All Models
- Check for fluctuation of speedometer while driving at a steady speed. If speedometer fluctuates, speedometer might be faulty or dry. If speedometer does not fluctuate, turn ignition off. Disconnect speed sensor connector.
- Check for continuity between terminal B on Camry analog gauges, terminal A9 on Camry digital gauges, terminal No. 2 on Celica and MR2, terminal B5 on RWD Corolla, terminal A8 on FWD Corolla, terminal B9 on Cressida analog gauges, terminal A9 on Cressida digital gauges, terminal B7 on Pickup and 4Runner analog gauges, terminal C2 on Pickup and 4Runner digital gauges, terminal A5 on Tercel Wagon, terminal B1 on Tercel Sedan, terminal No. 5 on Supra.
- If no continuity is present, check for open between terminal and body ground. If continuity is present, check speed sensor operation. If speed sensor is not operating properly, replace sensor. If sensor is operating properly, disconnect computer connector.
- Check for continuity between terminal A on Camry anaolog gauges, terminal A11 on Camry digital gauges, terminal No. 1 on Celica, terminal B4 on RWD Corolla and MR2, terminal B6 on FWD Corolla, terminal B7 on Cressida analog gauges, terminal A11 on Cressida digital gauges, terminal B4 on Pickup and 4Runner analog gauges, terminal C12 on Pickup and 4Runner digital gauges, terminal A4 on Tercel Wagon, terminal B2 on Tercel Sedan, terminal No. 6 on Supra of connector and terminal No. 7 of computer.
- If no continuity is present, check for open between (terminals listed above) of speed sensor and terminal 7 of computer. If continuity is present, replace cruise control computer.