after having heater core replaced.
Sep 9, 2019 at 1:57 PM
OBD does not communicate with car
2003 VOLKSWAGEN PASSAT
ROBINDDOHERTY
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My guess is that a wire was disconnected or ground was left off or damaged. What I need you to do is check for power to pins 15 and 16. They should have power all the time. Pin 1 should have power when the key is in the run position (engine can be off). Next, and this is my first suspect, check continuity to ground to pins 4 and 5.
I attached a pic of the DLC below so you can see what I am referring to . Also, make sure there are no blown fuses. (fuses 5 and 37) fuse panel under the left side of the dash.
Here are a few links you may find helpful:
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-wiring
Let me know if this helps or if you have other questions.
Take care,
Joe
My guess is that a wire was disconnected or ground was left off or damaged. What I need you to do is check for power to pins 15 and 16. They should have power all the time. Pin 1 should have power when the key is in the run position (engine can be off). Next, and this is my first suspect, check continuity to ground to pins 4 and 5.
I attached a pic of the DLC below so you can see what I am referring to . Also, make sure there are no blown fuses. (fuses 5 and 37) fuse panel under the left side of the dash.
Here are a few links you may find helpful:
https://www.2carpros.com/articles/how-a-car-fuse-works
https://www.2carpros.com/articles/how-to-check-a-car-fuse
https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester
https://www.2carpros.com/articles/how-to-use-a-voltmeter
https://www.2carpros.com/articles/how-to-check-wiring
Let me know if this helps or if you have other questions.
Take care,
Joe
Image (Click to enlarge)
Sep 9, 2019 at 7:26 PM
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