Honda Civic/CRX/del Sol 1984-1995 Repair Guide

General Description

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See Figures 1 and 2

The cruise control system found on some 1988 and later Civic series models maintains the vehicle speed at a setting selected by the driver by means of mechanical, electrical, and vacuum operated devices.

The cruise control unit receives command signals from the cruise control main switch and the cruise control set/resume switch. The control unit also receives information about operating conditions from the brake switch, the distributor, speed sensor, the clutch switch with manual transaxle, or the shift lever position switch with automatic transaxle. The cruise control unit, in turn, sends operational signals to the devices that regulate the throttle position. The throttle position maintains the selected vehicle speed. The cruise control compares the actual speed of the vehicle to the selected speed. Then, the control unit uses the result of that comparison to open or close the throttle.

The control unit will disengage the instant the driver depresses the brake pedal. The brake switch sends an electronic signal to the control unit when the brake pedal is depressed; the control unit responds by allowing the throttle to close. The shift lever position switch (automatic transaxle) or the clutch switch (manual transaxle) sends a disengage signal input to the control unit that also allows the throttle to close.



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Fig. Fig. 1: Cruise control component locations-1988-91



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Fig. Fig. 2: Cruise control component locations-1992-95

SERVICE PRECAUTIONS





Never disconnect any electrical connection with the ignition switch ON unless instructed to do so in a test.
 
Always wear a grounded wrist static strap when servicing any control module or component labeled with a Electrostatic Discharge (ESD) sensitive device symbol.
 
Avoid touching module connector pins.
 
Leave new components and modules in the shipping package until ready to install them.
 
Always touch a vehicle ground after sliding across a vehicle seat or walking across vinyl or carpeted floors to avoid static charge damage.
 
Never allow welding cables to lie on, near or across any vehicle electrical wiring.
 
Do not allow extension cords for power tools or drop lights to lie on, near or across any vehicle electrical wiring.
 
Do not operate the cruise control or the engine with the drive wheels off the ground unless specifically instructed to do so by a test procedure.
 

COMPONENT TESTING



Slip Ring
1988-91 ONLY

See Figure 3

  1. Remove the steering wheel. Remove the steering column covers.
  2.  
  3. Disconnect the 3-pin connector from the main wiring harness.
  4.  
  5. Using a suitable ohmmeter and while turning the slip ring, check that there is continuity between the blue/red and D terminal.
  6.  
  7. Check for continuity between the Light Green/Red and F terminal.
  8.  
  9. If there is no continuity, replace the slip ring assembly.
  10.  



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Fig. Fig. 3: Testing the cruise control slip ring-1988-91

Actuator Assembly
  1. Disconnect 4-pin connector from actuator solenoid.
  2.  
  3. Check that the output linkage moves smoothly.
  4.  
  5. Connect the a lead wire from the positive battery post to the D terminal and the negative to the A terminal.
  6.  
  7. Check for a clicking sound of the magnetic clutch and that the output linkage is locked. The motor should be heard running at this point.
  8.  
  9. If the output linkage is not locked, replace the actuator assembly.
  10.  

Shift Position Console Switch
1988-91 MODELS

See Figure 4

  1. Remove the front console, then disconnect the 10-pin connector from the console switch.
  2.  
  3. Check for continuity between the terminals in each switch position as follows:
    1. Shift position in 2-there should be continuity between terminals 1 and 7.
    2.  
    3. Shift position in S-there should be continuity between terminals 1 and 7.
    4.  
    5. Shift position in D-there should be continuity between terminals 1 and 7.
    6.  
    7. Shift position in N-there should be no continuity between terminals 1 and 7.
    8.  
    9. Shift position in R-there should be no continuity between terminals 1 and 7.
    10.  
    11. Shift position in P-there should be no continuity between terminals 1 and 7.
    12.  

  4.  

Move the lever without touching the push knob to each position and check for continuity within the range of free play of the shift lever. If there is no continuity within the range of free play, adjust the installation position of the console switch.



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Fig. Fig. 4: Shift position console test-1988-91 models

1992-95 MODELS

See Figure 5

  1. Remove the center console, then disconnect the 14-pin connector from the console switch.
  2.  
  3. Check for continuity between the terminals in each switch position as follows:
    1. Shift position in 2-there should be continuity between terminals 7 and 13.
    2.  
    3. Shift position in S-there should be continuity between terminals 7 and 13.
    4.  
    5. Shift position in D-there should be continuity between terminals 7 and 13.
    6.  
    7. Shift position in N-there should be no continuity between terminals 7 and 13.
    8.  
    9. Shift position in R-there should be no continuity between terminals 7 and 13.
    10.  
    11. Shift position in P-there should be no continuity between terminals 7 and 13.
    12.  

  4.  

Move the lever without touching the push knob to each position and check for continuity within the range of free play of the shift lever. If there is no continuity within the range of free play, adjust the installation position of the console switch.



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Fig. Fig. 5: Shift position console test-1992-95

Set/Resume Switch
1988-91 MODELS

See Figure 6

  1. Remove the steering wheel assembly. Disconnect the 3-pin connector.
  2.  
  3. Using a suitable ohmmeter, check for continuity between the terminals in each switch position.
  4.  
  5. If there is no continuity in 1 or some switch positions, repair or replace the set/resume switch.
  6.  
  7. If all of the continuity checks are good, check the slip ring assembly.
  8.  



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Fig. Fig. 6: Set/Resume switch test-1988-91 models

1992-95 MODELS

See Figures 7 and 8

This procedure requires deactivating the SRS (air bag). Read the SRS precautions found in this section before proceeding.

  1. Disconnect both the negative and positive cable from the battery and disable the SRS system.
  2.  
  3. Make sure the road wheels are pointed straight ahead.
  4.  
  5. Remove the dashboard lower cover and knee bolster and disconnect the 6-pin harness that attaches the cable reel to the SRS main harness. Connect Honda Test Harness C (part No. 07LAZ-SL40300) only to the cable reel harness.
  6.  
  7. Using test harness C, test with the SET switch depressed for continuity between terminals 3 and 2. Then with the switch on RESUME, test for continuity between terminals 3 and 1. If there is continuity between the described terminals, the switch is OK.
  8.  
  9. If there is no continuity as described, remove the cover to the SET/RESUME switch as shown in the accompanying drawing.
  10.  
  11. Remove the two screws (as shown in drawing) and remove the switch.
  12.  
  13. With the switch on SET, check for continuity between A, A' and C. With the switch on RESUME, check for continuity between A, A' and B. If on one or both positions there is no continuity, replace the switch. If there is continuity as described, replace the cable reel.
  14.  



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Fig. Fig. 7: Set/Resume switch test-1992-95 models



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Fig. Fig. 8: Set/Resume switch removal and terminal identification-1992-95 models

Brake Light Switch
1984-91 MODELS

See Figure 9

  1. Disconnect the 4 prong connector from the brake light switch.
  2.  
  3. Check for continuity between terminals A and B with the pedal released.
  4.  
  5. Check for continuity between terminals C and D with the pedal depressed.
  6.  
  7. If the switch fails either test, check the pedal height adjustment and/or replace the switch.
  8.  



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Fig. Fig. 9: Brake light switch test-1988-91

1992-95 MODELS

See Figure 10

  1. Disconnect the 2-prong or 4-prong connector from the brake light switch.
  2.  
  3. Check for continuity between terminals B and C with the pedal depressed. If there is no continuity, replace the switch or adjust pedal height. If there is continuity, but the brake lights do not go on (and you already checked the bulbs and fuses) check for a poor ground or an open in the WHT/GRN or GRN/WHT wire.
  4.  



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Fig. Fig. 10: Brake light switch test-1992-95

Clutch Switch
1984-91 MODELS

See Figure 11

  1. Disconnect the 2-prong connector from the clutch switch.
  2.  
  3. Check for continuity between terminals A and B with the clutch pedal released.
  4.  
  5. If there is no continuity, check the pedal height adjustment and/or replace the switch.
  6.  



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Fig. Fig. 11: Clutch switch test-1984-91

1992-95 MODELS

See Figure 12

  1. Disconnect the 2-prong connector from the clutch switch.
  2.  
  3. Check for continuity between terminals A and B with the clutch pedal pushed.
  4.  
  5. If there is no continuity, check the pedal height adjustment and/or replace the switch.
  6.  



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Fig. Fig. 12: Clutch switch test-1992-95

COMPONENT REPLACEMENT



Actuator Cable

See Figures 13 and 14

ADJUSTMENT
  1. Check that actuator cable operates smoothly with no binding or sticking.
  2.  
  3. Start engine and warm it to normal operating temperature (radiator fan comes on twice).
  4.  
  5. Measure amount of movement of actuator rod until cable pulls on accelerator lever (engine speed starts to increase). Free-play should be 0.37-0.49 in. (9.5-12.5mm).
  6.  
  7. If free play is not within specifications, loosen locknut and turn adjusting nut as required.
  8.  
  9. Retighten locknut and recheck free-play.
  10.  
  11. Drive the vehicle to make sure that vehicle speed is held within 2 mph of set speed.
  12.  

If necessary, check throttle cable free-play, then recheck actuator rod free-play.



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Fig. Fig. 13: Actuator cable adjustment



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Fig. Fig. 14: Cruise control actuator test

REPLACEMENT
  1. Pull back boot and loosen locknut, then disconnect cable from bracket.
  2.  
  3. Disconnect cable end from actuator rod.
  4.  
  5. Disconnect 4-pin connector.
  6.  
  7. Pull ventilation hose from grommet.
  8.  
  9. Disconnect vacuum hose from check valve.
  10.  
  11. Remove the two mount bolts and actuator with bracket.
  12.  
  13. If necessary, disconnect cable end from linkage over accelerator pedal.
  14.  
  15. To install, replace actuator, with bracket, re-bolt, replace vacuum hose, 4-pin connector and actuator cable.
  16.  
  17. Adjust free-play at the actuator rod after connecting cable.
  18.  
  19. Installation is the reverse of removal.
  20.  

Main Switch
  1. Disconnect the negative battery cable.
  2.  
  3. Carefully pry out the cruise main switch/sunroof switch from the instrument panel. Be sure not to damage the switch or the instrument panel when prying out the switch.
  4.  
  5. Disconnect the switch connectors from the switch.
  6.  
  7. Installation is the reverse order of the removal procedure.
  8.  

Set/Resume Switch
EXCEPT AIR BAG EQUIPPED VEHICLES

See Figure 15

  1. Disconnect the negative battery cable. Remove steering wheel.
  2.  
  3. Disconnect the 3-pin connector. Separate the upper and under covers by removing the 4 screws. Disconnect the 1-pin connector.
  4.  
  5. Remove the two screws and set/resume switch from the steering wheel.
  6.  
  7. Installation is the reverse order of the removal procedure.
  8.  



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Fig. Fig. 15: Set/Resume switch replacement

AIR BAG EQUIPPED VEHICLES

WARNING
All SRS wire harnesses are covered with a yellow insulation. Read the SRS precautions found in this section and install the short connectors as described in that section.

  1. Disconnect both the negative and positive battery cables and disable the SRS system.
  2.  
  3. Make sure the road wheels are turned straight ahead.
  4.  
  5. Remove the switch cover by carefully prying between the cover and the switch.
  6.  
  7. Remove the two screws and remove the switch.
  8.  
  9. Installation is the reverse of the removal procedure.
  10.  

Slip Ring
1988-91 ONLY

See Figure 16

  1. Disconnect the negative battery cable.
  2.  
  3. Remove the steering wheel.
  4.  
  5. Disconnect the three pin connector from the main harness.
  6.  
  7. Remove the three screws that retain the slip ring and remove the slip ring.
  8.  
  9. Install the components in reverse order. Tighten the steering wheel self-locking nut to 36 ft. lbs. (50 Nm).
  10.  



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Fig. Fig. 16: Slip ring replacement-1988-91 only

 
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