• | 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 5-Volt Reference | C0696 00 | C0615 08 | C0696 00 | -- |
Left Front Strut Position Sensor Signal | C0615 08 | C0615 08 | C0615 08, C0696 00 | C0615 55 |
Left Front Strut Position Sensor Low Reference | -- | C0615 08 | -- | -- |
Right Front Strut Position Sensor 5-Volt Reference | C0696 00 | C0620 08 | C0696 00 | -- |
Right Front Strut Position Sensor Signal | C0620 08 | C0620 08 | C0620 08, C0696 00 | C0620 55 |
Right Front Strut Position Sensor Low Reference | -- | C0620 08 | -- | -- |
Left Rear Strut Position Sensor 5-Volt Reference | C0696 00 | C0625 08 | C0696 00 | -- |
Left Rear Strut Position Sensor Signal | C0625 08 | C0625 08 | C0625 08, C0696 00 | C0625 55 |
Left Rear Strut Position Sensor Low Reference | -- | C0625 08 | -- | -- |
Right Rear Strut Position Sensor 5-Volt Reference | C0696 00 | C0630 08 | C0696 00 | -- |
Right Rear Strut Position Sensor Signal | C0630 08 | C0630 08 | C0630 08, C0696 00 | C0630 55 |
Right Rear Strut Position Sensor Low Reference | -- | C0630 08 | -- | -- |
The electronic suspension control (ESC) module supplies a 5-volt reference signal to each suspension position sensor. The suspension position sensors supply a signal of 0.35-4.75 volts to the ESC module which represents the position between the body and the wheel. The sensors are also grounded through the ESC module.
• | Battery voltage is between 9-16 volts. |
• | Ignition is ON. |
• | The DTC is set when the ESC module measures a position sensor signal less than 0.35 volt or greater than 4.75 volts for more than 1 second while the vehicle is operated under normal driving conditions. |
• | The fault is detected during 3 consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with a scan tool. |
• | The ESC will enter the speed dependent damping mode. |
• | Both left and right normal force outputs will be set to the default output states. |
• | The ESC sends a message to the instrument panel cluster (IPC) to display SERVICE SUSPENSION SYSTEM message. |
A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.
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 while the vehicle is jounced. The readings should vary between 0.35-4.75 volts.
Important: Whenever repairing and/or replacing ALC system components, perform the Suspension Position Calibration procedure.
⇒ | If greater than the specified range, test the low reference circuit for an open/high resistance. If circuit tests normal, replace the ESC module. |
⇒ | If less than the specified range, test the 5-volt reference circuit for a short to ground or an open/high resistance. If the circuit tests 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 greater than the specified range, test the signal circuit terminal B for a short to voltage. If the circuit tests normal, replace the ESC module. |
⇒ | If less than the specified range, test the signal circuit for a short to ground or an open high resistance. If all circuits test normal replace the ESC module. |
⇒ | If not within the specified range or if it is erratic, replace the suspension position sensor. |
• | Control Module References for ESCM replacement, setup, and programming |