Check Harness Between ECM & Electronic Throttle Control

Turn the ignition switch to OFF.

Disconnect the connector from ECM.

Disconnect the connector from electronic throttle control.

Measure the resistance between the ECM connector and electronic throttle control connector.

Connector & terminal 

(B136) No. 29 - (E57) No. 4: 

Is the measured value less than 1 O? 

YES. Go to next step. 

NO 

Repair the open harness connector.

Check the resistance between the ECM connector and chassis ground.

Connector & terminal 

(B136) No. 29 - Chassis ground: 

Is the measured value more than 1 MO? 

YES. Go to next step. 

NO 

Repair the chassis short of harness.