Toronado V6-231 3.8L (1986)
Oil Pressure Gauge: All Technical Service Bulletins
Oil Pressure Gauge - Malfunction
SUBJECT
OIL PRESSURE GAUGE MALFUNCTION
NUMBER: 86-T-15
DATE:
Feb.. 14, 1986
MODELS/YEARS
1986 TORONADO
SECTION:
8D
Early production Toronados are equipped with a three-terminal oil pressure switch part number 25036925 instead of a four-terminal sensor. During
normal operation, the oil pressure will be at midrange on the gauge. When the body computer senses a mid range voltage between 0 and 5 volts instead
of 0 volts (engine not running) or 5 volts (engine running) in the oil gauge circuit, the EEPROM is automatically reprogrammed to operate with a sensor.
The oil pressure sensor is not presently available, therefore after the malfunction in the oil pressure circuit has been corrected, access "BCM DATA" and
observe oil pressure (BD 71). If the pressure indicates 0 (engine not running) and 45 (engine running), clear the malfunction code and no further repairs
are required.
If the pressure indicates 255 after making sure the oil switch connector terminals are clean and/or the oil pressure switch has been replaced, it will be
necessary to replace the EEPROM as instructed in Dealer Information Bulletin 86-I-21.
The diagnosis charts for codes B131 and/or B132 have been revised. Please update pages 8D2-30 and 8D2-31 of your 1986 Oldsmobile New Product
Service Information Manual - Toronado with this revised information.
