LEMON Manuals: Even more car manuals for everyone
Home >> Toyota >> 1988 >> Camry Base, Standard >> Repair and Diagnosis >> Accessories & Equipment >> Cruise Control Systems >> Circuit Testing >> Stoplight Switch Circuit

Stoplight Switch Circuit

  1. Turn ignition OFF. Check stoplight fuse. If fuse is blown, replace fuse and check operation of stoplight switch circuit. If operation is not normal, check for short between terminal 16 of computer and terminal 1 of stoplight switch and fuse. See Figure.
  2. Disconnect stoplight switch connector, check for continuity between connector terminal 3 and body ground. If no continuity is present, check for open between connector terminal 3 and body ground. Test body ground circuit.
  3. If continuity is present, check operation of stoplight switch. With brake pedal depressed, (switch free), there should be continuity between terminals 1 and 3, and no continuity between terminals 2 and 4. With brake pedal released, (switch depressed), there should be continuity between terminals 2 and 4, and no continuity between terminals 1 and 3. See Figure. If results are not as specified, replace stoplight switch. If results are as specified, go to next step.
  4. Reconnect stop light switch connector. Disconnect computer connector, check for battery voltage between computer connector terminal 16 and body ground with brake pedal released. If no battery voltage is present, check for open between terminal 16 of computer and stoplight fuse.
  5. If battery voltage is present, check for battery voltage between computer connector terminal 15 and ground with brake pedal depressed. If no battery voltage is present, check for open between computer connector terminal 15 and stoplight switch connector terminal 3. If battery voltage is present, replace cruise control computer.
scientia non olet · About LEMON Manuals