940 L4-2.3L SOHC VIN 88 B230F (1992)
Coolant Temperature Sensor/Switch (For Computer): Customer Interest
Engine Controls - Driveability Problems
NUMBER
205/906
GROUP
28
MODEL
200-700/900
TITLE
PROTECTION FOR CONNECTORS
B230F/FT, B234F
1989-->
MARKET
US and Canada
DATE
March 1993
REFERENCE:
TP 31903/1 (ENGLISH); 09/91; FUEL SYSTEM REGINA IGNITION
SYSTEM REX-I
TP 31354/2 (ENGLISH); 09/90; FUEL SYSTEM LH JETRONIC 2.4 AND ELECTRONIC TURBO CONTROL UNIT
TP 31621/1 (ENGLISH); 06/90; EZ 116 K IGNITION SYSTEM
TP 31361/1 (ENGLISH); 12/88; LH-JETRONIC 2.4 FUEL SYSTEM
TP 31079/1 (ENGLISH); 10/88; EZ 116 K IGNITION SYSTEM
Protection for connectors on the B23OF/FT, B234F engines
The engine management system connectors/components should be cleaned and protected if oxidation or driveability problems are encountered. If
diagnostic trouble codes (DTCs) have been recorded although no fault is detected, connectors/components should also be cleaned and protected. The
application of grease to connectors improves their long term reliability. The connectors shown in this service bulletin are of the type used in LH engine
management systems. The corresponding connectors in REX/Regina systems may be protected in the same manner.
Material
P/N
Rust remover
1161435-1 or 1161034-2
Low-temperature grease
1161417-9 or 1161236-3
Caution:
Do not use rust remover or grease on the heated oxygen sensor (HO2S) connectors.
B230F/FT, B234F ENGINE
Power space, idle air control valve (IAC valve), throttle position switch (TP switch), engine coolant temperature sensor (ECT sensor), engine speed
sensor (RPM sensor), knock sensor, EGR temperature sensor and mass air flow sensor (MAF sensor) connectors should be protected.
Caution:
Care should be taken not to damage or misplace the seals when disconnecting connectors.
Greasing of the above connectors has been introduced in production from the following chassis no.:
240: 482738 (4 door)
240: 947845 (5 door)
940: 128400 (4 door)
940: 079100 (5 door)
Procedure
