CHECK IGNITION POWER SUPPLY CIRCUIT.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from rear vehicle speed sensor.

3) Turn the ignition switch to ON.

4) Measure the ignition power supply voltage between rear vehicle speed sensor connector and transmission ground.

Connector & terminal

(AT4) No. 3 (+) — Transmission ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Check for open circuits, shorts or poor contact in the harness between the rear vehicle speed sensor and battery, and perform repairs.