Code
P0569
HUMMER
P — Powertrain
Cruise Control Coast Signal Malfunction
Views:
UK: 15
EN: 21
RU: 22
AI status
Completed
Completed
100%
Causes
- Open or shorted wiring between coast switch and control module
- Faulty cruise control coast switch (steering wheel/lever)
- Corroded or loose connector or poor ground at switch or module
- Faulty PCM/BCM or related input circuitry
- Intermittent connector contact from steering wheel clock spring (if applicable)
- Aftermarket steering wheel device or previous repair damage
Symptoms
- Cruise control may not coast or disengage properly
- Cruise set/coast function unresponsive or intermittent
- Malfunction indicator lamp (MIL/CEL) may be illuminated
- Stored P0569 and possibly related codes in vehicle memory
What to check
- Read and record all stored and pending codes and freeze frame data with a scan tool
- Inspect fuse(s) related to cruise control and associated modules
- Visually inspect wiring, connectors and steering wheel/column area for damage or corrosion
- Check for related codes (brake/clutch switches, CAN communication, power/ground faults)
- Verify clock spring condition if switches on steering wheel are involved
Signal parameters
- Typical coast switch behavior: open when not pressed (pulled up to reference voltage), closed when pressed (pulled toward ground)
- Expected voltage at switch connector: ~0V when switch closed; near reference/pull‑up voltage (approx. 5–12 V depending on vehicle) when open
- Resistance of closed mechanical switch: near 0–5 Ω; infinite when open
- Signal should be clean and switch only when physically actuated (no bouncing or intermittent opens)
Diagnostic algorithm
- Connect a scan tool, confirm P0569 and note any additional codes or freeze frame data. 2. Verify vehicle battery voltage is within normal range; low system voltage can cause false signals. 3. Inspect fuses and relays for cruise and associated modules. 4. Visually inspect harnesses/connectors at the steering wheel, column, clockspring, and at the PCM/BCM for damage, corrosion, or loose pins. 5. Backprobe the coast switch connector and observe signal with a multimeter or scope while actuating the switch. Confirm expected open/closed voltages and that the signal is stable (no intermittent changes). 6. If signal missing or incorrect, check continuity between the switch and module; repair any opens/shorts. 7. If intermittent only when steering is turned, suspect clock spring—test or replace as needed. 8. If wiring and switch test good, test/replace the module input or consult manufacturer procedures for module bench tests. 9. After repairs, clear codes and verify proper cruise function and that code does not return during road test.
Likely causes
- Broken/shorted wire at the steering column or steering wheel harness
- Failed coast switch contacts due to wear or contamination
- Damaged clock spring affecting switch signals
- Corroded connector/pin causing high resistance or intermittent contact
Fault status
Status
Cruise control coast input circuit malfunction detected — signal out of range, open, short or intermittent. Cruise may be disabled until fault is corrected.
Repair difficulty: Medium
Diagnostic time: 1.0-2.5 hours
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