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Home >> Chevrolet >> 1995 >> Corvette ZR-1 >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 2 (Engine Controls - Tests W/Codes) >> ECM/Pcm Code Charts >> Code 99 Tach Output Circuit >> Circuit Description
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Circuit Description

WARNING: This page is about a different variant/trim than selected.

PCM receives an RPM signal from ignition module. PCM then modifies this signal and sends it to tachometer.

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