TEST 2: Making Sure The Ignition Coil Is Getting 12 Volts

Making Sure The Ingition Coil Is Getting Power. How To Test The Coil-On-Plug Ignition Coils (1996, 1997, 1998, 1999 3.2L Isuzu Amigo, Rodeo, Trooper, And Honda Passport)

OK, so far TEST 1 has confirmed that one or more of the ignition coils are not firing spark.

The next step is to verify that that ignition coil or coils (that did not spark) are receiving 10 to 12 Volts DC.

On the 1996-1997 vehicles, the wire that we're gonna' test is the wire that connects to the female terminal labeled with the number 1 in the photo above.

On the 1998-1999 vehicles, the wire that we're gonna' test is the wire that connects to the female terminal labeled with the number 2 in the photo above.

On all vehicles (1996-1999), this wire is the black with orange stripe (BLK/ORG) wire of the ignition coil's electrical connector.

We'll check for the presence of this voltage with a multimeter voltage test.

NOTE: Be careful when probing the front of the female terminal of the ignition coil's connector to avoid damaging it.

OK, let's get started:

  1. 1

    Disconnect the ignition coil from its electrical connector.

  2. 2

    Put the multimeter in VOLTS DC mode.

  3. 3

    Probe the BLK/ORG wire of the ignition coil's connector with the red multimeter test lead (using an appropriate tool).

    On the 1996-1997 vehicles, this wire connects to the female terminal labeled with the number 1.

    On the 1998-1999 vehicles, this wire connects to the female terminal labeled with the number 2.

  4. 4

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

  5. 5

    Have your helper turn the key to the ON position.

  6. 6

    You should see 10-12 Volts on your multimeter.

Let's take a look at what your test results mean:

CASE 1: The multimeter registered 10-12 Volts. This is the correct test result and lets you know that the ignition coil is getting power.

The next step is to make sure the ignition coil is getting Ground. Go to: TEST 3: Making Sure The Ignition Coil Is Getting Ground.

CASE 2: The multimeter DID NOT register 10-12 Volts. This tells you that the ignition coil is not getting power and without it, the ignition coil will not spark.

This test result eliminates the COP ignition coil itself as bad and as the source of the misfire condition.

Since the power circuit is shared by all of the COP ignition coils, the most likely cause of this missing voltage is a bad ignition coil connector or an open-circuit problem in the wire between the connector and the engine wiring harness.

TEST 3: Making Sure The Ignition Coil Is Getting Ground

Making Sure The Ingition Coil Is Getting Ground. How To Test The Coil-On-Plug Ignition Coils (1996, 1997, 1998, 1999 3.2L Isuzu Amigo, Rodeo, Trooper, And Honda Passport)

So far you have confirmed that the ignition coil that is not firing off spark is getting 10 to 12 Volts DC on the BLK/ORG wire.

The next step is to verify that that ignition coil is getting Ground.

On all vehicles (1996-1999), this wire is the black (BLK) wire and connects to the female terminal labeled with the number 3 of the ignition coil's electrical connector.

We'll check for the presence of this Ground by doing a multimeter voltage test.

NOTE: Be careful when probing the front of the female terminal of the ignition coil's connector to avoid damaging it.

These are the test steps:

  1. 1

    Disconnect the ignition coil from its electrical connector.

  2. 2

    Put the multimeter in VOLTS DC mode.

  3. 3

    Probe the BLK wire with the black multimeter test lead (using an appropriate tool).

    On all vehicles (1996-1999), this wire connects to the female terminal labeled with the number 3 in the photo above.

  4. 4

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

  5. 5

    Have your helper turn the key to the ON position.

  6. 6

    You should see 10-12 Volts on your multimeter

    If you're using a 12 Volt test light, the test light should light up.

Let's examine your test result:

CASE 1: The multimeter registered 10-12 Volts. This is the correct test result and confirms that the ignition coil is getting Ground.

The next step is to verify that the ignition coil is receiving a activation signal, go to: TEST 4: Testing For The Presence Of The Activation Signal.

CASE 2: The multimeter DID NOT register 10-12 Volts. This test results tells you that the ignition coil is not getting Ground and without it, the ignition coil will not spark.

This test result eliminates the COP ignition coil itself as bad and as the source of the misfire condition.

Since the Ground circuit is shared by all of the COP ignition coils, the most likely cause of this Ground is a bad ignition coil connector or an open-circuit problem in the wire between the connector and the engine wiring harness.