Problem: This vehicle was towed in as a no-crank, no-start condition.
Case Details: The battery and starter were tested and checked out good. The technician attempted to retrieve codes, but the powertrain control module (PCM) would not communicate with the shop’s scan tool.
Courtesy of ALLDATA
Using a wiring diagram from ALLDATA Repair, the technician inspected all connections and found that ground, G103 was loose.
An ALLDATA Tech-Assist consultant recommended verifying the condition of all 12V power connections, grounds and network communication lines to the PCM. Using a wiring diagram from ALLDATA Repair, the technician inspected all connections and found that ground, G103 was loose.
Confirmed Repair: The tech cleaned the contact surfaces and then tightened the ground connection. After the repairs, normal communication, cranking, and starting resumed. Fixed!
Rich Diegle has been in the automotive industry since 1978. After graduating from a local community college, he began working at a Nissan dealership as a used car technician. Since then, he’s worked as a Nissan and ASE master automotive technician, shop owner, marketing copywriter, automotive editor, public relations manager, instructor, ALLDATA Tech-Assist team manager, and a senior automotive editor.
