How to Diagnose a P2138 (Reduced Power) ACC Pedal Issue with a Tech2 & DMM

MRRSM

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How to Use a Tech2 Scanner with a DMM to Diagnose an “ACC Circuit AGREE-Dis-AGREE” P2138 Reduced Power Issue between the High and Low 5 Volt Reference Signal Circuit on the Accelerator Pedal … and other possible related Reduced Power problems (such as a Shorted EV Fan Clutch) that can bring the down the Databus for OTHER Modules using the 5 Volt reference signals on the circuit :


Pay No Attention to all that Road Salt Rust Damage present in the Engine Compartment…

This is Another Problem you can resolve IF you have a “GYMKO” Tech2 Scanner....STILL available at aliexpress.com
 
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