CHECK OUTPUT SIGNAL OF ECM.

Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B134) No. 1 (+) — Chassis ground (−):

(B134) No. 2 (+) — Chassis ground (−):

(B134) No. 9 (+) — Chassis ground (−):

(B134) No. 10 (+) — Chassis ground (−):

QUESTION

Does the voltage change by shaking the harness and connector of ECM while monitoring the value on voltage meter?

Yes No

Repair the short to power supply in the harness between ECM and front oxygen (A/F) sensor connector.

END.