240SX L4-2389cc 2.4L SOHC MFI (KA24E) (1989)
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Technical Service Bulletin # EF89004
Date: 890518
Multiple Systems - Changes For Improved Durability
Classification:
Section: Engine Fuel &
EF&EC89-004
Emission Control
Reference:
TECHNICAL BULLETIN
TS89-072
Models:
1989 240SX
Date:
May 18, 1989
KA24E ENGINE CHANGE
APPLIED MODEL: 1989 240SX (S13) from engine number KA24-012039*
SERVICE INFORMATION
To improve driveability the KA24E engine on the applied model has been changed as follows:
^
Compression ratio has been changed (9.1 to 8.6).
^
Air temperature sensor has been added.
^
E.C.U. has been changed.
^
Idle speed.
^
Self-diagnosis for E.G.R.
The following pages reflect these changes.
CONTENTS
Compression Pressure - Measurement ......................................
2
-
General Specifications............................ 3
Engine and Emission Control Overall System
E.C.C.S. Component Parts Location ...................................
4
System Diagram ......................................................
5
System Chart ........................................................
6
Circuit Diagram .....................................................
7
Engine and Emission Control Parts Description
Air Temperature Sensor ..............................................
8
Engine and Emission Control System Description
Ignition Timing Control .............................................
9
Swirl Control Valve (S.C.V.) Control ................................
11
Fail-safe System ....................................................
12
Idle Speed/Ignition Timing/Idle Mixture Ratio Inspection ................
13
Trouble Diagnoses
Self-diagnosis - Mode III (Self-diagnostic System) ..................
15
Diagnostic Procedure 8 ..............................................
16
Diagnostic Procedure 24 .............................................
19
Electrical Components Inspection ....................................
21
Service Data and Specifications .........................................
23
Please reference this Bulletin on the Contents pages of the EM and EF&EC Sections of the 1989 240SX Service Manual.
*Vehicles with an Air Temperature Sensor on the air cleaner box have the modified engine.
Compression Pressure
