P0576

Code

GWM P — Powertrain

- Cruise control system malfunction

Brand: GWM

Type: P — Powertrain

Views: UK: 12 EN: 24 RU: 17

AI status

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Page language: EN

Faulty brake light / brake pedal position switch or incorrect switch adjustment
Defective cruise control stalk/switch or connector
Open/short or corroded wiring/connectors in cruise, brake switch, or CAN lines
Loss of communication between control modules (BCM/PCM/ABS via CAN bus)
Faulty vehicle speed sensor (VSS) or ABS wheel speed module
Defective electronic throttle control (ETC) / throttle actuator or accelerator pedal position sensor

Read all stored codes and freeze frame data from all modules (PCM, BCM, ABS, instrument cluster).
Check for related or dependent U-codes (communication errors) and other P-codes.
Visually inspect fuses, relays, ground points and harness connectors related to cruise, brake switch, throttle, and CAN bus.
Verify brake light operation and test brake pedal switch function and adjustment.
Check cruise control stalk/switch operation with scan tool or multimeter.
Monitor live data: brake switch state, cruise enable bit, vehicle speed, accelerator pedal position, and throttle actuator command/feedback.

Cruise enable/status bit (from BCM/PCM): should show 'available' when switch is ON and preconditions met.
Set speed: should be stable and equal to vehicle speed when engaged.
Brake switch status: should show 'released' (no brake) when cruise can be engaged and change state immediately when pedal pressed.
Vehicle speed: present and accurate in live data (no dropouts); speed signal should change with wheel rotation.
Accelerator pedal position vs. throttle position: correlated values and within manufacturer tolerance.
Throttle actuator command vs. feedback: commanded position should be followed by feedback position.

Connect a capable scan tool and record all stored codes and pending codes from PCM, BCM, ABS and instrument cluster. Note freeze frame data.
Clear codes and attempt to reproduce the fault while monitoring live data for brake switch, cruise enable bit, vehicle speed, accelerator pedal, and throttle position.
Inspect related fuses, relays and ground straps. Repair any corrosion or poor connections.
Verify brake lights operate and test brake pedal switch continuity or scanned status. Replace or adjust switch if inconsistent.
Test cruise stalk/switch inputs at the connector while operating the switch; verify the module receives the commands.
Check wiring and connectors between cruise switch, brake switch and controlling module(s) for opens/shorts or water ingress; repair as needed.
If vehicle speed is suspect, test VSS/ABS wheel speed sensors and wiring and confirm accurate speed data to PCM/BCM.
Monitor CAN bus traffic and voltages; isolate and repair any module communication faults (check for termination and wiring shorts).
If throttle/pedal correlation faults exist, perform accelerator pedal and ETC tests per manufacturer procedure and replace faulty components if required.
If wiring, sensors and switches test OK, consider module software update or reflash. If a specific module fails internal self-test, follow module replacement procedures.
After repairs, clear codes and road-test to confirm the issue is resolved and no new codes return.

⚠️ Status

Cruise Control System Malfunction — check brake switch, cruise switch, wiring and module communications (BCM/PCM/CAN).

🟡 Repair difficulty: Medium

⏱️ Diagnostic time: 1.0 - 3.0 hours

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P0576 — - Cruise control system malfunction