CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE.

Measure the resistance between ECM connector and chassis ground.

Connector & terminal

(B137) No. 23 — Chassis ground:

(B137) No. 24 — Chassis ground:

(B137) No. 25 — Chassis ground:

QUESTION

Is the resistance 1 MΩ or more?

Yes No

Repair the ground short circuit of harness between ECM and electronic throttle.