Suspension Control System - Real Time Damping Control Chevrolet Corvette C6

Fastener Tightening Specifications

Scheme 1

Scheme 2

DIAGNOSTIC CODE INDEX

DIAGNOSTIC CODE INDEX

Diagnostic Starting Point - Electronic Suspension Control

Begin the system diagnosis with Diagnostic System Check - Vehicle . The Diagnostic System Check will provide the following information

1. The identification of the control modules which command the system.
2. The ability of the control modules to communicate through the serial data circuit.
3. The identification of any stored diagnostic trouble codes (DTCs) and their status.

The use of the Diagnostic System Check will identify the correct procedure for diagnosing the system and where the procedure is located.

Diagnostic Instructions

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Circuit/System Description

The electronic suspension control module(ESCM) performs checks of internal calibration data. If a fault condition is detected, the ESCM will set the fault DTC, and may, depending upon the fault type, turn ON the SERVICE RIDE CONTROL message. Recovery from any controller fault condition is attempted only after the ignition is cycled ON and OFF.

Conditions for Running the DTC

1. Battery voltage is between 9-16 volts
2. Ignition is ON.

Conditions for Setting the DTC

1. The DTC is set when any calibration faults internal to the ESCM are detected.
2. The fault is detected during 3 consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with the scan tool.

Action Taken When the DTC Sets

1. The ESCM disables all system functionality.
2. The ESCM sends a message to the instrument panel cluster (IPC) to display the SERVICE RIDE CONTROL message.

Conditions for Clearing the DTC

1. A current DTC will clear when the ESCM no longer senses the malfunction and the ignition is cycled ON and OFF.
2. The DTC will remain in history until 50 ignition cycles have occurred.

Reference Information

Schematic Reference

Electronic Suspension Control Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Circuit/System Verification

Verify that DTC C0558 is not set.

1. If the DTC resets replace the ESCM.

Repair Procedures

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

Control Module References for electronic suspension control module replacement, programming and setup.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

Diagnostic Fault Information

The electronic suspension control module (ESCM) commands variable levels of pulse width modulated current to each damper in response to rough road, or abrupt steering maneuver driving conditions. The ESC module continuously compares each dampers command state with the state of their feedback circuits to ensure they agree.

1. Battery voltage is between 9-16 volts
2. Ignition ON for 30 seconds

1. The damper coil or the circuits to the coil are shorted to ground, shorted to voltage, or open for 3 consecutive ignition ON cycles.
2. The vehicle must be driven over 4.8 km/h (3 mph).

1. The driver information center (DIC) displays the SERVICE RIDE CONTROL message.
2. If the DTC symptom 01 is stored, the electronic suspension control (ESC) system is disabled.
3. If the DTC symptom 02 or 04 is stored, the suspect damper is disabled.

1. A current DTC will clear on the next consecutive malfunction-free ignition cycle.
2. A history DTC will clear after 50 consecutive malfunction-free ignition cycles.

Schematic Reference

Electronic Suspension Control Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, command the damper actuator ON and OFF while jouncing the vehicle in the front and rear. Suspension should change stiffness when commanded between the ON and OFF state.

Circuit/System Testing

1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
2. Perform this setup step in the following order: Connect a test lamp between the damper connector control circuit terminal A and control circuit terminal B. Ignition ON, with a scan tool, clear all ESC module DTCs.
3. Command the damper ON and OFF with a scan tool. The test lamp should turn ON and OFF when changing between the commanded states. If the test lamp is always ON, test the control circuit terminal A for a short to voltage. If the circuit tests normal, replace the ESC module. If the test lamp is always OFF, test the control circuits listed below. If all circuits test normal, replace the ESC module. Control circuit terminal A for a short to ground or open/high resistance. Control circuit terminal B for an open/high resistance or short to voltage.
4. If all circuits test normal, test or replace the suspension damper.

Component Testing

1. Ignition OFF, disconnect the harness connector at the appropriate suspension damper.
2. Test for .7-3.3ohms between the control circuit terminal A and the control circuit terminal B of the suspension damper. If not within the specified range, replace the suspension damper.

1. «Shock Absorber Replacement»(/chevrolet/corvette/c6-2004-2014/remont/suspension-rear/#rear-suspension-system)
2. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ESC replacement, setup, and programming

Repair Verification

1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Use the scan tool Diagnostic Counter Reset output control function to bypass the 3 consecutive ignition cycle requirement for setting a DTC. This will ensure that if a DTC was to be reset during the repair verification process, it will be displayed on the scan tool.
5. Turn OFF the ignition for 60 seconds.
6. Turn ON the ignition.
7. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to and perform the appropriate diagnostic procedure

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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.

1. Battery voltage is between 9-16 volts.
2. Ignition is ON.

1. 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.
2. The fault is detected during 3 consecutive ignition cycles, or during the same ignition cycle after clearing the DTC with a scan tool.

1. The ESC will enter the speed dependent damping mode.
2. Both left and right normal force outputs will be set to the default output states.
3. The ESC sends a message to the instrument panel cluster (IPC) to display SERVICE RIDE CONTROL message.

A history DTC will clear after 50 consecutive ignition cycles if the condition for the malfunction is no longer present.

Schematic Reference

Electronic Suspension Control Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

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.

1. Ignition OFF, disconnect the harness connector at the appropriate suspension position sensor.
2. Ignition OFF, test for less than 1 ohm between the low reference circuit terminal C and ground. If greater than the specified range, test the low reference circuit for an open/high resistance. If circuit tests normal, replace the ESC module.
3. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground. 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.
4. Verify the scan tool position sensor parameter is less than 0.35 volt. 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.
5. Install a 3A fused jumper wire between the signal circuit terminal B and the 5-volt reference circuit terminal A. Verify the scan tool position sensor parameter is greater than 4.75 volts. If less that 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.
6. If all circuits test normal, test or replace the applicable suspension position sensor.

1. Install a 3A fused jumper wire between the 5-volt reference terminal A and 5 volts. Install a jumper wire between the low reference terminal C and ground.
2. Sweep the suspension position sensor through the entire range while monitoring the voltage between the signal terminal B and the low reference terminal C. The range should vary between 0.35-4.75 volts without any spikes or dropouts. If not within the specified range or if it is erratic, replace the suspension position sensor.

1. «Electronic Suspension Front Position Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
2. «Electronic Suspension Rear Position Sensor Replacement (ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control) or «Electronic Suspension Rear Position Sensor Replacement (w/O ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ESC replacement, setup, and programming

1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Use the scan tool Diagnostic Counter Reset output control function to bypass the 3 consecutive ignition cycle requirement for setting a DTC. This will ensure that if a DTC was to be reset during the repair verification process, it will be displayed on the scan tool.
5. Turn OFF the ignition for 60 seconds.
6. Turn ON the ignition.
7. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to and perform the appropriate diagnostic procedure.

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

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.

1. Battery voltage is between 9-16 volts
2. Ignition is ON

1. The ESC module senses suspension position sensor supply voltage under 4.75 volts or over 5.25 volts.
2. The condition is detected for 1 second in 4 consecutive ignition cycles.

1. Commands speed dependent damping system and normal force signals to the default state.
2. The ESC sends a message to the instrument panel cluster (IPC) to display SERVICE RIDE CONTROL message.

1. A history DTC will clear after 100 consecutive ignition cycles if the condition for the malfunction is no longer present.
2. The ESC module senses the correct sensor supply voltage.
3. The IPC clearing DTC feature.

Schematic Reference

Electronic Suspension Control Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

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.

1. Ignition OFF, disconnect the harness connector at all 4 suspension position sensors.
2. Ignition ON, test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground at each sensor connector. 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.
3. Test for less than .35 volts between the signal circuit terminal B and ground. If greater than the specified range, test the signal circuit for a short to voltage. If the circuit tests normal, replace the ESC module.
4. Reinstall each sensor one at a time. Test for 4.8-5.2 volts between the 5-volt reference circuit terminal A and ground of the last sensor connector to be connected. If the voltage is not within the specified range when one of the 3 sensors are connected, test or replace the suspect suspension position sensor.
5. Test or replace the last remaining suspect suspension position sensor.

1. Install a 3A fused jumper wire between the 5-volt reference terminal A and 5 volts. Install a jumper wire between the low reference terminal C and ground.
2. Sweep the suspension position sensor through the entire range while monitoring the voltage between the signal terminal B and the low reference terminal C. The range should vary between 0.35-4.75 volts without any spikes or dropouts. If not within the specified range or if it is erratic, replace the applicable suspension position sensor.

1. «Electronic Suspension Front Position Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
2. «Electronic Suspension Rear Position Sensor Replacement (ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control) or «Electronic Suspension Rear Position Sensor Replacement (w/O ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
3. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for ESC module replacement, setup, and programming

1. Install any components or connectors that have been removed or replaced during diagnosis.
2. Perform any adjustment, programming or setup procedures that are required when a component or module is removed or replaced.
3. Clear the DTCs.
4. Use the scan tool Diagnostic Counter Reset output control function to bypass the 3 consecutive ignition cycle requirement for setting a DTC. This will ensure that if a DTC was to be reset during the repair verification process, it will be displayed on the scan tool.
5. Turn OFF the ignition for 60 seconds.
6. Turn ON the ignition.
7. If the repair was related to a DTC, duplicate the Conditions for Running the DTC and use the Freeze Frame/Failure Records, if applicable, in order to verify the DTC does not reset. If the DTC resets or another DTC is present, refer to and perform the appropriate diagnostic procedure.

Symptoms - Electronic Suspension Control

Visual/Physical Inspection

1. Inspect for aftermarket devices which could affect the operation of the electronic suspension control (ESC) system. Refer to «Checking Aftermarket Accessories»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__checking-aftermarket-accessories) .
2. Inspect the easily accessible or visible system components for obvious damage or conditions which could cause the symptom.
3. Inspect the connectors to be properly seated and free of corrosion.

Intermittent

Faulty electrical connections or wiring may be the cause of intermittent conditions. Refer to Testing for Intermittent Conditions and Poor Connections .

Symptom List

Refer to a symptom diagnostic procedure from the following list in order to diagnose the symptom

Soft and Non-Uniform Ride

1. Perform the «Diagnostic System Check - Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information) prior to using this diagnostic procedure.
2. Review «Strategy Based Diagnosis»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__strategy-based-diagnosis) for an overview of the diagnostic approach.
3. «Diagnostic Procedure Instructions»(/chevrolet/corvette/c6-2004-2014/remont/oem-general-information/#vehicle-diagnostic-information__diagnostic-procedure-instructions) provides an overview of each diagnostic category.

The electronic suspension control (ESC) module utilizes the suspension position sensor signals to control the suspension dampers. When the driver selects the SPORT position on the suspension control switch, a ground signal is sent to the body control module (BCM). The BCM then sends a serial data signal to the ESC module requesting a firmer damper ride control rate for each damper allowing the driver to customize the ride and handling of the vehicle.

Schematic Reference

Electronic Suspension Control Schematics

Connector End View Reference

Component Connector End Views

Description and Operation

Electronic Suspension Control Description and Operation

Electrical Information Reference

1. «Circuit Testing»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__circuit-testing)
2. «Connector Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__connector-repairs)
3. «Testing for Intermittent Conditions and Poor Connections»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis)
4. «Wiring Repairs»(/chevrolet/corvette/c6-2004-2014/remont/body-electrical/#wiring-systems-and-power-management-service-troubleshooting-diagnosis__wiring-repairs)

Scan Tool Reference

Control Module References for scan tool information

Ignition ON, with the scan tool, observe each Position Sensor data parameter while jouncing the vehicle at each corner. The corresponding parameters should fluctuate with each action.

1. If a parameter does not fluctuate or is erratic, test or replace the position sensor associated with that parameter.

Ignition ON, with the scan tool, observe the Ride Handling Sw. data parameter in the BCM Chassis data list while toggling the suspension control switch between the TOURING and SPORT positions. The parameter should change state.

1. If the parameter does not change state, refer to «Circuit/System Testing»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control) .

1. Ignition OFF, disconnect the suspension control switch.
2. Test for less than 2 ohms between the switch harness connector terminal 3 and ground. If greater than the specified value, repair the open/high resistance.
3. Ignition ON, use a fused jumper to apply and unapply ground at the switch harness connector terminal 2 while observing the Ride Handling Sw. data parameter in the BCM Chassis data list. If the parameter does not switch between states, test the signal circuit for a short to ground or an open/high resistance. If the circuit tests normal, replace the BCM.
4. Test or replace the suspension control switch.

Suspension Control Switch

1. Place the suspension control switch in the TOUR position.
2. Test for infinite resistance between terminal 2 and terminal 3. If less than the specified value, replace the switch.
3. Place the suspension control switch in the SPORT position.
4. Test for less than 2 ohms between terminal 2 and terminal 3. If greater than the specified value, replace the switch.

Suspension Position Sensor

1. Install a 3A fused jumper wire between the 5 volt reference terminal A and 5 volts. Install a jumper wire between the low reference terminal C and ground.
2. Sweep the suspension position sensor through the entire range while monitoring the voltage between the signal terminal B and the low reference terminal C. The range should vary between 0.35-4.75 volts without any spikes or dropouts. If not within the specified range or if it is erratic, replace the applicable suspension position sensor.

Perform the Diagnostic Repair Verification after completing the diagnostic procedure.

1. «Electronic Suspension Switch Replacement»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
2. «Electronic Suspension Front Position Sensor Replacement»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
3. «Electronic Suspension Rear Position Sensor Replacement (ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control) or «Electronic Suspension Rear Position Sensor Replacement (w/O ZR1)»(/chevrolet/corvette/c6-2004-2014/remont/electronic-suspension/#suspension-control-system-real-time-damping-control)
4. «Control Module References»(/chevrolet/corvette/c6-2004-2014/remont/communication-devices/#programming-and-setup-all-systems__control-module-references) for BCM replacement, setup, and programming

Scheme 3

Scheme 4

Removal Procedure

1. Turn OFF the ignition switch.
2. Raise the vehicle on a suitable safety stand. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Disconnect the position sensor connector (3).
5. Remove the position sensor harness retainers.
6. Remove the position sensor link from the control arm link stud (2).
7. Remove the position sensor mounting bolts (4).
8. Remove the position sensor (1) from the vehicle.

Installation Procedure

1. Install the position sensor (1) in the vehicle.
2. Install the position sensor mounting bolts (4). Tighten: Tighten the bolts to 3 N.m (26 lb in).
3. Install the position sensor link to the control arm link stud (2).
4. Connect the position sensor electrical connector (3).
5. Secure the position sensor harness with the retainers.
6. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
7. Lower the vehicle.

Scheme 5

1. Turn OFF the ignition switch.
2. Raise and support the vehicle. Refer to «Lifting and Jacking the Vehicle»(/chevrolet/corvette/c6-2004-2014/remont/hoistjack/#general-information__lifting-and-jacking-the-vehicle) .
3. Remove the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
4. Disconnect the electronic suspension control (ESC) position sensor harness connector.
5. Disconnect the position sensor link from the control arm link stud.
6. Remove the position sensor mounting bolt.
7. Remove the position sensor from the vehicle.

1. Install the position sensor to the vehicle.
2. Install the position sensor mounting bolt and tighten to 7 N.m (62 lb in).
3. Connect the position sensor link to the control arm link stud.
4. Connect the ESC position harness connector.
5. Install the tire and wheel assembly. Refer to «Tire and Wheel Removal and Installation»(/chevrolet/corvette/c6-2004-2014/remont/wheel-tire-system/#tires-and-wheels) .
6. Lower the vehicle.

Electronic Suspension Control Description

The Electronic Suspension Control system is a Magneto-Rheological Real Time Damping (MRRTD) system and independently controls the fluid viscosity in each strut and shock absorbers to control the vehicle ride characteristics.

The following are involved in the operation of the ESC system

1. Electronic suspension control module (ESCM)-Controls and detects failures in the ESC system. The ESCM controls the damping force at all 4 shock absorbers individually for a soft or firm ride. It receives inputs from vehicle speed, steering wheel position, suspension position, and lift/dive status to determine the amount of damper control to the shocks electrical coil.
2. Front/rear suspension position sensors-The ESC module provides a 5-volt reference and low reference to all 4 of the body-to-wheel suspension position sensors. The sensors send the ESCM a signal voltage that is relative to the suspension ride height used to determine the amount of damper control. The sensors valid range is 0.35-4.75 volts.
3. Front struts/rear shock absorbers have an internal electrical coil, and micron sized metal particles in the fluid.
4. Vehicle speed-The ESCM receives a serial data message for vehicle speed input, and is used to determine the amount of damper control.
5. Steering wheel position-The ESCM receives a serial data message for steering wheel position input and uses this as an indication of the position and rotation of the steering wheel to determine the amount of damper control.
6. Suspension control switch-The suspension control switch has two positions, TOUR and SPORT. When the switch is placed in the SPORT position, a ground signal is received by the body control module (BCM). The BCM then sends a serial data message to the ESCM to modify the shock damper rates which will change the ride and handling characteristics of the vehicle.

The ESCM monitors the inputs from the front/rear suspension position sensors, vehicle speed, and steering wheel position. The ESCM calculates the inputs to control 0-100 percent of PWM current to the coil within each strut or shock, increasing the fluids viscosity by aligning the metal particles with each other. This increases or decreases the suspension damping force in both compression and rebound directions.

When the ESCM detects a malfunction and sets a DTC. The system disables, and defaults with a fail-soft action, then sends a serial data message for the Instrument Panel Cluster (IPC) to display SERVICE RIDE CONTROL and SPEED LIMITED warning messages.

The ESC system uses an ignition cycling diagnostic approach in order to reduce the occurrence of false or intermittent DTCs that do not affect the functionality of the ESC system. This allows the fail-soft actions to be taken whenever a malfunction condition is current, but requires the malfunction to be current for 3 consecutive ignition on cycles before the corresponding malfunction code and message will be stored or displayed.

Special Tools

Illustration Tool Number/Description J 35616-A Connector Test Adapter Kit J 39200 Digital Multimeter J 42236-A Serial Data Link Tester J 34142-B Test Light 7000081 Tech 2 Kit

Scheme 6

Scheme 7

Scheme 8

Scheme 9

See also:
• Diagnostic System Check - Vehicle
• Strategy Based Diagnosis
• Diagnostic Procedure Instructions
• Component Connector End Views
• Circuit Testing
• Connector Repairs
• Testing for Intermittent Conditions and Poor Connections
• Wiring Repairs
• Control Module References
• Diagnostic Repair Verification
• Shock Absorber Replacement
• Checking Aftermarket Accessories
• Instrument Panel Accessory Trim Plate Replacement
• Lifting and Jacking the Vehicle
• Front Wheelhouse Liner Replacement (Front Liner)
• Tire and Wheel Removal and Installation
• Fastener Caution
• DTC C0558