LEMON Manuals: Even more car manuals for everyone: 1960-2025
Home >> Oldsmobile >> 1988 >> Custom Cruiser >> Repair and Diagnosis >> External Pages >> Different car >> Section 11 (DFI ECM Tests W/Codes) >> Test Choice Selection >> Notes
April 5, 2026: LEMON Manuals is launched! Read the announcement.

Test Choice Selection: Notes

WARNING: This page is about a different car, the 1988 Cadillac Seville and 1988 Cadillac Eldorado. However, it is still accessible from the selected car via links, so may be relevant.

Selection of "DATA?", "INPUTS?", or "OVERRIDE?" test types will result in the first available test being displayed. See Figure . If dashes ever appear, this test is not allowed with engine running.

Four characters of the display will contain a test code to identify the selection. The first 2 characters are letters which identify the system and the test type (i.e. ED for ECM data), last 2 characters numerically identify the test (i.e. ED01 for throttle position). When selecting a specific, the following actions may be taken to control the display: