secretcas.blogg.se - Buick lesabre mass air flow sensor problems

Regardless, the following procedure will help you replace the sensor.

Otherwise, if the voltage rises to 5 volts, then there is a problem in the wire between the computer and sensor.

If you still get a low voltage at the computer side, then you need to check the computer.

You may need to measure this voltage on the same wire but at the computer side.

If your voltage is lower, visually inspect the connector and wire between the sensor and the PCM for damage.

The readout should show 5 volts or close to it.

Set your multimeter to about 10V on the direct current (DCV) scale.īackprobe the reference wire at the connector.This will allow the computer to supply a reference voltage to the MAP sensor. Turn the ignition key to the On position but don't start the engine.You need to identify the signal, reference, and ground wires using your vehicle repair manual. The MAP sensor uses a three-wire connector. Compare your readings to specifications listed in your vehicle repair manual.