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Home >> Ford >> 2012 >> Mustang Base, 2D Coupe, Automatic Trans >> Repair and Diagnosis >> External Pages >> Different car >> Section 438 (Vehicle Dynamic Suspension) >> Diagnosis And Testing >> Vehicle Dynamic Suspension >> Diagnostic Routines >> Pinpoint Test C: Cannot Change Suspension Modes Using the Ride Control Switch >> Normal Operation and Fault Conditions

Normal Operation and Fault Conditions

WARNING: This page is about a different car, the 2013 Ford Mustang. However, it is still accessible from the selected car via links, so may be relevant.

When the ride control switch is pressed, a signal is sent to the PCM. The PCM interprets this signal and sends a message to the IPC over the HS-CAN. When the IPC receives this message, it sends a ride control mode change request message to the VDM over the HS-CAN. The VDM then adjusts the PWM voltage sent to the solenoids to adjust the suspension to the requested setting. A short to ground, voltage or an open in the ride control switch circuits between the PCM and the switch causes the switch to not function. A communication error between any of the 3 modules causes suspension mode change request concerns and also causes the VDM to set DTCs.

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