Procedure G, Speed Sensor Circuit (Elect. Controlled Trans.)
- Speed Sensor: Jack up front wheel. Check continuity between wiring harness side of speed sensor terminal No. 5 (White/Black wire) and ground. If continuity exists, go to next step. If no continuity exists, repair wiring harness open circuit between speed sensor terminal No. 5 (White/Black wire) and ground. Also check for faulty ground.
- Check speed sensor for proper operation. See SPEED SENSOR TEST under TESTING in this article. If speed sensor is faulty, replace sensor and recheck cruise control system. If speed sensor is okay, go to next step.
- Turn ignition on. Check for 5-volt reference voltage between ECU terminal No. 10 (Light Green/Black wire) and ground. If voltage is correct, go to next step. If voltage is incorrect, power source or ECU is faulty. Recheck power source circuit using PROCEDURE A, POWER SOURCE CIRCUIT.
- Check for 5-volt reference voltage between wiring harness side of speed sensor terminal No. 6 (Light Green/Black wire) and ground. If voltage is correct, reconnect speed sensor and go to next step. If voltage is incorrect, repair wiring harness short circuit between speed sensor terminal No. 6 (Light Green/Black wire) and ECU terminal No. 10 (Light Green/Black wire).
- Cruise Control ECU: Disconnect electronic control unit. While spinning front wheel, check voltage between wiring harness side of ECU terminal No. 10 (Light Green/Black wire) and ground. If voltage fluctuates repeatedly between zero (0) and at least 5 volts, replace faulty ECU and recheck cruise control system. If voltage does not exist or fluctuate as indicated, repair wiring harness open circuit between speed sensor terminal No. 6 (Light Green/Black wire) and ECU terminal No. 10 (Light Green/Black wire). Also check for bad connection at speed sensor.