erratic speedometer will not go above thirty mph

2003 TOYOTA CAMRY
193,000 MILES • 2.4L • 4 CYL • AUTOMATIC
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BILL STRU1
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I replaced the output speed sensor, no change. I watched your video on replacing the ABS module,no change. I have replaced the instrument cluster,no change. I did a five hour reset each time. where else should I be looking? this one has me stumped. thank you for your help. Bill
May 31, 2017 at 6:40 PM
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STRAILER
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Hello,

It sounds like you have some wiring issues or a bad connection. Here is some instrument cluster wiring diagrams (BELOW) and a guide so you can do some testing.

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

Please run some tests and get back to us so we can continue helping you.

Cheers, Ken
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Jun 3, 2017 at 12:36 PM
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BILL STRUBLE
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ok i've gone through the wiring,what I can get to..I can't determine what wire is ground at the sensor...the schematic dosen't show ground...if it does it's not labeled.
Jun 25, 2017 at 9:48 AM
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STRAILER
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It is circuit 20 and the ground should be located near the pillar. Its in the second diagram.

Please let us know what happens.

Cheers, Ken
Jun 26, 2017 at 9:36 AM
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BILL STRU1
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ok everything is ohming out correctly voltage checks at sensor are good also..what can I check in the abs side of this...would a bad abs speed sensor cause this?also should i have an output voltage to the speedo?
Jul 2, 2017 at 10:24 AM
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STRAILER
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A bad wheel sensor can cause this for sure, here is a guide so you can test it. There is no speedometer output though.

https://www.2carpros.com/articles/abs-wheel-speed-sensor-test

Please run this test and get back to us we are interested to see what it is.

Cheers, Ken



Jul 2, 2017 at 7:05 PM