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sprinkles08, ASE Certified Technician
Category: Toyota
Satisfied Customers: 22816
Experience:  ASE Master and Advanced level certified. Factory trained with 15 years dealership experience
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Tacoma: I have a 2003 Tacoma 4 cylinder(2RZ-FE) with stock

Customer Question

I have a 2003 Tacoma 4 cylinder(2RZ-FE) with stock tachometer. I am trying to connect my multimeter that has tach function to check engine speed. To what electrical component and component wire do I connect the red lead for tach signal?
Submitted: 2 years ago.
Category: Toyota
Expert:  sprinkles08 replied 2 years ago.
Hello and welcome to JustAnswer!
Unlike older vehicles with a dedicated tach signal wire, your truck's instrument cluster gets it's information from the communication bus. On modern vehicles the gauge information comes from other modules, all modules communicate in coded messages over a wired bus network. Unless your meter has the capability to determine RPM from a crank sensor signal or coil/injector driver then it wouldn't be able to measure engine speed.