Engine - Idle Speed Dip When Cooling Fan Engages: Overview

SECTION
2

GROUP
28

NO.
916

DATE
March 1995

RE:
MFI LH 2.4.4 EPROM exchange for idle speed dip
when cooling fan engages.
900
M/Y 1992- B230FT

REFERENCE: TP 3204311, SECTION 2 (23, 28) MULTIPORT FUEL INJECTION (MFI) SYSTEM LH 2.4, 700/900 1989-

MFI LH 2.4.4 EPROM exchange

When the cooling fan engages, the voltage supply to the idle air control (IAC) valve momentarily dips.

If this happens in hot climate with the Air Conditioning engaged, the idle speed might dip, which might cause body vibrations.




EPROM Application Chart

WARRANTY STATEMENT: Claims may be submitted under the New Car Limited Warranty when a manufacturing defect is present using claim type: 01

Operation No. 02383-6
Labor Description E-PROM exchange
Time Allowance 0.5 hr