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Home >> Oldsmobile >> 2000 >> Intrigue GL >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> System Tests >> Cruise Control Inoperative/Malfunctioning (Using Tester J42958)
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Cruise Control Inoperative/Malfunctioning (Using Tester J42958)

NOTE: The following test is specifically designed for cruise control tester (J42958) and GM Tech II scan tool. Generic test equipment may not be able to perform all necessary test functions.
  1. Connect cruise control tester (J42958) between cruise control module and cruise control module harness connector. Turn ignition switch to ON position. If IGNITION LED illuminates, go to next step. If IGNITION LED does not illuminate, go to step  19 ,
  2. If BRAKE/TCC LED on cruise control tester is illuminated, go to next step. If BRAKE/TCC LED is not illuminated, go to step  21 .
  3. If BRAKE LIGHTS LED on cruise control tester is illuminated, go to next step. If BRAKE LIGHTS LED is not illuminated, go to step  22 .
  4. Press and release brake pedal. If BRAKE/TCC LED turns off when pedal is pressed, go to next step. If BRAKE/TCC LED remains illuminated, go to step  24 .
  5. Turn cruise control main switch to ON position. Leave cruise control on unless instructed otherwise. If ON/OFF and INHIBIT/ENABLE LEDs on cruise control tester illuminate, go to next step. If ON/OFF and INHIBIT/ENABLE LEDs do not illuminate, go to step  26 .
  6. If CRUISE LAMP LED on cruise control tester illuminates, go to next step. If CRUISE LAMP LED does not illuminate, go to step  27 .
  7. Press and release SET/COAST switch. If SET/COAST LED on cruise control tester illuminates when switch is pressed and goes off when switch is released, go to next step. If SET/COAST LED does not function as described, go to step  30 .
  8. Press and release RESUME/ACCEL switch. If RESUME/ACCEL LED on cruise control tester illuminates when switch is pressed and goes off when switch is released, go to next step. If RESUME/ACCEL LED does not function as described, go to step  31 .
  9. Perform the following operations in the listed sequence:
    • Press and release INHIBIT OVERRIDE button on cruise control tester.
    • Press and release BRAKE button on cruise control tester.
    • Press and release SET/COAST button on cruise control tester.
    If CRUISE ENGAGE LED illuminates continuously after SET/COAST button was pressed and released, go to next step. If CRUISE ENGAGE LED does not illuminate as described, go to step  19 .
  10. Observe throttle lever at throttle body. Press RES/ACCEL button on cruise control tester for 5 seconds then release. If throttle lever moves toward full throttle position then returns to one-half throttle, go to next step. If throttle lever does not function as described, go to step  35 .
  11. While observing throttle lever at throttle body, press SET/COAST button on cruise control tester for 5 seconds then release. If throttle lever moves toward closed position then returns to about one-half throttle, go to next step. If throttle lever does not function as described, go to step  35 .
  12. Quickly press and release (tap) RESUME/ACCEL button on cruise control tester 3 times. Press and release BRAKE button tester. If CRUISE ENGAGE LED illuminates and throttle lever moves to closed position, go to next step. If CRUISE ENGAGE LED and throttle lever does not respond as described, go to step  35 .
  13. Raise and support vehicle so drive wheels may be rotated. Block one drive wheel. Turn ignition switch to ON position. Set gear selector in DRIVE position. Observe VSS LED on cruise control tester while rotating unblocked drive wheel. If VSS LED flashes during wheel rotation, go to next step. If VSS LED does not flash, go to step  28 .
  14. Check cruise control module harness connector. If Dark Green wire is attached to terminal "H", go to next step. If no wire is attached to terminal "H", go to step  18 .
  15. Following manufacturer's instructions, connect GM Tech II scan tool. Turn ignition switch to ON position. Select POWERTRAIN SPECIAL FUNCTIONS and then OUTPUT CONTROLS for CRUISE INHIBIT. Observe cruise control tester INHIBIT ENABLE LED. If INHIBIT ENABLE LED dims during enable command, go to next step. If INHIBIT ENABLE LED does not dim, go to step  32 .
  16. Disconnect cruise control tester from wiring harness connector. Reconnect harness to cruise control module. Road test vehicle at speeds greater than 25 MPH. Operate cruise control. Using scan tool, monitor CRUISE INHIBIT status. If scan tool displays ENABLED, go to next step. If scan tool does not display ENABLED, see appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE.
  17. If cruise control operates normally, problem is intermittent. See PRELIMINARY INSPECTION  in TROUBLE SHOOTING. If system does not operate normally, go to step  35 .
  18. Reconnect all components. Road test vehicle and operate cruise control system. If cruise control operates normally, problem is intermittent. See PRELIMINARY INSPECTION  in TROUBLE SHOOTING. If system does not operate normally, go to step  35 .
  19. Check Brown wire between cruise control module harness connector terminal "F" and CRUISE fuse (10-amp) in instrument panel fuse block for open, high resistance or short to ground. See WIRING DIAGRAMS  . Repair Brown wire as necessary. After repair, check system for normal operation. If wire is okay, go to next step.
  20. Repair open or high resistance in Black/White wire between chassis ground and cruise control module harness connector terminal "E". After repair, check system for normal operation. If condition still exists, go to step  35 .
  21. Check cruise control release switch for proper adjustment. See CRUISE CONTROL RELEASE SWITCH & BRAKELIGHT SWITCH  under ADJUSTMENTS. Adjust switch if necessary. If adjustment is okay, go to step  23 .
  22. Check brakelight switch for proper adjustment. See CRUISE CONTROL RELEASE SWITCH & BRAKELIGHT SWITCH  under ADJUSTMENTS. Adjust switch if necessary. If adjustment is okay, go to step  25 .
  23. Repair open or short to ground in Brown wire between cruise control release switch harness connector and cruise control module harness connector terminal "D". See WIRING DIAGRAMS  . After repair, check system for normal operation. If condition still exists, go to step  33 .
  24. Repair short to voltage in Brown wire between cruise control release switch harness connector and cruise control module harness connector terminal "D". After repair, check system for normal operation. If condition still exists, go to step  33 .
  25. Repair open or high resistance in White wire between brakelight switch harness connector and cruise control module harness connector terminal "G". After repair, check system for normal operation. If condition still exists, go to step  34 .
  26. Repair open or short to ground in Gray wire between cruise control main switch and cruise control module harness connector terminal "A". After repair, check system for normal operation. If condition still exists, go to step  36 .
  27. Disconnect cruise control tester from cruise control module, but leave it connected to wiring harness connector. If CRUISE LAMP LED remained illuminated after disconnection from module, go to step  29 . If CRUISE LAMP LED did not remain illuminated, go to step  35 .
  28. Check Dark Green/White wire between PCM harness connector and cruise control module harness connector terminal "K" for short to battery voltage. Repair Dark Green/White wire as necessary. After repair, check system for normal operation. If wire is okay, go to step  37 .
  29. Check Light Blue/Black wire between PCM harness connector and cruise control module harness connector terminal "J" for short to ground. Repair Light Blue/Black wire as necessary. After repair, check system for normal operation. If wire is okay, go to step  37 .
  30. Check Dark Blue wire between cruise control functional switches harness connector and cruise control module harness connector terminal "B" for short to ground. Repair Dark Blue wire as necessary. After repair, check system for normal operation. If wire is okay, go to step  36 .
  31. Check Gray/Black wire between cruise control functional switches harness connector and cruise control module harness connector terminal "C" for open or high resistance. Repair Gray/Black wire as necessary. After repair, check system for normal operation. If condition still exists, go to step  36 .
  32. Check Dark Green wire between PCM harness connector and cruise control module harness connector terminal "H" for open or high resistance. See WIRING DIAGRAMS  . Repair Dark Green wire as necessary. After repair, check system for normal operation. If condition still exists, go to step  37 .
  33. Replace cruise control release switch. See CRUISE CONTROL RELEASE SWITCH & BRAKELIGHT SWITCH  under REMOVAL & INSTALLATION. After repair, check system for normal operation.
  34. Replace brakelight switch. See CRUISE CONTROL RELEASE SWITCH & BRAKELIGHT SWITCH  under REMOVAL & INSTALLATION. After repair, check system for normal operation.
  35. Replace cruise control module. See CRUISE CONTROL MODULE  under REMOVAL & INSTALLATION. After repair, check system for normal operation. If system still malfunctions, return to step  1 .
  36. Replace cruise control main switch and/or cruise control functional switches. See CRUISE CONTROL MAIN SWITCH  and/or CRUISE CONTROL FUNCTIONAL SWITCHES  under REMOVAL & INSTALLATION. After repair, check system for normal operation.
  37. Replace and program PCM. See appropriate SELF-DIAGNOSTICS article in ENGINE PERFORMANCE. After repair, check system for normal operation.
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