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Symptom Troubleshooting Index

DIAGNOSTIC CHART

Symptom Diagnostic procedure Also check for
Cruise control cannot be set
  1. Check for PGM-FI DTCs (see GENERAL TROUBLESHOOTING INFORMATION ).
  2. Check horn operation.
  3. Check the cruise control main switch (see CRUISE CONTROL MAIN SWITCH TEST/REPLACEMENT  ).
  4. Check the cruise control set/decel, resume/accel, cancel switch (see CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT  ).
  5. Test the brake pedal position switch (see LICENSE PLATE LIGHT REPLACEMENT ) and check its adjustment (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH A ).
  6. Test the clutch pedal position switch (see CLUTCH PEDAL POSITION SWITCH TEST  ) and check its adjustment (M/T) (see CLUTCH PEDAL, CLUTCH PEDAL POSITION SWITCH, A ).
  7. Check the transmission range switch (A/T) (see TRANSMISSION RANGE SWITCH TEST ).
  8. Do the cruise control unit input test (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
  • Blown No. 4 (10 A) fuse in the under-dash fuse/relay box
  • Blown No. 7 (15 A) fuse in the under-hood fuse/relay box
  • Poor ground: G101 (A/T), G301, G502 (M/T)
  • Faulty horn relay
  • Open circuit, loose or disconnected terminals: BLK/YEL, LT GRN, BLU, YEL/GRN, BLU/WHT
Cruise control can be set, but the cruise control indicator does not come on
  1. Do the gauge control module self-diagnostic function procedure (see SELF-DIAGNOSTIC FUNCTION ).
  2. Do the cruise control unit input test on pin No. 2 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Open circuit, loose or disconnected terminals: BLU/YEL
Cruise speed is noticeably higher or lower than what was set
  1. Adjust the cruise control cable (see CRUISE CONTROL ACTUATOR CABLE ADJUSTMENT  ).
  2. Do the cruise control unit input test on pin No. 5 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
  
Excessive overshooting or undershooting when trying to set speed
  1. Adjust the cruise control cable (see CRUISE CONTROL ACTUATOR CABLE ADJUSTMENT  ).
  2. Do the cruise control unit input test on pin No. 5 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
  
Speed fluctuates on a flat road with the cruise control set
  1. Adjust the cruise control cable (see CRUISE CONTROL ACTUATOR CABLE ADJUSTMENT  ).
  2. Do the cruise control unit input test on pin No. 5 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
  
Vehicle does not decelerate or accelerate accordingly when the set/decel or resume/accel switch is pressed
  1. Check the cruise control set/decel, resume/accel, cancel switch (see CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT  ).
  2. Do the cruise control unit input test on pins No. 8 and No. 9 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Open circuit, loose or disconnected terminals: GRY/RED, LT GRN/BLK
Set speed does 0not cancel (engine RPM stays high) when the clutch pedal is pressed (M/T)
  1. Test the clutch pedal position switch (see CLUTCH PEDAL POSITION SWITCH TEST  ) and check its adjustment (see CLUTCH PEDAL, CLUTCH PEDAL POSITION SWITCH, A ).
  2. Do the cruise control unit input test on pin No. 3 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Short to ground in the YEL/GRN wire
Set speed does not cancel (engine RPM stays high) when the shift lever is moved to N (A/T)
  1. Check the transmission range switch (see TRANSMISSION RANGE SWITCH TEST ).
  2. Do the cruise control unit input test on pin No. 3 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Short to ground in the YEL/GRN wire
Set speed does not cancel when the brake pedal is pressed
  1. Test the brake pedal position switch (see LICENSE PLATE LIGHT REPLACEMENT ) and check its adjustment (see BRAKE PEDAL AND BRAKE PEDAL POSITION SWITCH A ).
  2. Do the cruise control unit input test on pins No. 1 and No. 11 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Short to power on BLU wire
Set speed does not cancel when the cruise control main switch is turned off
  1. Check the cruise control main switch (see CRUISE CONTROL MAIN SWITCH TEST/REPLACEMENT  ).
  2. Do the cruise control unit input test on pin No. 7 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Short to power in the LT GRN wire
Set speed does not cancel when the cancel switch is pressed
  1. Check the cruise control set/decel, resume/accel, cancel switch (see page CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT  ).
  2. Do the cruise control unit input test on pins No. 8 and No. 9 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
 Open circuit, loose or disconnected terminals: GRY/RED, LT GRN/BLK
Set speed will not resume when the resume/accel switch is pressed (with the cruise control main switch turned on, and set speed temporarily canceled by pressing the brake pedal)
  1. Check the cruise control set/decel, resume/accel, cancel switch (see page CRUISE CONTROL SET/DECEL, RESUME/ACCEL, CANCEL SWITCH TEST/REPLACEMENT  ).
  2. Do the cruise control unit input test on pins No. 8 and No. 9 (see CRUISE CONTROL ACTUATOR INPUT TEST  ).
  • Faulty brake pedal position switch
  • Open circuit, loose or disconnected terminals: LT GRN/BLK
The transmission shifts down slower than normal when going uphill with the cruise control on (A/T) Troubleshoot the cruise control communication circuit (see CRUISE CONTROL COMMUNICATION CIRCUIT TROUBLESHOOTING  ). Open circuit, loose or disconnected terminals: BLU/ORN
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