Buick Regal: DTC C0575, C0580, C0585, or C0590
Diagnostic Instructions
- 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.
DTC Descriptors
DTC C0575
Left Front Damper Actuator Circuit
DTC C0580
Right Front Damper Actuator Circuit
DTC C0585
Left Rear Damper Actuator Circuit
DTC C0590
Right Rear Damper Actuator Circuit
For symptom byte information, refer to Symptom Byte List.
Diagnostic Fault Information
Circuit/System Description
The suspension control module commands variable levels of current to each
shock absorber actuator in
response to rough road, braking or abrupt steering maneuver driving conditions.
The current variation is
performed by pulse width modulation (PWM) of the system voltage. The suspension
control module
continuously measures the actual current of each actuator. When a deviation
between commanded and
actual current is detected, a DTC is set.
Conditions for Running the DTC
System voltage is between 9 - 16 V.
Conditions for Setting the DTC
C0575 02, C0580 02, C0585 02, and C0590 02
A short to ground on the control circuit is detected.
C0575 04, C0580 04, C0585 04, and C0590 04
An open circuit on the control circuit is detected.
C0575 0F, C0580 0F, C0585 0F, and C0590 0F
An erratic current on the actuator circuit is detected.
Action Taken When the DTC Sets
- The electronic suspension control is disabled for the duration of the
ignition cycle.
- The driver information center displays the SERVICE SUSPENSION SYSTEM
message.
Conditions for Clearing the DTC
- A present DTC will clear on the next consecutive malfunction-free
ignition cycle.
- A history DTC will clear after 41 consecutive malfunction-free ignition
cycles.
Reference Information
Schematic Reference
Electronic Suspension Control Wiring Schematics
Connector End View Reference
COMPONENT CONNECTOR END VIEW INDEX
Description and Operation
Electronic Suspension Control Description and Operation
Electrical Information Reference
- Circuit Testing
- Connector Repairs
- Testing for Intermittent Conditions and Poor Connections
- Wiring Repairs
Scan Tool Reference
Control Module References for scan tool information.
Circuit/System Testing
1. Ignition OFF, disconnect the harness connector at the appropriate Q37
Shock Absorber Actuator.
2. Connect a test lamp between the control circuits terminal 1 and terminal 2,
ignition ON.
3. Verify the test lamp illuminates.
- If the test lamp does not illuminate
- Ignition OFF, remove the test lamp, disconnect the harness connector at
the K19 Suspension
Control Module.
- Test for infinite resistance between the control circuits listed below
and ground.
- Terminal 1
- Terminal 2
- If less than infinite resistance, repair the short to ground on the
circuit.
- Go to next step: If infinite resistance.
- Test for less than 2 Ω in the control circuits listed below end to end.
- Terminal 1
- Terminal 2
- If 2 Ω or greater, repair the open/high resistance in the circuit.
- Go to next step: If less than 2 Ω
- Test for less than 1V between the control circuits listed below and
ground.
- Terminal 1
- Terminal 2
- If 1V or greater, repair the short to voltage in the circuit.
- If less than 1V, replace the K19 Suspension Control Module
- Go to next step: If the test illuminates
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the appropriate Q37
Shock Absorber Actuator.
2. Test for 2 - 4 Ω between the Q37 Shock Absorber Actuator control terminals.
- If not within the specified range, replace the Q37 Shock Absorber
Actuator.
Repair Instructions
Perform the Diagnostic Repair Verification after completing the diagnostic
procedure.
- Strut Assembly Removal and Installation for front strut replacement
- Shock Absorber Replacement (GNC) Shock Absorber Replacement (GNQ) for
rear shock
absorber replacement
- Control Module References for suspension control module replacement,
programming, and
setup
READ NEXT:
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
Diagnostic Instructions
Perform the Diagnostic System Check - Vehicle prior to using this
diagnostic procedure.
Review Strategy Based Diagnosis for an overview of the diagnostic
approach.
Diag
SEE MORE:
Special Tools
J-45859 Hub Spindle Remover
DT-51504 Seal Protector
Equivalent regional tools:Special Tools
Removal Procedure
1. Raise and support the vehicle.
2. Remove the left front tire and wheel assembly.
3. With the aid of an assistant holding the brake pedal down, use a breaker bar
and
Tools Required
GE-45268 Air Conditioning Flushing Adapter Kit
GE-41447-a Leak Detection Dye
GE-50078 Electronic Leak Detector
GE-50300 Air Conditioning Service Center for HFO1234-yf
General Information
R-1234yf (HFO-1234yf) - 2, 3, 3, 3 - Tetrafluoroprop-1-ene (CF3CFCH2), is an
olefin contain