Circuit Description

WARNING: This page is about a different car, the 2000 Isuzu Hombre. However, it is still accessible from the selected car via links, so may be relevant.

Vehicle Control Module (VCM) performs an internal self-test on its Random Access Memory (RAM). DTC will be set if self-test fails.

Condition for setting DTC:

Ignition voltage is greater than 10 volts.
Ignition on for 5 seconds.
VCM is powered up.
VCM detects an internal microprocessor integrity fault, or internal RAM test fails.