How To Test The MAP Sensor (1997-2001 2.0L Honda CR-V)

TEST 2: Verifying MAP Sensor Has 5 Volts And Ground

In this last test section, we're gonna' make sure that the MAP sensor, on your 2.0L Honda CR-V, is getting power and Ground.

Power comes in the form of 5 Volts DC and is provided by the yellow with red stripe (YEL/RED) wire. This wire is identified by the number 1 in the photo above.

Ground is fed to the MAP sensor across the green with white stripe (GRN/WHT) wire. This wire is identified by the number 2 in the photo above.

To test both of these signals we're gonna' do a simple multimeter voltage test.

IMPORTANT: Be careful not to short-circuit the Ground wire to 12 Volts (battery power) or you will fry the fuel injection computer on your Honda CR-V. The multimeter voltage test indicated in the test steps below is one of the safest way to test this Ground.

These are the test steps:

1. 1

   Place your multimeter in Volts DC mode and turn the key on but don't crank or start your 2.0L Honda CR-V's engine.

2. 2

   Verify that the YEL/RED wire has voltage ( 4.5 to 5 Volts DC ) with the key on but engine off.
   
   Connect the red multimeter test lead (using the appropriate tool) to the YEL/RED wire. Connect the black multimeter test lead to the negative battery terminal.
   
   Your multimeter should read 4.5 to 5 Volts DC.

3. 3

   Verify that the GRN/WHT wire has Ground with the key on but engine off.
   
   Connect the black multimeter test lead (using the appropriate tool) to the GRN/WHT wire. Connect the red multimeter test lead to the positive battery terminal.
   
   Your multimeter should read 12 Volts DC.

These are what the test results mean:

CASE 1: The multimeter confirms that the MAP sensor is being fed power and Ground. This is the correct and expected test result.

You can now correctly conclude that the MAP sensor is bad if you confirmed that it is not producing the correct map signal when you apply vacuum do it (per the instructions in TEST 1).

CASE 2: Multimeter confirms that the MAP sensor IS NOT being fed power or Ground. This result lets you know that the MAP sensor is not working due to a lack of power or Ground.

This is usually the result of an open in the wiring between the MAP sensor connector and the fuel injection computer's connector. Although it's beyond the scope of this tutorial to verify these two wires, your next step is to check the continuity of these two wires and restore power and/or Ground to the MAP sensor.

More 2.0L Honda CR-V Tutorials

You can find a complete list of tutorials here: Honda 2.0L Index Of Articles.

Here's a sample of the tutorials you'll find there:

• How To Test The Ignition Coil (1999-2001 2.0L Honda CR-V).
• How To Test The Ignition Coil (1997-1998 2.0L Honda CR-V).
• How To Test The Ignition Control Module (1999-2001 2.0L Honda CR-V).
• How To Test The TPS (1997-2001 2.0L Honda CR-V).
• How To Test Engine Compression (1997-2001 2.0L Honda).

On YouTube, check out my following videos:

• How To Test The Ignition Coil (1999-2001 2.0L Honda CR-V) (at YouTube).
• How To Test The Ignition Control Module (1999, 2000, 2001 2.0L Honda CR-V) (at YouTube).
• How To Test The Fuel Pump (1997-2001 2.0L Honda CR-V) (at: YouTube).