CHECK OUTPUT SIGNAL OF ECM.

1) Turn the ignition switch to ON.

2) Measure the voltage between the ECM and chassis ground for faulty cylinders.

Connector & terminal

#1 (B137) No. 8 (+) — Chassis ground (−):

#2 (B137) No. 9 (+) — Chassis ground (−):

#3 (B137) No. 10 (+) — Chassis ground (−):

#4 (B137) No. 11 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No