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Home >> Ford >> 2009 >> Escape Base, 2.5 7, FWD, Standard >> Repair and Diagnosis >> Brakes >> Traction Control >> Anti-Lock Brake System - Vehicle Dynamic Systems >> Diagnosis And Testing >> Anti-Lock Control - Non-Hybrid >> Pinpoint Tests >> Pinpoint Test H: Traction Control Cannot Be Disabled >> Normal Operation

Normal Operation

When the stability/traction control switch is pressed, a ground circuit is momentarily completed. The ABS module detects this ground signal and disables the traction control system. The system is enabled when the switch is pressed a second time or if the ignition switch is cycled.

Circuit CCA15 (YE/GY) connects the ABS module to the stability/traction control switch. The stability/traction control switch is grounded along circuit GD114 (BK/BU). When the switch is pressed, the 2 circuits are momentarily connected and the ABS module receives a ground signal. The ABS module sends a message to the instrument cluster over the High Speed Controller Area Network (HS-CAN) bus to illuminate the stability/traction control indicator. The ABS module will send a message over the HS-CAN bus to the PCM indicating that the wheel-spin will be allowed.

This pinpoint test is intended to diagnose the following: 

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