Cruise Control Acura RSX I

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Symptom Troubleshooting Index

SYMPTOM TROUBLESHOOTING INDEX

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1. Start the engine.
2. Turn on the cruise control main switch, then drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set. Does the cruise control operate? YES - Go to step 3. NO - Check the cruise control unit (see «CRUISE CONTROL UNIT INPUT TEST»(/acura/rsx/i-2001-2004/remont/cruise-control-systems/#cruise-control) ) or cruise control actuator (see «CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT»(/acura/rsx/i-2001-2004/remont/cruise-control-systems/#cruise-control) ).
3. Turn the ignition switch OFF.
4. 2005-2006 models: Connect the HDS to the data link connector (DLC) (see step 2 on «IF THE MIL (MALFUNCTION INDICATOR LAMP) HAS COME ON»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems) ). Select SCS mode using the HDS.
5. Disconnect PCM connector D (17P) and cruise control unit 14P connector.
6. Check for continuity between PCM connector terminal D12 and body ground. Is there continuity? YES - Repair a short to ground in the wire between PCM connector terminal D12 and the cruise control unit 14P connector terminal No. 8. NO - Go to step 7.
7. Reconnect PCM connector D (17P) and the cruise control unit 14P connector.
8. Connect a voltmeter between cruise control unit 14P connector terminal No. 8 and body ground. Test-drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter. Is there about 1 V? YES - Go to step 9. NO - Replace the cruise control unit.
9. Connect a voltmeter between PCM connector terminal D12 and body ground. Drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set, and watch the voltmeter. Is there about 1 V? YES - Check for loose connectors of the BLU/ORN wire between the cruise control unit and the PCM. If the wire is OK, update the PCM if it does not have the latest software (see «HOW TO UPDATE THE ECM/PCM»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-update-the-ecmpcm) ), or substitute a known-good PCM (see «HOW TO SUBSTITUTE THE ECM/PCM (2002-2004 MODELS)»(/acura/rsx/i-2001-2004/remont/auxiliary-emission-control-systems/#fuel-system-emissions-systems__how-to-substitute-the-ecmpcm-2002-2004) ), and recheck. If the system works properly, replace the original PCM (see «ECM/PCM REPLACEMENT»(/acura/rsx/i-2001-2004/remont/testing-diagnostics/#pgm-fi-system) ). NO - Repair an open in the wire between PCM connector terminal D12 and the control unit 14P connector terminal No. 8.

SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ) and precautions and procedures (see PRECAUTIONS AND PROCEDURES ), before doing repairs or service.

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1. Disconnect the 14P connector from the control unit.
2. Inspect the connector and socket terminals to make sure they are all making good contact. If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system. If the terminals look OK, go to step 3.
3. With the 14P connector disconnected, do these input tests. If a test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the cruise control unit may be faulty. Substitute a know-good cruise control unit and retest. If the system works properly, replace the cruise control unit. TEST CONDITION Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 1 BRN/WHT Connect battery power Check the operation of the magnetic clutch: Clutch should click and output link should be locked. Faulty actuator Poor ground(G451) An open in the wire Short to ground 2 BLU Ignition switch ON (II), cruise control main switch ON and brake pedal pressed, then released Check for voltage to ground: There should be 0 V with the pedal pressed and battery voltage with the pedal released. Faulty brake pedal position switch An open in the wire Open in cruise control main switch Blown No. 4 (10 A) fuse in the under-dash fuse/relay box 3 BLK Under all conditions Check for continuity to ground: There should be continuity. Poor ground(G401) An open in the wire 4 BLK/ORN Ignition switch ON (II) Check for voltage to ground: There should be battery voltage. Blown No. 4 (10 A) fuse in the under-dash fuse/relay box An open in the wire 5 WHT/BLK Brake pedal pressed, then released Check for voltage to ground: There should be battery voltage with the pedal pressed, and 0 V with the pedal released. Blown No. 7 (15 A) fuse in the underhood fuse/relay box Faulty brake pedal position switch An open in the wire 6 GRY/RED Set/decel switch pressed Check for voltage to ground: There should be battery voltage. When testing terminal No. 6, there should be no voltage on terminal No. 7. Blown No. 7 (15 A) fuse in the underhood fuse/relay box Faulty horn relay Faulty cruise control set/decel, resume/accel, cancel switch Faulty cable reel An open in the wire 7 LT GRN/BLK Resume/accel switch pressed Check for voltage to ground: There should be battery voltage. When testing terminal No. 7, there should be no voltage on terminal No. 6. 9 BRN Connect battery power to the BRN terminal and ground to the BRN/YEL terminal Check the operation of the actuator motor: You should be able to hear the motor. Faulty actuator An open in the wires Poor ground (G452) 11 BRN/YEL 10 BLU/YEL Ignition switch ON (II) Attach to ground: Cruise control indicator in the gauge assembly should come on. Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box Faulty gauge assembly An open in the wire 12 BLU/WHT Ignition switch ON (II) and cruise control main switch ON; raise the front of the vehicle, and rotate one wheel slowly while holding the other wheel NOTE: This input test must be done with the UP connector reconnected. Check for voltage between the BLU/WHT and ground terminal: There should be 0-5 V or more repeatedly. Faulty PCM [A/T) Faulty VSS (M/T) An open in the wire Short to ground 13 LT GRN Ignition switch ON (II) and cruise control main switch ON Check for voltage to ground: There should be battery voltage. Blown No. 4 (10 A) fuse in the under-dash fuse/relay box Faulty cruise control main switch An open in the wire 14 LT BLU A/T: Shift lever in D or D3 M/T: Clutch pedal released Check for continuity to ground: There should be continuity. NOTE: There should be no continuity when the clutch pedal is pressed or when the shift lever is in other positions. Faulty transmission range switch Faulty clutch pedal position switch Poor ground (M/T: G4O2, A/T: G1O1) An open in the wire 8 BLU/ORN Reconnect the cruise control unit 14P connector, start the engine turn the cruise control main switch ON and drive the vehicle at speeds over 25 mph (40 km/h) with the cruise control set Check for voltage to ground: There should be about 1 V. Faulty cruise control unit Short to ground An open in the wire

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1. Gently pry up on the driver's switch panel (A) to release the hooks (B), then pull out the panel.
2. Release the clips, and push the cruise control main switch (A) out of the panel, then disconnect the 5P connector (B) from the cruise control main switch.
3. Check for continuity between the terminals in each switch position according to the table. If the continuity is not as specified, replace the illumination bulbs (A) or the switch.

SRS components are located in this area. Review the SRS component locations (see COMPONENT LOCATION INDEX ), and the precautions, and procedures (see PRECAUTIONS AND PROCEDURES ), before performing repairs or service.

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1. Remove the two screws, then remove the switch.
2. Check for continuity between the terminals in switch position according to the table. If there is continuity, and it matches the table, but switch failure occurred on the cruise control unit 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.

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1. Disconnect the 4P connector (A) from the cruise control actuator (B).
2. Remove the cover (A), and check the output linkage (B) for smooth movement.
3. Connect the battery power to the No. 2 terminal and ground to the No. 1 terminal.
4. Check for a clicking sound from the magnetic clutch. The output linkage should be locked.
5. If the output linkage is not locked, replace the cruise control actuator assembly.
6. Check the operation of the actuator motor in each output linkage position according to the table. You should be able to hear the motor. OUTPUT LINKAGE POSITION Battery power polarities Output linkage position (+) (-) FULL CLOSE MIDDLE POSITION FULL OPEN No. 4 Terminal No. 3 Terminal The motor runs. The motor runs. The motor stops. No. 3 Terminal No. 4 Terminal The motor stops. The motor runs. The motor runs.

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1. K20A3 engine: Remove the throttle cover (A), fully open the cruise control link by hand, then remove the cruise control cable (B) from link. Loosen the locknut (C), and remove the cable from the bracket.
2. K20A2, K20Z1 engines: Fully open the cruise control link by hand, then remove the cruise control cable (A) from the link. Loosen the locknut (B), and remove the cable from the bracket.
3. Remove the cowl cover (see «COWL COVER REPLACEMENT»(/acura/rsx/i-2001-2004/remont/exteriorinterior-trim/#exterior-trim) ).
4. Disconnect the 4P connector, and remove the two bolts securing the cruise control actuator.
5. Remove the actuator cover (A), then remove the actuator cable (B) from the cruise control actuator.
6. Remove the bracket from the cruise control actuator.
7. Install in the reverse order of removal, and adjust the free play at the throttle linkage after connecting the actuator cable.

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1. Check that the actuator cable (A) moves smoothly with no binding or sticking.
2. Measure the amount of movement of the output linkage (B) until the engine speed starts to increase. At first, the output linkage should be located at the fully closed position (C). The free play (D) should be 3.75+/-0.5 mm (0.15+/-0.02 in.).
3. If the free play is not within specifications, loosen the locknut, and turn the adjusting nut until the free play is as specified, then retighten the locknut.

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1. Disconnect the 2P connector from the clutch pedal position switch (A).
2. Remove the clutch pedal position switch.
3. Check for continuity between the terminals according to the table. 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/rsx/i-2001-2004/remont/clutches-manual-hydraulic/#clutch-system__clutch-pedal-clutch-pedal-position-switch) ).

See also:
• GENERAL TROUBLESHOOTING INFORMATION
• BRAKE PEDAL POSITION SWITCH TEST
• BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH ADJUSTMENT
• CLUTCH PEDAL, CLUTCH PEDAL POSITION SWITCH, AND CLUTCH INTERLOCK SWITCH ADJUSTMENT
• TRANSMISSION RANGE SWITCH TEST
• ECM/PCM REPLACEMENT
• SELF-DIAGNOSTIC FUNCTION
• HOW TO UPDATE THE ECM/PCM
• HOW TO SUBSTITUTE THE ECM/PCM (2002-2004 MODELS)
• COMPONENT LOCATION INDEX
• COWL COVER REPLACEMENT
• CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT