Diagnostic Aids
Perform this test when directed by QUICK TEST. PCM uses adaptive fuel logic to compensate for normal variances in fuel system components. If fuel system appears to be too rich or too lean, adaptive fuel will make appropriate shift in fuel delivery calculations to compensate.
If possible, measure several known good MAP/BARO sensors. Average voltage reading will be typical for location and day of testing.
MAP SENSOR VOLTAGE OUTPUT
| Elevation (Feet) | Volts |
|---|---|
| 0 | 1.55-1.63 |
| 1000 | 1.52-1.60 |
| 2000 | 1.49-1.57 |
| 3000 | 1.46-1.54 |
| 4000 | 1.43-1.51 |
| 5000 | 1.40-1.48 |
| 6000 | 1.37-1.45 |
| 7000 | 1.35-1.43 |
CIRCUIT TEST HA ACRONYMS
| Acronym | Definition |
|---|---|
| HO2S | Heated Oxygen Sensor |
| KAM | Keep-Alive Memory |
| SFI | Sequential Multiport Fuel Injection |
1) Continuous Memory Codes 181, 183, 189 & 192 These codes identify a lean fuel condition resulting in adaptive fuel strategy enriching fuel system to compensate.