P1610 immobilizer system malfunction

BRITESIDE

MEMBER
2001 MITSUBISHI GALANT
125,000 MILES

Car came in, died while driving. No voltage to most sensors and no communication with scanner. After changing pcm and reprogram from locksmith, have power to all sensors, good spark no fuel injector pulse and p1610 code keeps coming back. Every time you turn the key on. Also have no rpm signal from crank sensor. Have checked all wiring from pcm to inj. And crank sensor. Replaced cks and differt pcm, same problem any suggestions?

2 Replies

KEN L

MASTER CERTIFIED MECHANIC
47,631 POSTS

Hello,

It sounds like the immobilizer ECU has gone out but to be sure lets run some power and ground tests. Here are some guides and diagrams (below) to help you confirm the problem.

https://www.2carpros.com/articles/how-to-use-a-test-light-circuit-tester

and

https://www.2carpros.com/articles/how-to-check-wiring

Please let us know what happens, we are interested to see what it is.

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