Unplug the knock sensor connector and the ECM harness connector. Check for
an open or short-circuit to ground between the knock sensor terminal 1 and
the ECM terminal 58. If a short or open-circuit does exist, repair the harness
between the two terminals.
Check for continuity from the knock sensor terminal 2 and ground. If there
is no continuity, repair the terminal between the knock sensor terminal 2
and the ground.
Plug all connectors back into their original components.
Fig. 1: The arrangement of the knock sensor connector
terminals — 3.5L engines
