Diagnostic Reference Values

Diagnostic Reference Value Sheet:

Notes

1. Diagnostic Reference Values are based on engine at normal operating temperature (80°-104°C [176°-220°F] /ECT= 1.5 to.5v).
2. KOEO and Hot Idle test measurements are taken with the vehicle in the PARK position.
3. Reference values shown in chart may differ substantially between vehicles due to various factors: component tolerance, driving conditions, weather, etc. The values recorded on these sheets were obtained at approximately 600' altitude above sea level and ambient temperatures from 10° to 21°C (50° to 70°F).

NOTE: Reference values shown may vary approximately +/- 2O% depending on operating conditions and other factors.

$ AC SW is ON with A/C ON.

$$ ACR is ON with engine running and A/C ON.

*VST is ON when starting the engine, then it goes OFF when the engine runs.

** Self-learning control air/fuel mixture ratio. It is an automatic compensation for the difference between the basic and theoretical air/fuel mixture ratio, computed in term of fuel injection duration. The value is memorized in the PCM memory.

*** Air/fuel ratio correction. If A/F COR is less than 100%, the PCM is compensating for a rich signal from the HO2S. If the A/F COR is greater than 100%, the PCM is compensating for a lean signal from the HO2S.

@ OFF when the steering wheel is in neutral, ON when it is turned.

& ON when ECT is between 95°C (203°F) and 99°C (210°F) with A/C OFF, or when ECT is between 100°C (212°F) and 104°C (219°F) with A/C OFF and VSS at 19 KPH (12 MPH) or less or when ECT is between 100°C (212°F) and 104°C (219°F) with A/C ON.

&& ON when ECT is between 100° (212°F) and 104°C (219°F) with A/C OFF and VSS at 20 KPH (12 MPH) or more. Or, when ECT is 105°C (221°F) or more.