Q: What is a TJ, YJ, or CJ? A: A quick rundown: A TJ is a Wrangler with a model year of 1997+ and has round headlights and a coil suspension. A YJ is a Wrangler from 1987 to 1995 (there was no 1996 model, just...
The diagnostic trouble codes on all models can be extracted from the Powertrain Control Module (PCM) using a SCAN tool. On 1991 through 1995 models only, the PCM can be placed in the diagnostic mode and the...