CHECK HARNESS BETWEEN ECM AND ACCELERATOR PEDAL POSITION SENSOR CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connectors from ECM and accelerator pedal position sensor.

3) Measure the resistance between ECM and chassis ground.

Connector & terminal

Euro 4 model

(B137) No. 25 — Chassis ground:
(B136) No. 29 — Chassis ground:

Euro 5 model

(B135) No. 30 — Chassis ground:
(B135) No. 31 — Chassis ground:

QUESTION

Is the resistance 1 MΩ or more?

Yes No

Repair the short circuit to ground in harness between ECM and accelerator pedal position sensor connector.