Regal V6-173 2.8L (1988)
Idle Speed/Throttle Actuator - Electronic: Technical Service Bulletins
Tools - Ground Simulation for IAC Driver
Bulletin:
90-6E-7
Date:
Jan., '90
Ref. No.: 90-057-6E
Corp. Ref. No.: 916531
SUBJECT:
USE OF IAC DRIVER TOOL
MODELS AFFECTED:
1987-88 CENTURYS WITH 2.8L ENGINE (VIN CODE W),
1988-89 REGAL WITH 2.8L ENGINE (VIN CODE W)
1989-90 REGAL WITH 3.1L ENGINE (VIN CODE T)
This bulletin is to inform technicians when using the Idle Air Control (IAC) Driver Tool Number (22M - Concept Technology) or (J 37027 - Kent
Moore) on the 2.8L/3.1L MPFI engines that the Diagnostic Test Terminal must be grounded or Field Service Mode entered if a "Scan Tool" is used.
The grounding procedure is fully explained in the diagnostic charts for Service Manual Sections "6E3-A" (Code 35) and "6E3-C2" (Idle Air Control
(IAC) Circuit). However, the grounding procedure must also be followed when using the tool for other uses such as: Idle (RPM) Control, Generator
Diagnosis, A/C Recharging, etc.
It should also be noted that whenever the IAC system is disconnected or a battery disconnect is made, the "Idle Learn Procedure" in Section "6E3-C2" of
the Service Manual should be followed.
