Tools - Ground Simulation for IAC Driver

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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.