How To Test The TPS (1995-1997 2.7L Honda Accord)

TEST 2: Making Sure The TPS Has 5 Volts

In this test section, we're gonna' make sure that the throttle position sensor is getting 5 Volts.

These 5 Volts are provided by your 2.7L V6 Honda Accord's fuel injection computer and are delivered to the TPS by the yellow with blue stripe (YEL/BLU) wire of the TPS 3-wire connector.

In the photo above, I've labeled the YEL/BLU wire with the number 3.

These are the test steps:

1. 1

   Place your multimeter in Volts DC mode.

2. 2

   Disconnect the TPS from its electrical connector.

3. 3

   Turn the key the ON position but don't start the engine.

4. 4

   Connect the red multimeter test lead (using the appropriate tool) to the YEL/BLU wire.

5. 5

   Connect the black multimeter test lead to the negative (-) battery terminal.

6. 6

   Your multimeter should read 4.5 to 5 Volts DC.

Let's analyze your test results:

CASE 1: The YEL/BLU wire is feeding the TPS with 5 Volts. This is the correct test result.

Now that you have confirmed that your 2.7L Honda Accord's TPS is getting 5 Volts, the next step is to make sure it's getting Ground. Go to: TEST 3: Making Sure The TPS Has Ground.

CASE 2: The YEL/BLU wire IS NOT feeding the TPS with 5 Volts. Without these 5 Volts the TPS, on your 2.7L Honda Accord, will not function.

The most likely cause of these missing 5 Volts is an open-circuit problem in the YEL/BLU wire between the TPS sensor's connector and the fuel injection computer's connector.

TEST 3: Making Sure The TPS Has Ground

So far your test results have confirmed 2 important things:

• The TPS is not producing a voltage signal that increases/decreases as you open/close the throttle plate (TEST 1).
• The TPS is getting 5 Volts on the YEL/BLU wire (TEST 2).

For our last test we're gonna' make sure that it's getting Ground from the fuel injection computer.

The wire that supplies Ground to the TPS is the green with blue stripe (GRN/BLU) wire of the sensor's 3-wire connector.

NOTE: Ground is provided by the fuel injection computer of your 2.7L Honda Accord. Be careful and don't connect this wire to battery 12 Volts or you'll fry the fuel injection computer. The multimeter voltage test I'm suggesting below is a safe way to test for the presence of Ground in the wire.

Let's get started:

1. 1

   Place your multimeter in Volts DC mode.

2. 2

   Disconnect the TPS from its electrical connector.

3. 3

   Turn the key the ON position but don't start the engine.

4. 4

   Connect the black multimeter test lead (using the appropriate tool) to the GRN/BLU wire.

5. 5

   Connect the red multimeter test lead to the positive (+) battery terminal.

6. 6

   Your multimeter should read 10 to 12 Volts DC.

Let's analyze your test results:

CASE 1: The GRN/BLU wire is feeding Ground to the TPS. This is the correct test result.

You can correctly conclude that the TPS is defective if you have:

• Confirmed that the TPS voltage signal does not increase/decrease as you opened/closed the throttle plate (TEST 1).
• Confirmed that the TPS is getting 5 Volts (TEST 2).
• Confirmed, in this test section, that the TPS is getting Ground.

CASE 2: The GRN/BLU wire IS NOT feeding Ground to the TPS. Without Ground the TPS will not function.

The most likely cause of this missing Ground is an open-circuit problem in the GRN/BU wire between the throttle position sensor's connector and the fuel injection computer's connector.

More 2.7L V6 Honda Accord Tutorials

You can find a complete list of 2.7L V6 Honda tutorials in this index:

• Honda 2.7L Index of Articles.

Here's a small sample of the tutorials you'll find in the index:

• How To Test Engine Compression (1995-1997 2.7L Honda Accord).
• How To Test The Head Gaskets (1995-1997 2.7L Honda Accord).
• P0420 -What Does It Mean? (1996-1997 2.7L Honda Accord).
• How To Test The Ignition System (1995-1997 2.7L Honda Accord).