Cruise Control Systems

• Description & Operation
  • Notes
  • System Controls
    • To Set Cruise Control
    • To Disengage Cruise Control
    • To Resume Previous Speed
    • To Increase Speed
    • To Decrease Speed
• Self-Diagnostic System
  • System Diagnostics
  • Service Precautions
  • Visual Inspection
  • Diagnostic Procedure
  • Entering On-Board Diagnostics
    • Notes
    • CHECK ENGINE Light Diagnostic Mode
    • DRB-II Diagnostic Mode
  • Clearing Fault Codes
  • Fault Codes
  • DRB-II Test Functions
  • Speed Control Menu
• Trouble Shooting
  • Notes
  • No Cruise Control When Set Button Is Pressed & Released
  • Cruise Control Engages Without Actuating Cruise Set Button
  • Cruise Control Engages When Engine Is Started
  • Erratic Speed Or Engine Shuts Off
  • Cruise Control Disengages On Rough Road
  • Engine Does Not Return To Normal Idle
  • No Resume When Resume Button Is Pressed
  • Cruise Control Does Not Disengage With Brake Pedal Depressed
• Testing
  • (Without DRB-II)
    • Brakelight Switch
  • Cruise Control Circuit
  • Cruise Control Servo Test
  • Cruise Control Switch - ZJ Models
  • Servo Vacuum
  • Vacuum Supply
• Removal & Installation
  • Notes
  • Cruise Control Servo
    • Removal
    • Installation
  • Cruise Control Switch
    • Removal & Installation (XJ Models)
    • Removal & Installation (ZJ Models)
  • Connector Identification
• Self-Diagnostics
  • Notes
  • Test SC-1A - Checking For Cruise Control System Faults
  • Test SC-2A - Repairing Power & Ground Supply For Open To Servo Solenoids
  • Test SC-2B - Cruise Control Vacuum Solenoid Control Circuit
  • Test SC-2C - Cruise Control Vent Solenoid Control Circuit
  • Test SC-3A - No Vehicle Speed Sensor Signal
  • Test SC-3B - No Vehicle Speed Sensor Signal
  • Test SC-3C - No Vehicle Speed Sensor Signal
  • Test SC-3D - No Vehicle Speed Sensor Signal
  • Test SC-3E - No Vehicle Speed Sensor Signal
  • Test SC-3F - No Vehicle Speed Sensor Signal
  • Test SC-3G - No Vehicle Speed Sensor Signal
  • Test SC-4A - Checking Cruise Control Switches
  • Test SC-5A - Checking Cruise Control On/Off Switch Sense Circuit
  • Test SC-5B - Repairing A Short In Speed Control Switch CKTS
  • Test SC-5C - Repairing Short In Ignition 12 Volt Feed Circuit
  • Test SC-5D - Repairing Open In Ignition 12 Volt Feed Circuit
  • Test SC-6A - Repairing Cruise Control Resume Switch Sense CKT
  • Test SC-7A - Repairing Cruise Control Set Switch Circuit
  • Test SC-8A - Checking Cruise Control Switch Circuit
  • Test SC-8B - Testing CLOCKSPRING Circuit For Shorts
  • Test SC-8C - Testing CLOCKSPRING Circuit For Open
  • Test SC-9A - Repairing Cruise Control Switch CKT Short To GND
  • Test SC-10A - Checking Brake Switch Circuit For Open
  • Test SC-10B - Checking Brake Switch Circuit For Shorts
  • Test SC-11A - Checking Cruise Control Servo Operation
  • Test SC-11B - Checking Vacuum To Cruise Control Servo
  • Test SC-12A - Checking Park/Neutral Switch Circuit
  • Test SC-13A - Checking For Intermittent Faults
  • Test SC-VER - Cruise Control Verification
• Wiring Diagram