What should DC signal be on Silverado MAP sensor?

Reconnect the Silverado MAP Sensor harness and the wire you will need to read is the one that’s connected to PIN B. This wire is your signal wire, and you’ll be using the hand pump to deliver vacuum to the MAP sensor inlet. With the key turned to the “ON” position you should see between 4.5-4.8 volts of DC signal at this wire.

What should the voltage be on the MAP sensor?

Turn the Key on but don’t start the engine. This will power up the MAP sensor and you should see a reading of 4.7 Volts DC on your multimeter. Now, apply vacuum to the MAP sensor with the vacuum pump (or your mouth). The voltage signal value should decrease.

What does the Check Engine light on a MAP sensor mean?

Sometimes, a malfunction in the MAP sensor or its circuit will trigger the check engine light (CEL). Scanning the computer, you may find a P010X series of codes stored in memory. Here is a brief description of these codes: P0105: MAP sensor circuit malfunction.

How to test the MAP sensor in a Chevy Cobalt?

Remove the MAP sensor from the intake manifold. Connect your vacuum pump to the MAP sensor’s vacuum inlet port. Reconnect the MAP sensor to its connector if you disconnected it. Set your multimeter’s selector to Volts DC mode and with the red test lead, probe the LT GRN wire of the MAP sensor’s connector.

How to test the voltage of the MAP sensor?

NOTE: The MAP sensor must remain connected to its electrical connector to test the MAP signal voltage. Ground the black multimeter test lead on the battery negative (-) terminal. Have your helper turn the key On but don’t start the engine. You should see a voltage around 4.5 Volts DC registering on your multimeter.

Reconnect the Silverado MAP Sensor harness and the wire you will need to read is the one that’s connected to PIN B. This wire is your signal wire, and you’ll be using the hand pump to deliver vacuum to the MAP sensor inlet. With the key turned to the “ON” position you should see between 4.5-4.8 volts of DC signal at this wire.

How to test the MAP sensor ( 1999-2006 V8 Chevy )?

The manifold absolute pressure (MAP) sensor, on the 1999-2006 V8 Chevrolet Silverado (Suburban, Tahoe) and GMC Sierra (Yukon, Yukon XL) can be easily tested with a simple multimeter. In this tutorial I’ll explain how to do it in a step-by-step way.

Sometimes, a malfunction in the MAP sensor or its circuit will trigger the check engine light (CEL). Scanning the computer, you may find a P010X series of codes stored in memory. Here is a brief description of these codes: P0105: MAP sensor circuit malfunction.