CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM and electronic throttle control.

3) Measure the resistance between ECM and chassis ground.

Connector & terminal

Euro 4 model

(B137) No. 25 — Chassis ground:
(B137) No. 23 — Chassis ground:
(B137) No. 23 — (B136) No. 22:

Euro 5 model

(B134) No. 28 — Chassis ground:
(B134) No. 19 — Chassis ground:
(B134) No. 19 — (B137) No. 27:

QUESTION

Is the resistance 1 MΩ or more?

Yes No

Repair the short circuit to ground in harness between ECM and electronic throttle control connector.