• | Perform the Diagnostic System Check - Vehicle prior to using this diagnostic procedure. |
• | Review Strategy Based Diagnosis for an overview of the diagnostic approach. |
• | Diagnostic Procedure Instructions provides an overview of each diagnostic category. |
Circuit | Short to Ground | Open/High Resistance | Short to Voltage | Signal Performance |
---|---|---|---|---|
Left Front Strut Position Sensor Low Reference Circuit | -- | C0615 08 | -- | -- |
Left Front Strut Position Sensor 5 Volt Voltage Reference Circuit | C0696 | C0615 08 | C0696 | -- |
Left Front Strut Position Sensor Signal Circuit | C0615 08 | C0615 08 | C0615 08 | C0615 55 |
Right Front Strut Position Sensor Low Reference Circuit | -- | C0620 08 | -- | -- |
Right Front Strut Position Sensor 5 Volt Voltage Reference Circuit | C0696 | C0620 08 | C0696 | -- |
Right Front Strut Position Sensor Signal Circuit | C0620 08 | C0620 08 | C0620 08 | C0620 55 |
Left Rear Strut Position Sensor Low Reference Circuit | -- | C0625 08 | -- | -- |
Left Rear Strut Position Sensor 5 Volt Voltage Reference Circuit | C0696 | C0625 08 | C0696 | -- |
Left Rear Strut Position Sensor Signal Circuit | C0625 08 | C0625 08 | C0625 08 | C0625 55 |
Right Rear Strut Position Sensor Low Reference Circuit | -- | C0630 08 | -- | -- |
Right Rear Strut Position Sensor 5 Volt Voltage Reference Circuit | C0696 | C0630 08 | C0696 | -- |
Right Rear Strut Position Sensor Signal Circuit | C0630 08 | C0630 08 | C0630 08 | C0630 55 |
The electronic suspension control (ESC) module provides a common regulated reference voltage of approximately 5 volts to all of the position sensors. The ESC module monitors this power supply for a malfunction that could prevent it from correctly regulating the supply voltage.
• | Battery voltage is between 9-16 volts |
• | Ignition is ON |
• | The ESC module senses suspension position sensor supply voltage under 4.75 volts or over 5.25 volts. |
• | The condition is detected for 1 second in 4 consecutive ignition cycles. |
• | Commands speed dependent damping system and normal force signals to the default state. |
• | The ESC sends a message to the instrument panel cluster (IPC) to display SERVICE SUSPENSION SYSTEM message. |
• | A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present. |
• | The ESC module senses the correct sensor supply voltage. |
• | The IPC clearing DTC feature. |
Electronic Suspension Control Schematics
Electronic Suspension Control Description and Operation
Control Module References for Scan Tool Information
Ignition ON, observe the scan tool Position Sensor Data parameters. The readings should vary between 0.35-4.75 volts while the vehicle is jounced.
⇒ | If less than the specified range, test the 5 volt reference circuit for a short to ground or an open/high resistance. If all circuits test normal, replace the ESC module. |
⇒ | If greater than the specified range, test the 5 volt reference circuit for a short to voltage. If the circuit tests normal, replace the ESC module. |
⇒ | If the voltage is out of the range when one of the 3 sensors are connected, test or replace the suspect suspension position sensor. |
⇒ | If not within the specified range or if it is erratic, replace the applicable suspension position sensor. |
• | Control Module References for ESC module replacement, setup, and programming |