Seville V8-273 4.5L (1989)
Technical Service Bulletin # 90908
Date: 900701
Intermittent Codes E047, B333, B334, B335, B336/B337
Bulletin No.
T-90-90
File in Group
8
Number
117
Corp. Ref. No.
018112
Date
July, 1990
SUBJECT:
CODES E047, B333, B334, B335, B336, AND/OR B337
MODELS AFFECTED:
1986-1990 ELDORADOS AND SEVILLES 1987-1990 ALLANTES
This bulletin supersedes T-89-13 which should be discarded. This bulletin is being updated to include additional model years and to update the diagnosis
information.
Some 1986-1990 Eldorados, Sevilles and 1987-1990 Allantes may experience intermittent setting of data line codes E047, B333, B334, B335, B336
and/or B337. These may all be set at one time or in any combination. Single codes should be diagnosed using the appropriate trouble tree in the Service
Information Manual. In addition to the codes, some of the following may also occur:
^
IPC and/or the CCDIC flashes on and off or bright/dim
^
Fuel gage flashes "E"
^
Trip odometer resets to 0
^
ECC switches to full heat at high blower speed out the front defrost ducts
^
Erroneous displays appear on the CCDIC
^
ECC panel will not respond to pressing of buttons
^
CCDIC may display SYSTEM PROBLEM
These conditions may be caused by either a damaged data line circuit or one of the components connected to the data line. When operating normally, the
serial data line voltage should continually fluctuate from 0 to 5 volts.
Diagnosis:
If the serial data line has been shorted to ground, the voltage at the Assembly Line Data Link (ALDL) will be 0 V. If it has been shorted to voltage, it will
be over 5 V. If one of the components on the serial data line is affecting the data line voltage, the serial data voltage at the ALDL connector will be a
steady value anywhere between .1 and 5 volts (e.g., 2.7V, 4.8V etc.). It has been found that a steady serial data line voltage of 4.7 to 4.9 volts usually
means the BCM is the cause, and .1 to .3 volts usually means the ECM is the cause.
Condition Present:
