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B3623



DTC B3623

Circuit Description

The body control module (BCM) monitors the adaptive cruise control (ACC) gap adjustment switch signal circuit to determine the driver selected headway. The gap switch is a momentary contact switch that connects a series of resistors. Each switch state, inactive, up and down, corresponds to a specific resistance value. The BCM determines the switch selection by the voltage drop across the resistor. The BCM sets DTC B3623 when it detects a stuck gap up/down switch.

DTC Descriptor

This diagnostic procedure supports the following DTC:

DTC B3623 Steering Wheel Controls Adaptive Cruise Control (ACC) Gap Up/Down Signal Circuit.






Conditions for Running the DTC

Ignition is in RUN.

Conditions for Setting the DTC

Gap adjustment switch signal circuit remains in the same state for 1 minute

Action Taken When the DTC Sets

Gap +/- switch remains in the last selected position

Conditions for Clearing the MIL/DTC

* The DTC becomes history when the fault is no longer present.
* A History DTC clears after 100 malfunction free ignition cycles.
* The BCM module receives a clear code command from the scan tool.

Diagnostic Aids

Refer to Testing for Intermittent Conditions and Poor Connections in Diagnostic Aids. Component Tests and General Diagnostics


Test

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