Tach Problem
05-05-2003, 07:52 PM
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Tach Problem
Did an auto to manual swap on a 99 EX, switched the ecu from obd2-v2, to obd2-v1. Everything works fine, but the tachometer is not working. No cel's. Does anyone have an idea what can be wrong? Motor is a D16Y8.
05-06-2003, 08:02 PM
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Re: Tach Problem (SixPAK)
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by SixPAK »</TD></TR><TR><TD CLASS="quote">Did an auto to manual swap on a 99 EX, switched the ecu from obd2-v2, to obd2-v1. Everything works fine, but the tachometer is not working. No cel's. Does anyone have an idea what can be wrong? Motor is a D16Y8.
</TD></TR></TABLE>
I believe the OBD2 v2 ECU had the tach signal coming from a wire on the ecu, where your new OBD2 v1 ECU is letting the original (whatever it was) OBD2 v1 motor supply the tach straight from the distributor. Sooo, open up your distributor cap, remove the rotor and cover plate, then look for the empty spade terminal off the ignition control module and wire from the empty spade terminal over to either the wire on the ecu (that is currently not supplying tach signal or to the blue wire on the driver side (tach test connector)
</TD></TR></TABLE>
I believe the OBD2 v2 ECU had the tach signal coming from a wire on the ecu, where your new OBD2 v1 ECU is letting the original (whatever it was) OBD2 v1 motor supply the tach straight from the distributor. Sooo, open up your distributor cap, remove the rotor and cover plate, then look for the empty spade terminal off the ignition control module and wire from the empty spade terminal over to either the wire on the ecu (that is currently not supplying tach signal or to the blue wire on the driver side (tach test connector)
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