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Home >> GMC >> 2001 >> Jimmy 2D Utility, RWD, Automatic >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> System Tests >> Cruise Control Inoperative/Malfunctioning >> Without Cruise Control Tester J42958

Without Cruise Control Tester J42958

  1. If Diagnostic System Check was performed, go to next step. If Diagnostic System Check was not performed, see DIAGNOSTIC SYSTEM CHECK  under SELF-DIAGNOSTIC SYSTEM.
  2. Turn ignition switch to OFF position. Disconnect cruise control module harness connector. Turn ignition switch to ON position. Using a test light connected to ground, probe cruise control module harness connector terminal "F" (Brown wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  34 .
  3. Using a test light, probe between control module harness connector terminal "F" (Brown wire) and terminal "E" (Black/White wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  35 .
  4. Turn ignition on, engine off. Turn cruise control switch to OFF position. Using a test light connected to ground, individually probe cruise control module harness connector terminals "A" (Gray wire), "B" (Dark Blue wire) and "C" (Gray/Black wire). If test light does not illuminate on any circuit, go to next step. If test light illuminates on any circuit, go to step  16 .
  5. Turn ignition on, engine off. Turn cruise control switch to ON position. Using a test light connected to ground, probe cruise control module harness connector terminal "A" (Gray wire). If test light illuminates, go to next step. If test light does not illuminate, go to step  17 .
  6. Using a test light connected to ground, probe cruise control module harness connector terminal "B" (Dark Blue wire). Press and hold SET (Set/Coast) switch. If test light illuminates, go to next step. If test light does not illuminate, go to step  19 .
  7. Using a test light connected to ground, probe cruise control module harness connector terminal "C" (Gray/Black wire). Press and hold R/A (Resume/Accelerate) switch. If test light illuminates, go to next step. If test light does not illuminate, go to step  20 .
  8. Using a test light connected to ground, probe cruise control module harness connector terminal "D" (Brown/White wire). If test light illuminates, go to step  24 . If test light does not illuminate, go to next step.
  9. Press brake pedal while observing test light. If test light does not illuminate, go to step  25 . If test light illuminates, go to next step.
  10. Using a test light connected to ground, probe Light Blue wire at cruise control harness connector terminal "G". If test light does not illuminate, go to next step. If test light illuminates, go to step  12 .
  11. If vehicle is equipped with a manual transmission, go to step  13 . If vehicle is not equipped with a manual transmission, go to step  21 .
  12. Press brake pedal while monitoring test lamp. If test lamp illuminates, go to step  23 . If test lamp does not illuminate, go to step  14 .
  13. Turn ignition off. Disconnect Clutch Pedal Position (CPP) switch. Turn ignition on, engine off. Probe terminal "A" (Purple wire) of CPP switch harness connector. If test lamp illuminates, go to step  26 . If test light does not illuminate, go to step  22 .
  14. Using DVOM, probe terminal "J" (Light Blue/Black wire) at cruise control module harness connector. If voltage measures near battery positive voltage, go to next step. If voltage does not measure near battery positive voltage, go to step  27 .
  15. Check speedometer for proper operation. If speedometer operates correctly, go to step  28 . If speedometer does not operate correctly, see appropriate ANALOG INSTRUMENT PANELS article in ACCESSORIES & EQUIPMENT.
  16. Test circuit that illuminated test light for a short to voltage. If problem is found, repair as necessary and then go to step  40 . If test lamp does not illuminate, go to step  31 .
  17. Test cruise control on switch circuit (Gray wire) for an open or high resistance. Test Set/Coast and Resume/Accel circuits for short to ground. If problem is found, repair as necessary and then go to step  40 . If problem is not found, go to next step.
  18. Test cruise control switch ignition positive voltage circuit (Brown wire) for an open or high resistance. If problem is found, repair as necessary and then go to step  40 . If problem is not found, go to step  31 .
  19. Test cruise control Set/Coast signal circuit (Dark Blue wire) for an open or high resistance. If problem is found, repair as necessary and then go to step  40 . If problem is not found, go to step  31 .
  20. Test cruise control Resume/Accelerate signal circuit (Gray/Black wire) for an open or high resistance. If problem is found, repair as necessary and then go to step  40 . If problem is not found, go to step  31 .
  21. Test TCC/Brake, cruise release switch signal circuit (Brown/White wire) for an open or high resistance. If problem is found, repair as necessary and then go to step  40 . If problem is not found, go to step  30 .
  22. Test CPP switch ignition positive voltage circuit (Brown wire) for an open or high resistance. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  30 .
  23. Test TCC/Brake, cruise release switch circuit (Brown/White wire) for a short to voltage. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  30 .
  24. Test stop lamp switch signal circuit (Purple wire) for a short to voltage. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  30 .
  25. Test stop lamp switch signal circuit for an open or high resistance. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  30 .
  26. Test CPP switch signal circuit (Brown/White wire) for an open or high resistance. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  29 .
  27. Test cruise engaged signal circuit (Light Blue wire) for an open, high resistance or short to ground. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  32 .
  28. Test speed sensor circuit for an open or high resistance between PCM and cruise control module. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  32 .
  29. Inspect for poor connections at harness connector of CPP switch. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  36 .
  30. Inspect for poor connections at harness connector of stop lamp switch. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  36 .
  31. Inspect for poor connections at harness connector of cruise control switch. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  37 .
  32. Inspect for poor connections at harness connector of cruise control module. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  38 .
  33. Inspect for poor connections at PCM harness connector. If problem was found, repair as necessary and then go to step  40 . If problem was not found, go to step  39 .
  34. Repair ignition positive voltage circuit (Brown wire) of cruise control module. After completing repair, go to step  40 .
  35. Repair ground circuit (Black/White wire) of cruise control module. After completing repair, go to step  40 .
  36. Replace stoplamp switch or clutch start switch. See BRAKELIGHT & CLUTCH PEDAL POSITION SWITCHES  under REMOVAL & INSTALLATION. After completing repair, go to step  40 .
  37. Replace multifunction turn signal lever. See appropriate STEERING COLUMN SWITCHES article in ACCESSORIES & EQUIPMENT. After completing repair, go to step  40 .
  38. Replace cruise control module. See CRUISE CONTROL MODULE ASSEMBLY  under REMOVAL & INSTALLATION. After completing repair, go to step  40
  39. Replace PCM. See appropriate REMOVAL, OVERHAUL & INSTALLATION article in ENGINE PERFORMANCE. After completing repair, go to next step.
  40. Operate vehicle within conditions for cruise control operation.
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