LEMON Manuals: Even more car manuals for everyone
Home >> Hummer >> 2008 >> H3 Alpha >> Repair and Diagnosis >> External Pages >> Different car >> Section 573 (Immobilizer System) >> Diagnostic Information and Procedures >> DTC P1631 >> Circuit/System Description

Circuit/System Description

WARNING: This page is about a different car, the 2010 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The remote control door lock receiver (RCDLR) sends the fuel enable password to the engine control module (ECM) via the serial data circuit. If the fuel enable password received from the RCDLR equals the fuel enable password stored in the ECM, the ECM will allow vehicle starting.