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Home >> Chevrolet >> 2001 >> Camaro Base, 2D Convertible, Automatic >> Repair and Diagnosis >> External Pages >> Different car >> Section 7 (Engine Control System Self-Diagnostics - 5.7L) >> Diagnostic Tests >> DTC P1635: 5-Volt Reference No. 1 Circuit >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2000 Pontiac Firebird, 2000 Chevrolet Corvette, and 2000 Chevrolet Camaro. However, it is still accessible from the selected car via links, so may be relevant.

PCM uses a common 5-volt reference No. 1 circuit as a sensor feed to A/C pressure, MAP, Engine Oil Pressure (EOP) and left tank fuel level sensors. PCM monitors voltage on 5-volt reference No. 1 circuit. If voltage is out of range, DTC will set.

DTC will set when PCM detects 5-volt reference No. 1 circuit is out of range and condition is met for greater than 2 seconds.

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