Cruise Control Unit Input Test

SRS components are located in this area. Review the SRS component locations, and precautions and procedures, before performing repairs or service.

1.Disconnect the 14P connector from the control unit.

2.Inspect the connector and socket terminals to be sure they are all making good contact.

  • If the terminals are bent, loose, or corroded, repair them as necessary, and recheck the system.
  • If the terminals look OK, go to 3.

 

3.With the 14P connector disconnected, make these input tests.

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
BRN/WHT Connect battery power Check the operation of the magnetic clutch: Clutch should click and output link should be locked. 
  • Faulty actuator
  • Poor ground (G201)
  • An open in the wire
  • Short to ground
 
BLU Ignition switch ON (II), main switch ON and brake pedal pressed, then released Check for voltage to ground:
There should be 0 V with the pedal pressed and battery voltage with the pedal released. 
  • Faulty  brake pedal position switch
  • An open in the wire
  • Open in cruise control main switch
  • Blown No.4 (10A) fuse in the under-dash fuse/relay box
 
BLK Under all conditions Check for continuity to ground:
There should be continuity. 
  • Poor ground (G501)
  • An open in the wire
 
GRN/YEL Ignition switch ON (II) Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 4 (10 A) fuse in the under-dash fuse/relay box
  • An open in the wire
 
WHT/BLK Brake pedal pressed, then released Check for voltage to ground:
There should be battery voltage with the pedal pressed, and 0 V with the pedal released. 
  • Blown No. 7 (15 A) fuse in the under-hood fuse/relay box
  • Faulty  brake pedal position switch
  • An open in the wire
 

Cavity Wire Test condition Test: Desired result Possible cause if result is not obtained 
GRY/RED Set button pushed Check for voltage to ground: There should be battery voltage.
When testing terminal No. 6, there should be no voltage on terminal No. 7. 
  • Blown No. 7 (15 A) fuse in the under-hood fuse/relay box
  • Faulty  horn relay
  • Faulty set/resume/cancel switch
  • Faulty cable reel
  • An open in the wire
 
LT GRN/
BLK 
Resume button pushed Check for voltage to ground: There should be battery voltage.
When testing terminal No. 7, there should be no voltage on terminal No. 6. 
BRN Connect battery power to the BRN terminal and ground to the BRN/YEL terminal Check the operation of the actuator motor: You should be able to hear the motor. 
  • Faulty actuator
  • An open in the wire
 
11 BRN/YEL 
10 BLU/YEL Ignition switch ON (II) Attach to ground:
Cruise indicator light in the gauge assembly should comes on. 
  • Blown No. 10 (7.5 A) fuse in the under-dash fuse/relay box
  • Faulty gauge assembly
  • An open in the wire
 
12 BLU/WHT Ignition switch ON (II) and main switch ON; raise the front of the vehicle, and rotate one wheel slowly while holding the other wheel Check for voltage between the BLU/WHT (+) and BLK (-) terminals:
There should be 0-5 V or more repeatedly. 
  • Faulty  ECM/ PCM
  • An open in the wire
  • Short to ground
 
13 LT GRN Ignition switch ON (II) and main switch ON Check for voltage to ground:
There should be battery voltage. 
  • Blown No. 4 (10 A) fuse in the under-dash fuse/relay box
  • Faulty main switch
  • An open in the wire
 
14 WHT/GRN (A/T)
LT BLU
(M/T) 
A/T: Shift lever in [D] or [D3]
M/T: Clutch pedal released 
Check for continuity to ground:
There should be continuity.
NOTE: There should be no continuity when the clutch pedal is pressed or when the shift lever is in other positions. 
  • Faulty  transmission range switch
  • Faulty  clutch pedal position switch
  • Poor ground (M/T: G501, A/T: G101)
  • An open in the wire
 
BLU/ORN Reconnect the cruise control unit 14P connector, start the engine, turn the main switch ON and drive the vehicle to speeds over 25 mph (40 km/h) with the cruise control set. Check for voltage to ground: There should be about 1V 
  • Loose connection at the PCM
  • Faulty  cruise control unit
  • Short to ground
 

4.If any test indicates a problem, find and correct the cause, then recheck the system. If all the input tests prove OK, the control unit may be faulty. Substitute a known-good control unit and retest. If the system works properly, replace the control unit.