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Home >> Cadillac >> 2008 >> STS V >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (Computer/Integrating Systems) >> Diagnostic Information and Procedures >> DTC B1440 >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2006 Cadillac STS. However, it is still accessible from the selected car via links, so may be relevant.

The instrument panel module (IPM) is the power mode master and the remote control door lock receiver (RCDLR) is the backup power mode master. Both modules receive information regarding ignition mode switch position from the ignition mode switch. The ignition mode switch will be monitored only with battery voltage at or above 7 volts to prevent invalid input readings during low voltages encountered during vehicle cranking.

Four modes are discernible: