OBD11 fails to communicate

BOB STODDARD

MEMBER
2000 FORD EXCURSION
6.8L
V10
4WD
AUTOMATIC
160,000 MILES

Turn the key theft light does not turn on for three seconds, the fuel pump does not turn on and prime, try to start. The starter does turn the engine over but it does not start.I have replaced the the key pickup sensor in the steering column.

Sunday, October 7th, 2018 AT 3:15 PM

6 Replies

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

HI and thanks for using 2CarPros. Com.

First, determine if there is power and ground to the data link connector (DLC). Pin 4 is ground, so check for continuity, and pin 16 is power, so check for 12 volts. I attached a picture to help you identify the pins.

Let me know what you find.

Joe

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Sunday, October 7th, 2018 AT 7:49 PM

BOB STODDARD

MEMBER
3 POSTS

Thanks, I work long hours. I will try to get back to you before the weekend.

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Monday, October 8th, 2018 AT 1:26 PM

JACOBANDNICKOLAS

MECHANIC
109,747 POSTS

No problem. I will watch for your reply. Have a good week.

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Monday, October 8th, 2018 AT 4:27 PM

BOB STODDARD

MEMBER
3 POSTS

Hi J&N answer to Q. #4 is ground, is working .Q. #16 is power, is working at 12.75v

Bob

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Saturday, October 13th, 2018 AT 2:19 PM

BOB STODDARD

MEMBER
3 POSTS

Hi Joe, yes ground on #4 and yes we have power hot on #16. Bob

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Wednesday, October 17th, 2018 AT 6:57 AM

KEN L

MASTER CERTIFIED MECHANIC
47,602 POSTS

Let's check the main PCM relay. Here is a guide to help you test it and the location of the relay under the hood with the engine wiring diagrams so you can see how the system works:

https://www.2carpros.com/articles/how-to-check-an-electrical-relay-and-wiring-control-circuit

Check out the diagrams (below). Please let us know what you find.

Cheers, Ken

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