Diagnostic Aids
WARNING: This page is about a different car, the 2000 Isuzu VehiCROSS, 2000 Isuzu Trooper, 2000 Isuzu Rodeo, 2000 Isuzu Amigo, and 2000 Honda Passport. However, it is still accessible from the selected car via links, so may be relevant.
PCM is not monitoring an ABS fault signal. When PCM does not receive ABS signal, PCM will set DTC P1381. Check for an open circuit in wiring between PCM and ABS ECU.