General description
6. MAP sensor (see illustration) monitors changes in manifold pressure that are associated with changes in load and engine speed, and converts this information into an output voltage. The ECM uses the MAP sensor to control fuel delivery and ignition timing.
4.6. MAP Sensor Assembly Parts for 3.1L Engine
7. A failure in the KLAR sensor circuit should result in the setting of code 33 or code 34.
Examination
8. MAP sensor test procedures are given in the attached diagnostic chart (see block diagram).
4.8a. Diagnostic card for MAP output test
4.8b. Apply vacuum to the MAP sensor and read the voltage value. Install the positive lead on the signal wire (terminal "IN"), and the negative one "mass" (terminal "A"). The voltage must decrease
| Height | Voltage range | |
| meters | feet | Volts |
| Below 305 | Below 1000 | 3,8-5,5 |
| 305-610 | 1000-2000 | 3,6-5,3 |
| 610-914 | 2000-3000 | 3,5-5,1 |
| 914-1219 | 3000-4000 | 3,3-5,0 |
| 1219-1524 | 4000-5000 | 3,2-4,8 |
| 1524-1829 | 5000-6000 | 3,0-4,6 |
| 1829-2133 | 6000-7000 | 2,9-4,5 |
| 2133-2438 | 7000-8000 | 2,8-4,3 |
| 2438-2743 | 8000-9000 | 2,6-4,2 |
| 2743-3048 | 9000-10000 | 2,5-4,0 |
| Low Altitude = High Pressure = High Voltage | ||