP FUEL CONTROL

1. OUTLINE OF DIAGNOSIS
Detect the malfunction of engine coolant temperature output property.
Judge as NG when the engine coolant temperature does not rise in driving conditions where it should.

2. COMPONENT DESCRIPTION






3. ENABLE CONDITION









4. GENERAL DRIVING CYCLE
Perform the diagnosis only once after engine start.

5. DIAGNOSTIC METHOD

Abnormality Judgement
Judge as NG if the criteria below are met.






Timer for diagnosis after engine start

a. Timer stop at fuel cut
b. During the driving conditions except a) above, timer counts up as follows.
64 milliseconds + TWCNT milliseconds (the time of at 64 milliseconds) TWCNT is defined as follows,
TWCNT = 0 at idle switch ON,
TWCNT show on the following table at idle switch OFF.






Judgement value of timer after engine starting
t = 429523 ms - 28605 ms x Ti
Ti: The lowest coolant temperature after engine start
Time Needed for Diagnosis: Less than 1 second

Malfunction Indicator Light Illumination: Illuminates when malfunction occurs in 2 continuous driving cycles.

Normality Judgement
Judge as OK and clear the NG when the malfunction criteria below are met.






Time Needed for Diagnosis: Less than 1 second