2010 Cadillac Truck SRX FWD V6-3.0L Page 844
1. Connect a test lamp and ammeter in series between both Q37 shock absorber actuator harness connector control circuit terminals.
2. Ignition ON, with a scan tool, attempt to clear all K19 suspension control module DTC's (codes may not clear).
3. With a scan tool, command the Damper Actuator to Increase the amperage to approximately 400 mA and Decrease to 0 mA while comparing
the ammeter displayed values and scan tool Damper Actuator Command parameter displayed values. Verify the following:
* The test lamp is illuminated.
* The ammeter displayed values and scan tool Damper Actuator Command parameter displayed values change and are simultaneously
within 15 mA of each other.
瀚慖f the test lamp is not illuminated and/or the values are not within the specified range, test both control circuits for a short to voltage, short
to ground, or open/high resistance. If all circuits test normal, replace the K19 suspension control module.
4. If all circuits test normal, test or replace the Q37 shock absorber actuator.
Component Testing
Static Test
1. Ignition OFF, disconnect the harness connector at the appropriate Q37 shock absorber actuator.
2. Test for 2-3 ohm between the Q37 shock absorber actuator control terminals.
瀚慖f not within the specified range, replace the Q37 shock absorber actuator.
Repair Instructions
Perform the Diagnostic Repair Verification (See: Verification Tests) after completing the diagnostic procedure.
* Strut, Strut Component, or Spring Replacement (See: Steering and Suspension/Suspension/Suspension Spring ( Coil / Leaf )/Service and
Repair/Front Suspension Coil Spring)
* Shock Absorber Replacement (See: Steering and Suspension/Suspension/Suspension Strut / Shock Absorber/Service and Repair/Rear
Suspension Shock Absorber)
* Control Module References (See: Testing and Inspection/Programming and Relearning) for suspension control module replacement, setup,
and programming
C0590
DTC C0575, C0580, C0585, or C0590
Diagnostic Instructions
* Perform the Diagnostic System Check - Vehicle (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic System
Check - Vehicle) prior to using this diagnostic procedure.
* Review Strategy Based Diagnosis (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Strategy Based Diagnosis) for an
overview of the diagnostic approach.
* Diagnostic Procedure Instructions (See: Testing and Inspection/Initial Inspection and Diagnostic Overview/Diagnostic Procedure
Instructions) provides an overview of each diagnostic category.
DTC Descriptors
DTC C0575 02
- Left Front Damper Actuator Circuit Short to Ground
DTC C0575 04
- Left Front Damper Actuator Circuit Open
DTC C0575 0F
- Left Front Damper Actuator Circuit Signal Erratic
DTC C0580 02
- Right Front Damper Actuator Circuit Short to Ground
DTC C0580 04
- Right Front Damper Actuator Circuit Open
DTC C0580 0F
- Right Front Damper Actuator Circuit Signal Erratic
DTC C0585 02
- Left Rear Damper Actuator Circuit Short to Ground
