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Contents Wiring diagrams Section: Cruise Control Systems All sections

Cruise Control System Acura TSX I

Cruise Control Systems 9 illustrations ~1050 words

Scheme 1

Scheme 1: Component Location Index
Scheme 1: Component Location Index

Symptom Troubleshooting Index

SymptomDiagnostic procedureAlso check for
Cruise control cannot be setCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Check the No. 13 (20 A) fuse in the under-hood fuse/ relay box, and the No. 18(15 A) fuse in the under-dash fuse/relay box. Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Poor ground G501
Cruise control can be set, but the cruise main indicator does not come onCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the gauge control module self-diagnostic function procedure (see SELF-DIAGNOSTIC FUNCTION ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control main switch signal input.Faulty gauge control module
Cruise control can be set, but the cruise control indicator does not come onCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the gauge control module self-diagnostic function procedure (see SELF-DIAGNOSTIC FUNCTION ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control indicator signal input.Faulty gauge control module
Vehicle does not decelerate or accelerate accordingly when the set/ decel or resume/accel switch is pressedCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control set/decel and resume/accel switch signal inputs. Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Open circuit, loose or disconnected terminals: LT GRN or GRY wire
Set speed does not cancel when the brake pedal is pressedCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the brake pedal position switch signal input. Do the brake pedal position switch test (see BRAKE PEDAL POSITION SWITCH TEST ).Short in the WHT/BLK wire Faulty brake pedal position switch
Set speed does not cancel (engine rpm stays high) when the clutch pedal is pressed (M/T)Check for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the clutch pedal position switch signal input. Do the clutch pedal position switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Short in the LT BLU wire Faulty clutch pedal position switch
Set speed does not cancel when the cruise control main switch is turned offCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control main switch signal input. Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Short to ground in the LT GRN wire
Set speed does not cancel when the cancel switch is pressedCheck for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control cancel switch signal input. Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Open circuit, loose or disconnected terminals: LT GRN or GRY wire
Set speed will not resume when the resume/accel switch is pressed (with the cruise control main switch turned on, and set speed temporarily canceled by pressing the brake pedal)Check for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Check the brake pedal position switch adjustment (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control resume/accel switch signal input. Test the brake pedal position switch signal input. Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Open circuit, loose or disconnected terminals: LT GRN wire Faulty brake pedal position switch
Set speed will not resume when the resume/accel switch is pressed (with the cruise control main switch turned on, and set speed temporarily canceled by pressing the clutch pedal) (M/T)Check for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ) and body DTCs (see HOW TO CHECK FOR DTCS WITH THE HONDA DIAGNOSTIC SYSTEM (HDS) ). Check the clutch pedal position switch adjustment (see CLUTCH PEDAL, CLUTCH PEDAL POSITION SWITCH, AND CLUTCH INTERLOCK SWITCH ADJUSTMENT ). Do the cruise control input test (see CRUISE CONTROL INPUT TEST ). Test the cruise control resume/accel switch signal input. Test the clutch pedal position switch signal input. Do the cruise control combination switch test (see CRUISE CONTROL COMBINATION SWITCH TEST/REPLACEMENT ).Open circuit, loose or disconnected terminals: LT BLU wire Faulty clutch pedal position switch

SYMPTOM TROUBLESHOOTING CHART

Scheme 2

Scheme 2: Circuit Diagram
Scheme 2: Circuit Diagram

Cruise Control Input Test

  1. Connect the Honda Diagnostic System (HDS) to the data link connector (DLC) (see «HOW TO USE THE HDS (HONDA DIAGNOSTIC SYSTEM)»(/acura/tsx/i-2003-2008/remont/auxiliary-emission-control-systems/#fuel-and-emissions-systems__how-to-use-the-hds-honda) ).
  2. Turn the ignition switch ON (II).
  3. '07-08 models: Make sure the HDS communicates with the vehicle and the engine control module (ECM)/ powertrain control module (PCM). If it doesn't communicate, troubleshoot the DLC circuit (see «'07-08 MODELS»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
  4. Go to B-CAN System Diagnosis Test Mode A, and check for DTCs (see «TROUBLESHOOTING - B-CAN SYSTEM DIAGNOSIS TEST MODE A»(/acura/tsx/i-2003-2008/remont/communication-devices/#multiplex-integrated-control-system__troubleshooting-b-can-system-diagnosis-test) ).
  5. Go to PGM-FI, and check for DTCs (see «PGM-FI SYSTEM»(/acura/tsx/i-2003-2008/remont/testing-diagnostics/#pgm-fi-system) ).
  6. Do the following tests while monitoring parameters in the PGM-FI DATA LIST with the HDS. NOTE: Intermittent failures are often caused by loose circuit connections. While monitoring cruise control inputs, flex their circuits, and note if any of the test results change. PGM-FI DATA LIST Signal to be tested Test condition Parameter: Desired result Possible cause if result is not obtained Brake pedal position switch signal Brake pedal pressed, then released CRUISE BRAKE SW should indicate OFF when the brake pedal is pressed and ON when the brake pedal is released. Faulty brake pedal position switch Blown No.18 (15 A) fuse in the under-dash fuse/relay box An open in the wire between the ECM/PCM and the brake pedal position switch A wire shorted to ground between the ECM/PCM and the brake pedal position switch Clutch pedal position switch signal (M/T) Clutch pedal pressed, then released SHIFT/CLUTCH SW should indicate OFF when the clutch pedal is pressed and ON when the clutch pedal is released. Faulty clutch pedal position switch An open in the wire between the ECM and the clutch pedal position switch A wire shorted to ground between the ECM and the clutch pedal position switch Poor ground G501 Transmission range switch signal (A/T) Shift lever in D, M, or D3 position SHIFT/TRANS RANGE SW should indicate OFF in P, R, and N position and ON in D, M, and D3. Faulty transmission range switch An open in the wire between the PCM and the transmission range switch A wire shorted to ground between the PCM and the transmission range switch Poor ground G101 Cruise control main switch signal Cruise control main switch ON and OFF CRUISE MASTER SW should indicate ON when the cruise control main switch is turned ON and OFF when the cruise control main switch is turned OFF. Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch An open in the wire between the cruise control combination switch and the ground Set switch signal Set/decel switch pressed and released CRUISE SET SW should indicate ON when the set/decel switch is pressed and OFF when the set/decel switch is released. Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch Resume switch signal Resume/accel pressed and released CRUISE RESUME SW should indicate ON when the resume/accel is pressed and OFF when the resume/accel is released. Faulty cruise control combination switch An open in the wire between the gauge control module and the cruise control combination switch A wire shorted to ground between the gauge control module and the cruise control combination switch Cancel switch signal Cancel switch pressed and released CRUISE CANCEL SW should indicate ON when the cancel switch is pressed and OFF when the cancel switch is released. Faulty cruise control combination switch Cruise control indicator signal Start the engine, turn the cruise control main switch on and drive the vehicle above 25 mph (40 km/h) with the cruise control set and cancel the cruise control CRUISE LIGHT should indicate ON when the cruise control is set and OFF when the cruise control is canceled. Faulty gauge control module

'04 model

SRS components are located in this area. Review the SRS component location index (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ) in the SRS before testing the solenoid.

Scheme 3

Scheme 3: '04 model
Scheme 3: '04 model

Scheme 4

Scheme 4
Scheme 4
  1. Remove the driver's airbag (see «DRIVER'S AIRBAG REPLACEMENT»(/acura/tsx/i-2003-2008/remont/airbag/#srs-supplemental-restraint-system) ).
  2. Remove the two screws, then disconnect the connector, and remove the switch.
  3. Check for continuity between the terminals in each switch position according to (Scheme 4). If there is continuity, and it matches (Scheme 4), but switch failure occurred on the cruise control input test, check and repair the wire harness on the switch circuit. If there is no continuity in one or both positions, replace the switch.

'05-08 models

SRS components/are located in this area. Review the SRS component location index (see COMPONENT LOCATION INDEX ) and \precautions and procedures (see PRECAUTIONS AND PROCEDURES ) in the SRS before testing the solenoid.

Scheme 5

Scheme 5: '05-08 models
Scheme 5: '05-08 models

Scheme 6

Scheme 6
Scheme 6

Scheme 7

Scheme 7
Scheme 7
  1. Remove the driver's airbag (see «DRIVER'S AIRBAG REPLACEMENT»(/acura/tsx/i-2003-2008/remont/airbag/#srs-supplemental-restraint-system) ).
  2. Check for continuity between the terminals according to the table. If there is continuity, and it matches the table, but switch failure occurred on the cruise control input test, check and repair the wire harness on the switch circuit. If there is no continuity in one or both positions, replace the switch. Without navigation With navigation

Scheme 8

Scheme 8: Clutch Pedal Position Switch Test
Scheme 8: Clutch Pedal Position Switch Test

Scheme 9

Scheme 9
Scheme 9
  1. Disconnect the 3P connector from the clutch pedal position switch.
  2. Check for continuity between the terminals according to (Scheme 9). If the continuity is not as specified, replace the clutch pedal position switch. If OK, install the clutch pedal position switch, and adjust the pedal height (see «CLUTCH PEDAL, CLUTCH PEDAL POSITION SWITCH, AND CLUTCH INTERLOCK SWITCH ADJUSTMENT»(/acura/tsx/i-2003-2008/remont/clutches-manual-hydraulic/#manual-transmission-clutch__clutch-pedal-clutch-pedal-position-switch) ).