Poor electrical connections at the module's grounding points can lead to unstable voltage, triggering an internal fault code. Troubleshooting and Repair Steps
Use a professional-grade OBD2 scanner (such as an Autel MaxiSys or the official Isuzu diagnostic tool) to clear the code. If the code is "Not Present" and does not return after a drive cycle, it was likely triggered by a one-time low-voltage event. isuzu isuzu -thailand- error b101d30
Visually examine the wiring harness and connectors leading to the SRS module (usually located under the center console) and the BCM. Look for bent pins, corrosion, or loose connections. Poor electrical connections at the module's grounding points
An open or shorted circuit in the wiring harness that powers the control module can cause it to report a hardware fault. Visually examine the wiring harness and connectors leading
This is the most common "ghost" cause. A severely discharged or dead battery can cause the BCM or SRS module to experience a logic error during a low-voltage start attempt.