Toggle Side Panel

Shopping Cart

No products in the basket.

Shopping Cart

No products in the basket.

Close search
Home / DTC / P0578 — Cruise Control Multi-Function Input A Circuit Stuck

P0578 — Cruise Control Multi-Function Input A Circuit Stuck

Detailed page for trouble code P0578.

35,619codes
59brands
11,925generic
23,694specific
All codes P-codes (Powertrain) B-codes (Body) C-codes (Chassis) U-codes (Network/User) Tesla Alerts
Reset
Code

P0578

Generic P — Powertrain

Cruise Control Multi-Function Input A Circuit Stuck

Brand: Generic
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty cruise control multi-function switch (steering wheel button assembly)
  • Faulty clockspring (spiral cable) or broken internal steering-wheel wiring
  • Short to battery voltage or short to ground in the switch harness
  • Open circuit or intermittent wiring/connectors (corrosion, broken wire)
  • Faulty instrument cluster/BCM/ECM input circuit
  • Aftermarket steering-wheel accessory or improper installation

Symptoms

  • Cruise control will not engage or responds unpredictably
  • Cruise control switch/buttons do not register when pressed
  • Cruise indicator lamp may flash or not illuminate
  • Related steering-wheel buttons (if shared circuit) may not work
  • Possible stored DTCs for related input circuits or communication

What to check

  • Use a scan tool to read DTCs and live data for Cruise Multi-Function Input A while pressing each cruise button
  • Confirm the code is current and reproduce the fault before replacing parts
  • Visually inspect steering column, connector pins, and wiring harness for damage or corrosion
  • Backprobe the switch connector and measure voltage/changes while operating the switches
  • Check continuity between the switch connector and the module input with harness disconnected
  • Inspect/measure clockspring continuity and operation, especially if other steering-wheel functions fail

Signal parameters

  • Typical reference: a variable or discrete signal referenced to vehicle 5 V or ground (depends on vehicle)
  • Expected behavior: signal changes state when buttons are pressed; not fixed
  • Out-of-range/stuck conditions: constant ~0 V (short to ground), constant ~5 V (short to battery/reference), no signal (open circuit), or no change with button actuation
  • When monitoring with scanner: input parameter should toggle between defined states when pressing each cruise control button

Diagnostic algorithm

  1. Confirm the DTC: Record freeze-frame data, read all related codes, clear codes and attempt to reproduce the fault with a scan tool monitoring the Cruise Multi-Function Input A parameter.
  2. Observe live data: Press each cruise control button and watch for the expected state changes. Note if the input is fixed or inconsistent.
  3. Inspect connectors and wiring: Visually inspect steering wheel harness, connector pins, and ground points for corrosion, damage, or loose terminals. Repair as needed.
  4. Backprobe and measure: With ignition ON (engine off), backprobe the multi-function switch connector. Measure DC voltage or resistance and verify the signal changes when buttons are pressed. Compare to expected behavior (signal should not be fixed).
  5. Isolate the switch: Disconnect the switch assembly or clockspring. If removing the switch changes the input behavior (e.g., signal goes open or to a different value), the switch or clockspring is likely at fault.
  6. Check continuity: With harness disconnected, check continuity from the switch connector to the control module input. Repair any open or shorted wiring.
  7. Test clockspring: If the wiring to the column is intact but steering-wheel functions fail, test or replace the clockspring per vehicle procedure.
  8. Repair wiring/connectors: Repair or replace damaged wiring, pins, or connectors. Use proper crimping/soldering and insulation to restore integrity.
  9. Module verification: If wiring and switch are good, verify the control module input circuit. Swap or bench-test modules only after confirming the harness and switch are good and following manufacturer procedures.
  10. Clear codes and retest: After repairs, clear codes and retest for proper function and absence of the DTC.

Likely causes

  • Worn or damaged steering wheel multi-function switch
  • Damaged clockspring causing constant/shorted signal
  • Connector corrosion or pin damage at the switch or control module
  • Wire chafing shorting to power/ground in the steering column harness
  • Faulty body control module or engine control module input (less common)

Fault status

⚠️ Status
Cruise Control Multi-Function Input A circuit stuck — signal constant or out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0577 P0562 P0563 P0571
10,723

The library contains 10,723 repair and diagnostic manuals. Choose a brand to open the full manual tree by year, model and trim.

ALFA ROMEO
89
AUDI
1,243
BMW
479
CADILLAC
206
CHEVROLET
917
CHRYSLER
193
DAEWOO
75
FIAT
26
GENESIS
207
HUMMER
138
HYUNDAI
371
ISUZU
229
JEEP
574
KIA
155
LAND ROVER
413
LEXUS
280
LINCOLN
166
MERCEDES-BENZ
856
MERCURY
296
MITSUBISHI
406
PORSCHE
136
TESLA
81
TOYOTA
2,209
TRIUMPH
131
VOLKSWAGEN
626
VOLVO
221
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0578

GWM P — Powertrain

- Cruise control system malfunction

Brand: GWM
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty cruise control multi-function switch (steering wheel button assembly)
  • Faulty clockspring (spiral cable) or broken internal steering-wheel wiring
  • Short to battery voltage or short to ground in the switch harness
  • Open circuit or intermittent wiring/connectors (corrosion, broken wire)
  • Faulty instrument cluster/BCM/ECM input circuit
  • Aftermarket steering-wheel accessory or improper installation

Symptoms

  • Cruise control will not engage or responds unpredictably
  • Cruise control switch/buttons do not register when pressed
  • Cruise indicator lamp may flash or not illuminate
  • Related steering-wheel buttons (if shared circuit) may not work
  • Possible stored DTCs for related input circuits or communication

What to check

  • Use a scan tool to read DTCs and live data for Cruise Multi-Function Input A while pressing each cruise button
  • Confirm the code is current and reproduce the fault before replacing parts
  • Visually inspect steering column, connector pins, and wiring harness for damage or corrosion
  • Backprobe the switch connector and measure voltage/changes while operating the switches
  • Check continuity between the switch connector and the module input with harness disconnected
  • Inspect/measure clockspring continuity and operation, especially if other steering-wheel functions fail

Signal parameters

  • Typical reference: a variable or discrete signal referenced to vehicle 5 V or ground (depends on vehicle)
  • Expected behavior: signal changes state when buttons are pressed; not fixed
  • Out-of-range/stuck conditions: constant ~0 V (short to ground), constant ~5 V (short to battery/reference), no signal (open circuit), or no change with button actuation
  • When monitoring with scanner: input parameter should toggle between defined states when pressing each cruise control button

Diagnostic algorithm

  1. Confirm the DTC: Record freeze-frame data, read all related codes, clear codes and attempt to reproduce the fault with a scan tool monitoring the Cruise Multi-Function Input A parameter.
  2. Observe live data: Press each cruise control button and watch for the expected state changes. Note if the input is fixed or inconsistent.
  3. Inspect connectors and wiring: Visually inspect steering wheel harness, connector pins, and ground points for corrosion, damage, or loose terminals. Repair as needed.
  4. Backprobe and measure: With ignition ON (engine off), backprobe the multi-function switch connector. Measure DC voltage or resistance and verify the signal changes when buttons are pressed. Compare to expected behavior (signal should not be fixed).
  5. Isolate the switch: Disconnect the switch assembly or clockspring. If removing the switch changes the input behavior (e.g., signal goes open or to a different value), the switch or clockspring is likely at fault.
  6. Check continuity: With harness disconnected, check continuity from the switch connector to the control module input. Repair any open or shorted wiring.
  7. Test clockspring: If the wiring to the column is intact but steering-wheel functions fail, test or replace the clockspring per vehicle procedure.
  8. Repair wiring/connectors: Repair or replace damaged wiring, pins, or connectors. Use proper crimping/soldering and insulation to restore integrity.
  9. Module verification: If wiring and switch are good, verify the control module input circuit. Swap or bench-test modules only after confirming the harness and switch are good and following manufacturer procedures.
  10. Clear codes and retest: After repairs, clear codes and retest for proper function and absence of the DTC.

Likely causes

  • Worn or damaged steering wheel multi-function switch
  • Damaged clockspring causing constant/shorted signal
  • Connector corrosion or pin damage at the switch or control module
  • Wire chafing shorting to power/ground in the steering column harness
  • Faulty body control module or engine control module input (less common)

Fault status

⚠️ Status
Cruise Control Multi-Function Input A circuit stuck — signal constant or out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0577 P0562 P0563 P0571
Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0578

HUMMER P — Powertrain

Cruise Control Related Malfunction

Brand: HUMMER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty cruise control multi-function switch (steering wheel button assembly)
  • Faulty clockspring (spiral cable) or broken internal steering-wheel wiring
  • Short to battery voltage or short to ground in the switch harness
  • Open circuit or intermittent wiring/connectors (corrosion, broken wire)
  • Faulty instrument cluster/BCM/ECM input circuit
  • Aftermarket steering-wheel accessory or improper installation

Symptoms

  • Cruise control will not engage or responds unpredictably
  • Cruise control switch/buttons do not register when pressed
  • Cruise indicator lamp may flash or not illuminate
  • Related steering-wheel buttons (if shared circuit) may not work
  • Possible stored DTCs for related input circuits or communication

What to check

  • Use a scan tool to read DTCs and live data for Cruise Multi-Function Input A while pressing each cruise button
  • Confirm the code is current and reproduce the fault before replacing parts
  • Visually inspect steering column, connector pins, and wiring harness for damage or corrosion
  • Backprobe the switch connector and measure voltage/changes while operating the switches
  • Check continuity between the switch connector and the module input with harness disconnected
  • Inspect/measure clockspring continuity and operation, especially if other steering-wheel functions fail

Signal parameters

  • Typical reference: a variable or discrete signal referenced to vehicle 5 V or ground (depends on vehicle)
  • Expected behavior: signal changes state when buttons are pressed; not fixed
  • Out-of-range/stuck conditions: constant ~0 V (short to ground), constant ~5 V (short to battery/reference), no signal (open circuit), or no change with button actuation
  • When monitoring with scanner: input parameter should toggle between defined states when pressing each cruise control button

Diagnostic algorithm

  1. Confirm the DTC: Record freeze-frame data, read all related codes, clear codes and attempt to reproduce the fault with a scan tool monitoring the Cruise Multi-Function Input A parameter.
  2. Observe live data: Press each cruise control button and watch for the expected state changes. Note if the input is fixed or inconsistent.
  3. Inspect connectors and wiring: Visually inspect steering wheel harness, connector pins, and ground points for corrosion, damage, or loose terminals. Repair as needed.
  4. Backprobe and measure: With ignition ON (engine off), backprobe the multi-function switch connector. Measure DC voltage or resistance and verify the signal changes when buttons are pressed. Compare to expected behavior (signal should not be fixed).
  5. Isolate the switch: Disconnect the switch assembly or clockspring. If removing the switch changes the input behavior (e.g., signal goes open or to a different value), the switch or clockspring is likely at fault.
  6. Check continuity: With harness disconnected, check continuity from the switch connector to the control module input. Repair any open or shorted wiring.
  7. Test clockspring: If the wiring to the column is intact but steering-wheel functions fail, test or replace the clockspring per vehicle procedure.
  8. Repair wiring/connectors: Repair or replace damaged wiring, pins, or connectors. Use proper crimping/soldering and insulation to restore integrity.
  9. Module verification: If wiring and switch are good, verify the control module input circuit. Swap or bench-test modules only after confirming the harness and switch are good and following manufacturer procedures.
  10. Clear codes and retest: After repairs, clear codes and retest for proper function and absence of the DTC.

Likely causes

  • Worn or damaged steering wheel multi-function switch
  • Damaged clockspring causing constant/shorted signal
  • Connector corrosion or pin damage at the switch or control module
  • Wire chafing shorting to power/ground in the steering column harness
  • Faulty body control module or engine control module input (less common)

Fault status

⚠️ Status
Cruise Control Multi-Function Input A circuit stuck — signal constant or out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0577 P0562 P0563 P0571
Repair manuals

Manual library for HUMMER

138

Browse 138 HUMMER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

HUMMER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0578

LAND ROVER P — Powertrain

Multifunctional Speed Control Input A circuit is stuck

Brand: LAND ROVER
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty cruise control multi-function switch (steering wheel button assembly)
  • Faulty clockspring (spiral cable) or broken internal steering-wheel wiring
  • Short to battery voltage or short to ground in the switch harness
  • Open circuit or intermittent wiring/connectors (corrosion, broken wire)
  • Faulty instrument cluster/BCM/ECM input circuit
  • Aftermarket steering-wheel accessory or improper installation

Symptoms

  • Cruise control will not engage or responds unpredictably
  • Cruise control switch/buttons do not register when pressed
  • Cruise indicator lamp may flash or not illuminate
  • Related steering-wheel buttons (if shared circuit) may not work
  • Possible stored DTCs for related input circuits or communication

What to check

  • Use a scan tool to read DTCs and live data for Cruise Multi-Function Input A while pressing each cruise button
  • Confirm the code is current and reproduce the fault before replacing parts
  • Visually inspect steering column, connector pins, and wiring harness for damage or corrosion
  • Backprobe the switch connector and measure voltage/changes while operating the switches
  • Check continuity between the switch connector and the module input with harness disconnected
  • Inspect/measure clockspring continuity and operation, especially if other steering-wheel functions fail

Signal parameters

  • Typical reference: a variable or discrete signal referenced to vehicle 5 V or ground (depends on vehicle)
  • Expected behavior: signal changes state when buttons are pressed; not fixed
  • Out-of-range/stuck conditions: constant ~0 V (short to ground), constant ~5 V (short to battery/reference), no signal (open circuit), or no change with button actuation
  • When monitoring with scanner: input parameter should toggle between defined states when pressing each cruise control button

Diagnostic algorithm

  1. Confirm the DTC: Record freeze-frame data, read all related codes, clear codes and attempt to reproduce the fault with a scan tool monitoring the Cruise Multi-Function Input A parameter.
  2. Observe live data: Press each cruise control button and watch for the expected state changes. Note if the input is fixed or inconsistent.
  3. Inspect connectors and wiring: Visually inspect steering wheel harness, connector pins, and ground points for corrosion, damage, or loose terminals. Repair as needed.
  4. Backprobe and measure: With ignition ON (engine off), backprobe the multi-function switch connector. Measure DC voltage or resistance and verify the signal changes when buttons are pressed. Compare to expected behavior (signal should not be fixed).
  5. Isolate the switch: Disconnect the switch assembly or clockspring. If removing the switch changes the input behavior (e.g., signal goes open or to a different value), the switch or clockspring is likely at fault.
  6. Check continuity: With harness disconnected, check continuity from the switch connector to the control module input. Repair any open or shorted wiring.
  7. Test clockspring: If the wiring to the column is intact but steering-wheel functions fail, test or replace the clockspring per vehicle procedure.
  8. Repair wiring/connectors: Repair or replace damaged wiring, pins, or connectors. Use proper crimping/soldering and insulation to restore integrity.
  9. Module verification: If wiring and switch are good, verify the control module input circuit. Swap or bench-test modules only after confirming the harness and switch are good and following manufacturer procedures.
  10. Clear codes and retest: After repairs, clear codes and retest for proper function and absence of the DTC.

Likely causes

  • Worn or damaged steering wheel multi-function switch
  • Damaged clockspring causing constant/shorted signal
  • Connector corrosion or pin damage at the switch or control module
  • Wire chafing shorting to power/ground in the steering column harness
  • Faulty body control module or engine control module input (less common)

Fault status

⚠️ Status
Cruise Control Multi-Function Input A circuit stuck — signal constant or out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0577 P0562 P0563 P0571
413

Browse 413 LAND ROVER manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

LAND ROVER

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email
Code

P0578

MERCEDES-BENZ P — Powertrain

Cruise Control Related Malfunction

Brand: MERCEDES-BENZ
Type: P — Powertrain
AI status
Completed
ready
Completed 100%
Page language: EN

Causes

  • Faulty cruise control multi-function switch (steering wheel button assembly)
  • Faulty clockspring (spiral cable) or broken internal steering-wheel wiring
  • Short to battery voltage or short to ground in the switch harness
  • Open circuit or intermittent wiring/connectors (corrosion, broken wire)
  • Faulty instrument cluster/BCM/ECM input circuit
  • Aftermarket steering-wheel accessory or improper installation

Symptoms

  • Cruise control will not engage or responds unpredictably
  • Cruise control switch/buttons do not register when pressed
  • Cruise indicator lamp may flash or not illuminate
  • Related steering-wheel buttons (if shared circuit) may not work
  • Possible stored DTCs for related input circuits or communication

What to check

  • Use a scan tool to read DTCs and live data for Cruise Multi-Function Input A while pressing each cruise button
  • Confirm the code is current and reproduce the fault before replacing parts
  • Visually inspect steering column, connector pins, and wiring harness for damage or corrosion
  • Backprobe the switch connector and measure voltage/changes while operating the switches
  • Check continuity between the switch connector and the module input with harness disconnected
  • Inspect/measure clockspring continuity and operation, especially if other steering-wheel functions fail

Signal parameters

  • Typical reference: a variable or discrete signal referenced to vehicle 5 V or ground (depends on vehicle)
  • Expected behavior: signal changes state when buttons are pressed; not fixed
  • Out-of-range/stuck conditions: constant ~0 V (short to ground), constant ~5 V (short to battery/reference), no signal (open circuit), or no change with button actuation
  • When monitoring with scanner: input parameter should toggle between defined states when pressing each cruise control button

Diagnostic algorithm

  1. Confirm the DTC: Record freeze-frame data, read all related codes, clear codes and attempt to reproduce the fault with a scan tool monitoring the Cruise Multi-Function Input A parameter.
  2. Observe live data: Press each cruise control button and watch for the expected state changes. Note if the input is fixed or inconsistent.
  3. Inspect connectors and wiring: Visually inspect steering wheel harness, connector pins, and ground points for corrosion, damage, or loose terminals. Repair as needed.
  4. Backprobe and measure: With ignition ON (engine off), backprobe the multi-function switch connector. Measure DC voltage or resistance and verify the signal changes when buttons are pressed. Compare to expected behavior (signal should not be fixed).
  5. Isolate the switch: Disconnect the switch assembly or clockspring. If removing the switch changes the input behavior (e.g., signal goes open or to a different value), the switch or clockspring is likely at fault.
  6. Check continuity: With harness disconnected, check continuity from the switch connector to the control module input. Repair any open or shorted wiring.
  7. Test clockspring: If the wiring to the column is intact but steering-wheel functions fail, test or replace the clockspring per vehicle procedure.
  8. Repair wiring/connectors: Repair or replace damaged wiring, pins, or connectors. Use proper crimping/soldering and insulation to restore integrity.
  9. Module verification: If wiring and switch are good, verify the control module input circuit. Swap or bench-test modules only after confirming the harness and switch are good and following manufacturer procedures.
  10. Clear codes and retest: After repairs, clear codes and retest for proper function and absence of the DTC.

Likely causes

  • Worn or damaged steering wheel multi-function switch
  • Damaged clockspring causing constant/shorted signal
  • Connector corrosion or pin damage at the switch or control module
  • Wire chafing shorting to power/ground in the steering column harness
  • Faulty body control module or engine control module input (less common)

Fault status

⚠️ Status
Cruise Control Multi-Function Input A circuit stuck — signal constant or out of range.
🟡 Repair difficulty: Medium
⏱️ Diagnostic time: 0.5-2.0 hours

Similar codes

P0577 P0562 P0563 P0571
856

Browse 856 MERCEDES-BENZ manuals: repair procedures, diagnostics, wiring diagrams, component locations, service data and Labor Times by year, model and trim.

MERCEDES-BENZ

Your experience will help others
+100 karma for a short comment :)
Keep it short and practical. Up to 500 characters.
Send to email

Report

Harassment or bullying behavior
Contains mature or sensitive content
Contains misleading or false information
Contains abusive or derogatory content
Contains spam, fake content or potential malware

Block Member?

Please confirm you want to block this member.

You will no longer be able to:

  • See blocked member's posts
  • Mention this member in posts
  • Invite this member to groups
  • Message this member
  • Add this member as a connection

Please note: This action will also remove this member from your connections and send a report to the site admin. Please allow a few minutes for this process to complete.

Report

You have already reported this .