2015 Acura TLX Base, 2.4L EngFACTORY OEM SERVICE PROCEDURE

Cruise Control Symptom Troubleshooting Index (Cruise Control)

Symptom  Diagnostic procedure  Also check for 
Cruise control cannot be set
  1. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
  2. Do the cruise control combination switch test .
  3. Do the cruise control input test .
  • Open circuit, loose or disconnected terminals: GRN, LT GRN, or YEL wire between the cruise control combination switch and the gauge control module
  • Faulty gauge control module
Cruise control can be set, but the cruise main indicator or the cruise control indicator do not come on
  1. Do the gauge control module self-diagnostic function procedure - Refer to: Gauges Self-Diagnostic Function (Without SH-AWD), or Gauges Self-Diagnostic Function (With SH-AWD) .
  2. Do the cruise control input test .

    Test the cruise control main switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
 Faulty gauge control module
Vehicle does not accelerate accordingly when the res/+ switch is pressed
  1. Do the cruise control combination switch test .
  2. Do the cruise control input test .

    Test the res/+ switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
  
Set speed does not cancel when the brake pedal is pressed
  1. Do the brake pedal position switch test .
  2. Do the cruise control input test .

    Test the brake pedal position switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
 Faulty brake pedal position switch
Set speed does not cancel when the cruise control main switch is pressed
  1. Do the cruise control combination switch test .
  2. Do the cruise control input test .

    Test the cruise control main switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
  
Set speed does not cancel when the cancel switch is pressed
  1. Do the cruise control combination switch test .
  2. Do the cruise control input test .

    Test the cruise control cancel switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
  
Set speed does not resume when the res/+ switch is pressed (with the cruise control main switch pressed on, and set speed temporarily canceled by pressing the brake pedal)
  1. Do the cruise control combination switch test .
  2. Do the cruise control input test .

    Test the res/+ switch signal input.

  3. Check the PGM-FI system - Refer to: How to Troubleshoot the Fuel and Emissions Systems (L4), or How to Troubleshoot the Dual Clutch Transmission (DCT), or How to Troubleshoot the Brake Booster Pressure Monitoring System (With Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, Without Auto Idle Stop System), or How to Troubleshoot the Fuel and Emissions Systems (V6, With Auto Idle Stop System) .
  
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Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • • You smell fuel, burning insulation, or see smoke.
  • • Brakes feel soft, pull hard to one side, or make grinding noises.
  • • The engine overheats, stalls repeatedly, or misfires under load.
  • • You are missing required tools, torque specs, or safe lifting equipment.
  • • You are not confident in the next step or safety outcome.

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