TEST 6: Testing The Resistance Between Terminals B And C (APP Sensor 2)
In this test section, we're gonna' test the resistance between terminals B and C while we depress/release the accelerator pedal.
The expected test result is for the resistance to decrease/increase smoothly and without any gaps in the resistance reading as the pedal is depressed/released.
Terminal B is the terminal that outputs the APP sensor 2 signal to the fuel injection computer.
Terminal C is the terminal that receives 5 Volts DC from your Chevy Malibu or Pontiac G6's fuel injection computer.
NOTE: All multimeter connections are done on the male spade terminals of the APP sensor assembly itself.
These are the test steps:
- 1
Disconnect the APP sensor assembly from its electrical connector.
- 2
Place your multimeter in Ohms mode.
Connect the red multimeter test lead to terminal C.
Connect the black multimeter test lead to terminal B. - 3
At this point your multimeter should read about 2.4 K Ohms to 2.6 K Ohms.
- 4
Slowly depress the accelerator pedal till it bottoms out.
The resistance value should decrease to about 1.8 K Ohms to 2 K Ohms. - 5
Slowly release the accelerator pedal.
The resistance value should increase back to 2.4 K Ohms to 2.6 K Ohms (the value you observed in step 3).
Let's examine your test results:
CASE 1: The multimeter registered the indicated resistance values. This is the correct test result.
If APP sensor 2 has passed TEST 4, TEST 5, and TEST 6, then you can conclude that it is working correctly and not defective.
If APP sensor 1 and 2 passed all 6 tests, then you can conclude that the accelerator pedal position assembly is NOT defective.
CASE 2: The multimeter DID NOT register the indicated resistance values. This lets you know that APP sensor 2 is bad. Replace the accelerator pedal position (APP) sensor assembly.
More 3.5L V6 Chevy Malibu Tutorials
You can find a complete list of 3.5L V6 Chevy Malibu tutorials here: GM 3.5L V6 Index Of Articles.
Here's a list of articles you'll find there:
- How To Test The Engine Compression (2004-2007 3.5L Chevrolet Malibu).
- How To Do A Cylinder Balance Test (2004-2007 3.5L Malibu).
- How To Test A Blown Head Gasket (2004-2007 3.5L Malibu).
- How To Test The MAF Sensor (2004-2008 3.5L Malibu).
If this info saved the day, buy me a beer!
