Engine Controls - Revised Diagnostic Chart A3, No Start

9226buick03

Bulletin: 89-6E-28

Date: Apr. '90

Ref. No.: 89-283-6E

Corp. Ref. No.: 016506


SUBJECT:
SERVICE MANUAL UPDATE - SECTION 6E - DRIVEABILITY AND EMISSIONS SENSOR VOLTAGE OUTPUT SPECIFICATIONS

MODELS AFFECTED:
1987-89 SKYHAWK WITH 2.0L ENGINE (VIN CODE 1)
1987 CENTURY WITH 2.8L ENGINE (VIN CODE W)
1988 REGALS WITH 2.8L (VIN CODE W) OR 3.1L (VIN CODE T) ENGINES


YEAR ENGINE CARLINES SECTION TEXT

1987-89 2.0L Skyhawk Chart A-3 Page 2 of 3

1987 2.8L Century Chart A-3 Page 3 of 3

1988-90 2.8L/3.1L Regal Chart A-3 Page 3 of 3

The following crank sensor voltage output specifications have been updated for applications listed above. This updated information should be noted in the appropriate "Engine Cranks But Will Not Run" Chart A-3, in the "Driveability And Emissions" Section "6E" of the Service Manual.

- Normal crank sensor voltage output range (room temperature/charged battery) .8 volt (800 mv) - 1.4 volts (1400 mv).

- Minimum crank sensor voltage output (slow cranking/low battery) .3 volt (300 mv).