SureTrack Real Fix: No Communication

Real Fixes from ShopKey’s SureTrack® expert information resource are documented issues from actual shop repair orders and community discussions. Read on to see how SureTrack can help you correct issues that are not easily diagnosed using OEM information alone. SureTrack is currently available free with the purchase of a current Snap-on® diagnostic software version or in our ShopKey Pro product.


Being able to communicate is an essential part of being a human being, but it’s also an essential part of working on modern vehicles. Follow this Real Fix to see how various codes related to communication on this Buick Park Avenue were diagnosed and the repair that followed.

Vehicle
1999 Buick Park Avenue 3.8L

Title
B1159, C1298, P1602, P1610, U1255, Replaced Body Control Module

Complaint
The customer states the check engine light is on.

Cause
Connected a scan tool and found codes: B1159 – Loss Of Serial Data; C1298 – PCM Indicated Class 2 Serial Data Link Malfunction; P1602 – Loss Of EBTCM Serial Data; P1610 – Standard Body Module Serial Data Circuit and U1255 – Generic Loss Of Class 2 Data. Attempted to communicate with all of the modules on the vehicle’s data bus network using the scan tool and found the body control module did not communicate. Disconnected the body control module connector, visually inspected the connector and terminals and found no obvious signs of damage. Used a multi-meter to check for the presence of voltage and ground at the body control module and found both were present. Used the multi-meter to check for the presence of a short or open in the body control module communication circuit and found there were no shorts or opens present. These test results verified the body control module was faulty.

Correction
Replaced the body control module, cleared codes, performed a road test and verified the vehicle operated properly.


SureTrack® adds to the power of ShopKey Pro with an exclusive combination of expert knowledge and detailed parts replacement records, all wrapped in an interactive community. Designed to help automotive shops increase accuracy and efficiency from diagnosis to completed repair, the industry’s most comprehensive repair information resource is just a few clicks away.

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About the Author

Nick Taylor

Nick Taylor is the SureTrack Community Administrator and a Senior Applications Specialist at Mitchell 1 with over 25 years of experience with electronic repair data systems. Nick previously worked in the automotive dismantling and engine rebuilding industries.