My daughter's 2004 Concorde LXi, 3.5 engine, just started cutting out around 2,500 rpm in any gear. Code P0016 shows for error in crank and cam signal. 5V measured at cam sensor power. I replaced the crank sensor; no improvement. Cam sensor is recent, and when it last went out it gave a different code from this one. I just disconnected both cam sensor and crank sensor connectors and all four PCM connectors so the wiring shouldn't be connected to anything now. Between the cam sensor connector power pin (violet/white) and the signal pin (tan/yellow) I measure about 3 ohms. I'd expect an open circuit from the shop manual. Is there any reason I should see a low resistance between these two pins, or does this sound like a short in the wiring harness? If it's wiring, any ideas on the most likely location for the short?
Answer Hi Julian,
The 0016 can be caused by problems with either sensor, or their wire harnesses, of by the tone wheels that the sensors detect being faulty. It is basically saying that the rotational angular relationship between the two signals is not as it is supposed to be.
The measurement you made is basically between pins 29 and 34 of the pcm unless you also removed that gray multipin plug at the pcm before making the measurement. I don't know what it should read but check to see if it indeed shows 3 ohms. If so, then re-measure the reading on the cam plug now with harness completely disconnected at both ends. If that is now infinite, then measure between 29 and 35 and see if the crank sensor reading is also 3 ohms. If it is, then I would wonder about whether there is a problem with a sensor not being seater properly to detect rotating item, or the rotating item itself (either the crank or cam).
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