TEST 2: APP Sensor 1 Resistance Tests (2 Of 2)
In this test section, you'll test the resistance across terminals 2 and 4 while depressing and then releasing the accelerator pedal.
If all is OK, you should see:
- The resistance decreases as you depress the accelerator pedal.
- The resistance increases as you release the accelerator pedal.
NOTE: The easiest way to connect your multimeter's test leads to the male terminals of APP sensor 1 is with jumper wires with alligator clips on both ends.
These are the test steps:
- 1
Disconnect the APP sensor assembly from its electrical connector.
- 2
Place your multimeter in Ohms mode.
- 3
Connect one multimeter test lead to terminal 2.
- 4
Connect the other multimeter test lead to terminal 4.
- 5
Note the Ohms reading on your multimeter.
At this point you'll see a resistance reading somewhere around 2k to 3K Ohms.
If you don't, don't worry. Continue on to the next step. - 6
Slowly depress the pedal by hand till it bottoms out.
- 7
The resistance value should decrease as you depress the pedal.
- 8
Slowly release the accelerator pedal.
- 9
The resistance value should increase back to the original value you saw in step 5.
Let's examine your test results:
CASE 1: The resistance increased/decreased without any gaps. This is the correct test result.
The next step is to test APP sensor 2. Go to: TEST 3: APP Sensor 2 Resistance Tests (1 Of 2).
CASE 2: The resistance DID NOT decrease. This lets you know that APP sensor 1 is bad.
Replace the accelerator pedal assembly.
CASE 3: The resistance DID NOT increase. This lets you know that APP sensor 1 is bad.
Replace the accelerator pedal assembly.
CASE 4: The resistance DID NOT decrease/increase. This lets you know that APP sensor 1 is bad.
Replace the accelerator pedal assembly.
TEST 3: APP Sensor 2 Resistance Tests (1 Of 2)
Now that you've tested and confirmed that APP sensor 1 is OK, it's time to perform the first of the two APP sensor 2 tests.
Specifically, you'll test across terminals 1 and 5 for an open-circuit or a short-circuit problem. If you find no problems, your next step will be TEST 4.
Let's get started:
- 1
Disconnect the APP sensor assembly from its electrical connector.
- 2
Place your multimeter in Ohms mode.
- 3
Connect one multimeter test lead to terminal 1.
- 4
Connect the other test lead to terminal 5.
- 5
Your multimeter should read continuity.
You'll usually see an Ohms reading somewhere between 2K to 3K Ohms.
Let's examine your test results:
CASE 1: The multimeter registered continuity between terminals 1 and 5. This is the correct test result.
Your next step is to test the resistance of APP sensor 2 while depressing/releasing the accelerator pedal. For this test go to: TEST 4: APP Sensor 2 Resistance Tests (2 Of 2).
CASE 2: The multimeter registered 0 Ohms (or a value very close to it). This test result confirms a short-circuit problem between terminals 1 and 5.
With this test result, you can conclude that the accelerator pedal assembly is defective and needs replacement.
CASE 3: The multimeter reports no continuity (the letters OL are displayed). This test result confirms an open-circuit problem between terminals 1 and 5.
With this test result, you can conclude that the accelerator pedal assembly is defective and needs replacement.
