Diagnostic Aids

WARNING: This page is about a different car, the 1995 Pontiac Trans Sport, 1995 Oldsmobile Silhouette, and 1995 Chevrolet Lumina APV. However, it is still accessible from the selected car via links, so may be relevant.

Check vehicle wiring harness for open or short in serial data circuit. Check for poor connections, damaged connectors or wiring harness. Observe ABS data on scan tool while moving harness and related connectors. If failure is induced, scan tool will stop updating. This may help isolate malfunction.

Fig 1: Code 1573 Schematic (3.8L FWD Van) Traction Control Loss Of ABS/TCS Serial Data

Fig 2: Code 1573 Flow Chart (3.8L FWD Van) Traction Control Loss Of ABS/TCS Serial Data