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5 volt ref

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6 years 3 months ago #37196 by bigtrucknut
5 volt ref was created by bigtrucknut
1999 jeep grand cherokee laredo 4.0 getting 5 volts on all 3 wires on crank and cam connectors. what the hell?
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6 years 3 months ago #37204 by jreardon
Replied by jreardon on topic 5 volt ref
Probably open ground somewhere. What does your IAT and ECT read? Those sensor share ground with CKP and CMP sensor. See attachment.

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File Name: engperf.pdf
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6 years 3 months ago - 6 years 3 months ago #37205 by Chad
Replied by Chad on topic 5 volt ref
I second the OPEN ground. Sensor Ground comes from the PCM, Connector 1, Pin A4.

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File Name: 1999Jeep4....ound.pdf
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Last edit: 6 years 3 months ago by Chad.
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