PT cruiser issues.

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  • 19mopar
    Member
    • Oct 2010
    • 38

    PT cruiser issues.

    Hello all

    I am working on a 2001 Pt cruiser that customer states that speedo will intermittantly drop out and tranny will abnormally shift. Only code stored was a P1790 fault immediately after shift. CVI's look normal. Test drove a number of times after resetting codes with no problems. Checked a/c ripple and got thisranum alt ripple at alt peak detect off.vss and this ranum alt ripple at alt peak detect on.vss. I am not an expert on A/C ripple but I have read the rule of thumb is anything over 500mv is excesive. If i am reading this correctly i have about 1.5 volts of a/c ripple The test leads of verdict scope were at batt terminal at alt and alt case. Reading was at 3000 rpm with blower on high and head lights on. A/C coupling was selected and Peak detect was turned off in first capture and on in second capture. Any input would be appreciated.

    Thanks
    Darren
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