CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE.

1) Turn the ignition switch to ON.

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

Connector & terminal

(E57) No. 5 (+) — Engine ground (−):

3) Check the voltage change by shaking the harness and connector of ECM and engine harness connector while monitoring the value with voltage meter.

QUESTION

Is the voltage less than 10 V?

Yes No

Repair the short to power supply in harness between ECM connector and electronic throttle connector.