CHECK POWER SUPPLY OF ELECTRONIC THROTTLE CONTROL RELAY.

1) Turn the ignition switch to ON.

2) Measure the voltage between the electronic control throttle relay connector and engine ground.

Connector & terminal

(B309) No. 1 (+) — Engine ground (−):

(B309) No. 2 (+) — Engine ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the open or ground short circuit of power supply circuit.