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Cruise Control Is Inoperative

NOTE: To avoid misdiagnosis, perform rev test and trouble shooting. See REV TEST  and TROUBLE SHOOTING. Check for stored DTCs. See TESTS W/CODES article in ENGINE PERFORMANCE section.
  1. Turn cruise control switch to off position. Disconnect cruise control module assembly connector. Turn ignition switch to RUN position. Connect a test light between cruise control module assembly connector (harness side) terminal "F" (Pink wire) and ground. See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, repair open or short to ground in Pink wire between cruise control module assembly and engine compartment fuse/relay center.
  2. Connect a test light between cruise control module assembly connector (harness side) terminals "F" (Pink wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, repair open in Black/White wire between cruise control module assembly and ground connection.
  3. Connect a test light between cruise control module assembly connector (harness side) terminals "G" (Light Blue wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, go to step 5).
  4. Check cruise control release switch and brake switch for proper adjustment. See CRUISE CONTROL RELEASE SWITCH & BRAKE SWITCH ADJUSTMENT  . If cruise control release switch and brake switch is properly adjusted, replace cruise control release switch and brake switch. See CRUISE CONTROL RELEASE SWITCH & BRAKE SWITCH  .
  5. Turn cruise control switch to ON position. Connect a test light between cruise control module assembly connector (harness side) terminals "A" (Gray wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . If test light illuminates, go to step 8). If test light does not illuminate, go to next step.
  6. Disconnect multifunction lever (cruise control switch) connector. Connect a test light between multifunction lever (cruise control switch) connector (harness side) terminal "A" (Pink wire) and ground. See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, repair open or short to ground in Pink wire between multifunction lever (cruise control switch) and rear compartment fuse block located in left front of rear compartment.
  7. Connect a test light between cruise control module assembly connector (harness side) terminals "B" (Gray wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . While observing test light, press and hold cruise control switch in SET/COAST position. If test light illuminates, go to step 9). If test light does not illuminate, go to next step.
  8. Check for an open or short to ground in Dark Blue wire between multifunction lever (cruise control switch) and cruise control module assembly. See WIRING DIAGRAMS  . If Dark Blue wire is okay, replace multifunction lever (cruise control switch). See appropriate STEERING COLUMN SWITCHES article:
  9. Connect a test light between cruise control module assembly connector (harness side) terminals "D" (Purple wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . If test light illuminates, go to step 13). If test light does not illuminate, go to next step.
  10. Using a test light connected to ground, backprobe ABS/TCC switch connector (harness side) terminal "B" (Purple wire). See WIRING DIAGRAMS  . If test light illuminates, repair open in Purple wire between ABS/TCC switch, cruise control module assembly and PCM. If test light does not illuminate, go to next step.
  11. Turn ignition switch to OFF position. Disconnect ABS/TCC switch connector. Turn ignition switch to ON position. Connect a test light between ABS/TCC switch connector (harness side) terminal "A" (Pink wire) and ground. See WIRING DIAGRAMS  . If test light illuminates, go to next step. If test light does not illuminate, repair open or short to ground in Pink wire between ABS/TCC switch and rear compartment fuse block located in left front of rear compartment.
  12. Ensure ABS/TCC switch connector is clean and tight. Check ABS/TCC switch for proper adjustment. See ABS/TCC SWITCH ADJUSTMENT  . If ABS/TCC switch is properly adjusted, replace ABS/TCC switch. See ABS/TCC SWITCH under REMOVAL & INSTALLATION.
  13. Set parking brake. Raise drive wheels. Using a DVOM, measure voltage between cruise control module assembly connector (harness side) terminals "K" (Dark Green/White wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . While observing DVOM, rotate drive wheels by hand. If voltage varies, go to next step. If voltage does not vary, check for an open or short to ground in Dark Green/White wire between cruise control module assembly, instrument cluster, Continuously Variable Road Sensing Suspension (CVRSS) module, and PCM.
  14. Connect scan tool to Data Link Connector (DLC). Using a DVOM, measure voltage between cruise control module assembly connector (harness side) terminals "H" (Dark Green wire) and "E" (Black/White wire). See WIRING DIAGRAMS  . Using scan tool, command cruise control module assembly to ALLOW cruise. If battery voltage is present, go to step 16). If battery voltage is not present, go to next step.
  15. Check for an open or short to ground in Dark Green wire between cruise control module assembly and PCM. Ensure PCM connector C1 terminal No. 26 (Dark Green wire) is clean and tight. If Dark Green wire and connector are okay, check PCM. See TESTS W/CODES article in ENGINE PERFORMANCE section.
  16. Turn ignition switch to OFF position. Reinstall cruise control module assembly. Turn ignition switch to ON position. Using scan tool, monitor SMCC INHIBITED display. If cruise control module assembly is inhibited, check PCM See TESTS W/CODES article in ENGINE PERFORMANCE section. If cruise control module assembly is not inhibited, ensure cruise control module assembly connector is clean and tight. If connector is okay, replace cruise control module assembly. See CRUISE CONTROL MODULE ASSEMBLY  under REMOVAL & INSTALLATION.
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