nissan Workshop Repair Guides

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Engine Control Module: Customer Interest
Engine Controls - Idle Fluctuation

Classification:

EF&EC91-001

Section:

Emission Control

Reference:

TECHNICAL BULLETIN NTB91-022

Models:

1989-90 240SX

Date:

March 7, 1991

240SX IDLE FLUCTUATION

APPLIED MODEL: 1989-90 240SX (S13)

APPLIED DATE: Federal  -

June 8, 1990

Calif.   -

All 89-90

APPLIED VINS:

Federal  -

JN1HS34P*LW 109709

-

JN1HS36P*LW 153129

Calif.   -

All 89-90

SERVICE INFORMATION

Some 1989-90 240SX vehicles produced before the applied date may experience idle fluctuation when coming to a stop (engine warm) or after a warm
restart. If this occurs, perform the following service procedure.

SERVICE PROCEDURE

1.

Verify proper adjustment of the engine control components and idle speed according to Service Manual specifications and adjustment
procedures.

2.

If these components are within specification and self diagnosis indicates code 55 (all clear) in mode III, replace the ECU with the new part listed
below.

PARTS INFORMATION

MODEL

CALIBRATION

NEW PART

FORMER PART

M/T

Federal

2371M-40F08RE

23710-40F05

California

2371M-42F08RE

23710-42F05

A/T

Federal

2371M-4OF68RE

23710-40F65

California

2371M-42F66RE

23710-42F65

Powertrain Management > Relays and Modules - Powertrain Management > Relays and Modules - Computers and Control Systems > Engine Control Module > Component Information > Technical Service Bulletins > Customer Interest: > EF91001 > Mar > 91 > Engine Controls - Idle Fluctuation

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