Circuit Description

WARNING: This page is about a different car, the 1998 Cadillac Seville. However, it is still accessible from the selected car via links, so may be relevant.

The ignition switch is in RUN position, The Rear Integration Module (RIM) reads fuel level directly across terminals A7 (Purple wire) and B3 (Black wire) on RIM harness connector C1. See WIRING DIAGRAMS . Fuel level sensor resistance is 40 ohms (EMPTY) or 250 ohms (FULL). RIM transfers fuel data to Instrument Panel Cluster (IPC) through a Class-II serial data line every .5 liter change in fuel level. This data is used to determine proper fuel gauge pointer position.

Conditions for setting DTC:

DTC B0532 only sets if DTC B1327 or B1328 is not current in RIM memory.
DTC will set if fuel sensor feedback is open or shorted to ground, or resistance is greater than 276 ohms for 60 seconds.