Code
P0568
Generic
P — Powertrain
Cruise Control Set Signal
Views:
UK: 16
EN: 26
RU: 19
AI status
Completed
Completed
100%
Causes
- Short to battery (circuit sees constant 12V or higher than expected)
- Open circuit or short to ground in the switch wiring
- Faulty cruise control SET switch (stuck or internally shorted)
- Corroded, loose, or damaged connector at the switch or module
- Blown or poor fuse or fused power/ignition feed
- Faulty instrument/ECU/module input circuitry
Symptoms
- Cruise control will not set or engage
- Cruise control behaves intermittently or cancels unexpectedly
- Malfunction Indicator Lamp (MIL) or cruise warning light may illuminate
- Stored P0568 trouble code and possibly related codes
- No response when pressing the SET button on the steering wheel
What to check
- Connect a scan tool, read freeze frame and related codes, and monitor live data for the cruise SET input while operating the switch
- Visually inspect steering column wiring, harness routing, and connectors for damage, pin push-out, corrosion, or recent repairs
- Check applicable fuses and fused power/ignition feeds for the cruise control circuit
- Backprobing: measure the signal voltage at the cruise SET switch connector with ignition ON and while actuating the switch
- Perform continuity/resistance checks between the switch terminal and the module input, and between the switch and ground/power as applicable
- Wiggle test wiring while observing live data to find intermittent faults
Signal parameters
- Typical reference: 5 V reference/logic input on many systems (varies by vehicle)
- Expected inactive/idle voltage: near 0–0.5 V or near reference voltage depending on switch logic (verify with factory data)
- Expected active voltage: roughly 4–5 V (if pull-up logic) or 0 V (if switch pulls to ground) — check vehicle-specific design
- Fault condition indicators: voltage above expected reference (e.g., >5.5 V) or constant battery voltage (~12 V) suggests short to B+; open circuit may show floating voltage or stuck value
Diagnostic algorithm
- Retrieve freeze frame and related codes with a scan tool. Note ignition state and conditions when code set.
- With ignition ON (engine off), monitor the cruise SET input on the scan tool. Operate the SET switch and observe signal changes.
- Visually inspect the steering wheel/switch area, harness, and connectors for damage, chafing, or corrosion. Repair any obvious damage.
- Check fuses and power/ignition feeds related to cruise control. Replace any blown fuses and re-test.
- Backprobe the switch connector and measure voltage at the signal pin with switch at rest and while actuated. Compare to expected values.
- Check continuity between the switch signal terminal and the module input pin with ignition off. Repair any open circuit or high-resistance connection.
- If the signal measures battery voltage, trace wiring for a short to B+ (inspect pin terminals for contact with chassis or power).
- If the switch wiring and connector test good, disconnect the switch and bench-test or substitute the switch per service manual to confirm failure.
- If switch and wiring are good, inspect/replace the module input or consult manufacturer diagnostics for module testing. Re-scan and clear codes; verify repair by road test.
- Safety note: follow vehicle manufacturer procedures for SRS/airbag and steering wheel removal if accessing steering wheel switches; disconnect battery and wait required time when instructed.
Likely causes
- Damaged/crushed wiring near steering column or switch (most common)
- Failed SET switch on steering wheel
- Connector corrosion or poor terminal contact
- Short to battery from pin damage or pin pushed out of connector
- Faulty PCM/BCM input (less common)
Fault status
Status
Cruise Control SET signal out of range (circuit high/low or open). Check SET switch, wiring, connectors, fused power, and module input.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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Code
P0568
GWM
P — Powertrain
- Cruise control system speed setting signal malfunction
Views:
UK: 2
EN: 2
RU: 3
AI status
Completed
Completed
100%
Causes
- Short to battery (circuit sees constant 12V or higher than expected)
- Open circuit or short to ground in the switch wiring
- Faulty cruise control SET switch (stuck or internally shorted)
- Corroded, loose, or damaged connector at the switch or module
- Blown or poor fuse or fused power/ignition feed
- Faulty instrument/ECU/module input circuitry
Symptoms
- Cruise control will not set or engage
- Cruise control behaves intermittently or cancels unexpectedly
- Malfunction Indicator Lamp (MIL) or cruise warning light may illuminate
- Stored P0568 trouble code and possibly related codes
- No response when pressing the SET button on the steering wheel
What to check
- Connect a scan tool, read freeze frame and related codes, and monitor live data for the cruise SET input while operating the switch
- Visually inspect steering column wiring, harness routing, and connectors for damage, pin push-out, corrosion, or recent repairs
- Check applicable fuses and fused power/ignition feeds for the cruise control circuit
- Backprobing: measure the signal voltage at the cruise SET switch connector with ignition ON and while actuating the switch
- Perform continuity/resistance checks between the switch terminal and the module input, and between the switch and ground/power as applicable
- Wiggle test wiring while observing live data to find intermittent faults
Signal parameters
- Typical reference: 5 V reference/logic input on many systems (varies by vehicle)
- Expected inactive/idle voltage: near 0–0.5 V or near reference voltage depending on switch logic (verify with factory data)
- Expected active voltage: roughly 4–5 V (if pull-up logic) or 0 V (if switch pulls to ground) — check vehicle-specific design
- Fault condition indicators: voltage above expected reference (e.g., >5.5 V) or constant battery voltage (~12 V) suggests short to B+; open circuit may show floating voltage or stuck value
Diagnostic algorithm
- Retrieve freeze frame and related codes with a scan tool. Note ignition state and conditions when code set.
- With ignition ON (engine off), monitor the cruise SET input on the scan tool. Operate the SET switch and observe signal changes.
- Visually inspect the steering wheel/switch area, harness, and connectors for damage, chafing, or corrosion. Repair any obvious damage.
- Check fuses and power/ignition feeds related to cruise control. Replace any blown fuses and re-test.
- Backprobe the switch connector and measure voltage at the signal pin with switch at rest and while actuated. Compare to expected values.
- Check continuity between the switch signal terminal and the module input pin with ignition off. Repair any open circuit or high-resistance connection.
- If the signal measures battery voltage, trace wiring for a short to B+ (inspect pin terminals for contact with chassis or power).
- If the switch wiring and connector test good, disconnect the switch and bench-test or substitute the switch per service manual to confirm failure.
- If switch and wiring are good, inspect/replace the module input or consult manufacturer diagnostics for module testing. Re-scan and clear codes; verify repair by road test.
- Safety note: follow vehicle manufacturer procedures for SRS/airbag and steering wheel removal if accessing steering wheel switches; disconnect battery and wait required time when instructed.
Likely causes
- Damaged/crushed wiring near steering column or switch (most common)
- Failed SET switch on steering wheel
- Connector corrosion or poor terminal contact
- Short to battery from pin damage or pin pushed out of connector
- Faulty PCM/BCM input (less common)
Fault status
Status
Cruise Control SET signal out of range (circuit high/low or open). Check SET switch, wiring, connectors, fused power, and module input.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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Code
P0568
HUMMER
P — Powertrain
Cruise Control Set Signal Malfunction
Views:
UK: 7
EN: 14
RU: 8
AI status
Completed
Completed
100%
Causes
- Short to battery (circuit sees constant 12V or higher than expected)
- Open circuit or short to ground in the switch wiring
- Faulty cruise control SET switch (stuck or internally shorted)
- Corroded, loose, or damaged connector at the switch or module
- Blown or poor fuse or fused power/ignition feed
- Faulty instrument/ECU/module input circuitry
Symptoms
- Cruise control will not set or engage
- Cruise control behaves intermittently or cancels unexpectedly
- Malfunction Indicator Lamp (MIL) or cruise warning light may illuminate
- Stored P0568 trouble code and possibly related codes
- No response when pressing the SET button on the steering wheel
What to check
- Connect a scan tool, read freeze frame and related codes, and monitor live data for the cruise SET input while operating the switch
- Visually inspect steering column wiring, harness routing, and connectors for damage, pin push-out, corrosion, or recent repairs
- Check applicable fuses and fused power/ignition feeds for the cruise control circuit
- Backprobing: measure the signal voltage at the cruise SET switch connector with ignition ON and while actuating the switch
- Perform continuity/resistance checks between the switch terminal and the module input, and between the switch and ground/power as applicable
- Wiggle test wiring while observing live data to find intermittent faults
Signal parameters
- Typical reference: 5 V reference/logic input on many systems (varies by vehicle)
- Expected inactive/idle voltage: near 0–0.5 V or near reference voltage depending on switch logic (verify with factory data)
- Expected active voltage: roughly 4–5 V (if pull-up logic) or 0 V (if switch pulls to ground) — check vehicle-specific design
- Fault condition indicators: voltage above expected reference (e.g., >5.5 V) or constant battery voltage (~12 V) suggests short to B+; open circuit may show floating voltage or stuck value
Diagnostic algorithm
- Retrieve freeze frame and related codes with a scan tool. Note ignition state and conditions when code set.
- With ignition ON (engine off), monitor the cruise SET input on the scan tool. Operate the SET switch and observe signal changes.
- Visually inspect the steering wheel/switch area, harness, and connectors for damage, chafing, or corrosion. Repair any obvious damage.
- Check fuses and power/ignition feeds related to cruise control. Replace any blown fuses and re-test.
- Backprobe the switch connector and measure voltage at the signal pin with switch at rest and while actuated. Compare to expected values.
- Check continuity between the switch signal terminal and the module input pin with ignition off. Repair any open circuit or high-resistance connection.
- If the signal measures battery voltage, trace wiring for a short to B+ (inspect pin terminals for contact with chassis or power).
- If the switch wiring and connector test good, disconnect the switch and bench-test or substitute the switch per service manual to confirm failure.
- If switch and wiring are good, inspect/replace the module input or consult manufacturer diagnostics for module testing. Re-scan and clear codes; verify repair by road test.
- Safety note: follow vehicle manufacturer procedures for SRS/airbag and steering wheel removal if accessing steering wheel switches; disconnect battery and wait required time when instructed.
Likely causes
- Damaged/crushed wiring near steering column or switch (most common)
- Failed SET switch on steering wheel
- Connector corrosion or poor terminal contact
- Short to battery from pin damage or pin pushed out of connector
- Faulty PCM/BCM input (less common)
Fault status
Status
Cruise Control SET signal out of range (circuit high/low or open). Check SET switch, wiring, connectors, fused power, and module input.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
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Code
P0568
LAND ROVER
P — Powertrain
Malfunction of the speed control switch circuit
Views:
UK: 6
EN: 12
RU: 7
AI status
Completed
Completed
100%
Causes
- Short to battery (circuit sees constant 12V or higher than expected)
- Open circuit or short to ground in the switch wiring
- Faulty cruise control SET switch (stuck or internally shorted)
- Corroded, loose, or damaged connector at the switch or module
- Blown or poor fuse or fused power/ignition feed
- Faulty instrument/ECU/module input circuitry
Symptoms
- Cruise control will not set or engage
- Cruise control behaves intermittently or cancels unexpectedly
- Malfunction Indicator Lamp (MIL) or cruise warning light may illuminate
- Stored P0568 trouble code and possibly related codes
- No response when pressing the SET button on the steering wheel
What to check
- Connect a scan tool, read freeze frame and related codes, and monitor live data for the cruise SET input while operating the switch
- Visually inspect steering column wiring, harness routing, and connectors for damage, pin push-out, corrosion, or recent repairs
- Check applicable fuses and fused power/ignition feeds for the cruise control circuit
- Backprobing: measure the signal voltage at the cruise SET switch connector with ignition ON and while actuating the switch
- Perform continuity/resistance checks between the switch terminal and the module input, and between the switch and ground/power as applicable
- Wiggle test wiring while observing live data to find intermittent faults
Signal parameters
- Typical reference: 5 V reference/logic input on many systems (varies by vehicle)
- Expected inactive/idle voltage: near 0–0.5 V or near reference voltage depending on switch logic (verify with factory data)
- Expected active voltage: roughly 4–5 V (if pull-up logic) or 0 V (if switch pulls to ground) — check vehicle-specific design
- Fault condition indicators: voltage above expected reference (e.g., >5.5 V) or constant battery voltage (~12 V) suggests short to B+; open circuit may show floating voltage or stuck value
Diagnostic algorithm
- Retrieve freeze frame and related codes with a scan tool. Note ignition state and conditions when code set.
- With ignition ON (engine off), monitor the cruise SET input on the scan tool. Operate the SET switch and observe signal changes.
- Visually inspect the steering wheel/switch area, harness, and connectors for damage, chafing, or corrosion. Repair any obvious damage.
- Check fuses and power/ignition feeds related to cruise control. Replace any blown fuses and re-test.
- Backprobe the switch connector and measure voltage at the signal pin with switch at rest and while actuated. Compare to expected values.
- Check continuity between the switch signal terminal and the module input pin with ignition off. Repair any open circuit or high-resistance connection.
- If the signal measures battery voltage, trace wiring for a short to B+ (inspect pin terminals for contact with chassis or power).
- If the switch wiring and connector test good, disconnect the switch and bench-test or substitute the switch per service manual to confirm failure.
- If switch and wiring are good, inspect/replace the module input or consult manufacturer diagnostics for module testing. Re-scan and clear codes; verify repair by road test.
- Safety note: follow vehicle manufacturer procedures for SRS/airbag and steering wheel removal if accessing steering wheel switches; disconnect battery and wait required time when instructed.
Likely causes
- Damaged/crushed wiring near steering column or switch (most common)
- Failed SET switch on steering wheel
- Connector corrosion or poor terminal contact
- Short to battery from pin damage or pin pushed out of connector
- Faulty PCM/BCM input (less common)
Fault status
Status
Cruise Control SET signal out of range (circuit high/low or open). Check SET switch, wiring, connectors, fused power, and module input.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
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Code
P0568
MERCEDES-BENZ
P — Powertrain
Cruise Control Set Signal Malfunction
Views:
UK: 8
EN: 19
RU: 16
AI status
Completed
Completed
100%
Causes
- Short to battery (circuit sees constant 12V or higher than expected)
- Open circuit or short to ground in the switch wiring
- Faulty cruise control SET switch (stuck or internally shorted)
- Corroded, loose, or damaged connector at the switch or module
- Blown or poor fuse or fused power/ignition feed
- Faulty instrument/ECU/module input circuitry
Symptoms
- Cruise control will not set or engage
- Cruise control behaves intermittently or cancels unexpectedly
- Malfunction Indicator Lamp (MIL) or cruise warning light may illuminate
- Stored P0568 trouble code and possibly related codes
- No response when pressing the SET button on the steering wheel
What to check
- Connect a scan tool, read freeze frame and related codes, and monitor live data for the cruise SET input while operating the switch
- Visually inspect steering column wiring, harness routing, and connectors for damage, pin push-out, corrosion, or recent repairs
- Check applicable fuses and fused power/ignition feeds for the cruise control circuit
- Backprobing: measure the signal voltage at the cruise SET switch connector with ignition ON and while actuating the switch
- Perform continuity/resistance checks between the switch terminal and the module input, and between the switch and ground/power as applicable
- Wiggle test wiring while observing live data to find intermittent faults
Signal parameters
- Typical reference: 5 V reference/logic input on many systems (varies by vehicle)
- Expected inactive/idle voltage: near 0–0.5 V or near reference voltage depending on switch logic (verify with factory data)
- Expected active voltage: roughly 4–5 V (if pull-up logic) or 0 V (if switch pulls to ground) — check vehicle-specific design
- Fault condition indicators: voltage above expected reference (e.g., >5.5 V) or constant battery voltage (~12 V) suggests short to B+; open circuit may show floating voltage or stuck value
Diagnostic algorithm
- Retrieve freeze frame and related codes with a scan tool. Note ignition state and conditions when code set.
- With ignition ON (engine off), monitor the cruise SET input on the scan tool. Operate the SET switch and observe signal changes.
- Visually inspect the steering wheel/switch area, harness, and connectors for damage, chafing, or corrosion. Repair any obvious damage.
- Check fuses and power/ignition feeds related to cruise control. Replace any blown fuses and re-test.
- Backprobe the switch connector and measure voltage at the signal pin with switch at rest and while actuated. Compare to expected values.
- Check continuity between the switch signal terminal and the module input pin with ignition off. Repair any open circuit or high-resistance connection.
- If the signal measures battery voltage, trace wiring for a short to B+ (inspect pin terminals for contact with chassis or power).
- If the switch wiring and connector test good, disconnect the switch and bench-test or substitute the switch per service manual to confirm failure.
- If switch and wiring are good, inspect/replace the module input or consult manufacturer diagnostics for module testing. Re-scan and clear codes; verify repair by road test.
- Safety note: follow vehicle manufacturer procedures for SRS/airbag and steering wheel removal if accessing steering wheel switches; disconnect battery and wait required time when instructed.
Likely causes
- Damaged/crushed wiring near steering column or switch (most common)
- Failed SET switch on steering wheel
- Connector corrosion or poor terminal contact
- Short to battery from pin damage or pin pushed out of connector
- Faulty PCM/BCM input (less common)
Fault status
Status
Cruise Control SET signal out of range (circuit high/low or open). Check SET switch, wiring, connectors, fused power, and module input.
Repair difficulty: Medium
Diagnostic time: 0.5-2 hours
Similar codes
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Was this AI description helpful?
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