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Home >> Chevrolet >> 2001 >> Venture Base, Van Passenger >> Repair and Diagnosis >> External Pages >> Different car >> Section 70 (Engine Controls - Self-Diagnostics - 3.5L) >> Diagnostic Tests >> DTC P1635: 5-Volt Reference Low >> Circuit Description

Circuit Description

WARNING: This page is about a different car, the 2002 Oldsmobile Intrigue and 2002 Oldsmobile Aurora. However, it is still accessible from the selected car via links, so may be relevant.

Powertrain Control Module (PCM) uses 5-volt reference "A" circuit as a sensor feed to the Throttle Position (TP) sensor, Manifold Absolute Pressure (MAP) sensor, Engine Oil Pressure (EOP) sensor and Exhaust Gas Recirculation (EGR) position sensor. The PCM monitors voltage on the 5-volt reference "A" circuit. If the voltage is out of tolerance, DTC P1635 will set.

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