Jeep J-10 Series 1982 Technical & Service Manual page 422

U-108 FUEL SYSTEMS
TROUBLE CODE 44
NOTE: IF CODES 44 AND 55 ARE BOTH FLASHED, REPLACE OXYGEN SENSOR AND PERFORM
SYSTEM OPERATIONAL TEST.
• INSTALL TEST BULB
• GROUND'TEST" WIRE.
• CONNECT DWELL METER TO MC SOLENOID (USE-6 CYL SCALE).
• RUN ENGINE ON HIGH STEP OF FAST IDLE CAM AND OBSERVE DWELL.
I
BETWEEN 10°-50°
5o-10°
REPLACE OXYGEN SENSOR
WITH ENGINE IDLING. CHOKE ENGINE.
DWELL INCREASES |
| NO DWELL CHANGE
CHECK FOR AIR LEAK IN VACUUM HOSES
I
DISCONNECT OXYGEN SENSOR CONNECTOR AND
CONNECT TEST LIGHT BETWEEN BATTERY + TERMINAL
AND TAN WIRE TERMINAL IN CONNECTOR (NOT OXYGEN
SENSOR TERMINALS)
NO LEAK|
SEE E2SE CARBURETOR,
CHAPTER IJ
| LEAK
REPAIR AND
RECHECK
DWELL INCREASES
NO DWELL CHANGE
CHECK FOR SHORT TO GROUND IN TAN WIRE TO ECM TERMINAL K.
IF NOT GROUNDED, REPLACE ECM.
CONNECT TEST LIGHT BETWEEN BATTERY + TERMINAL
AND PURPLE LEAD TERMINAL IN CONNECTOR
| light!
NO LIGHT
| REPLACE OXYGEN SENSOR |
CHECK FOR GROUNDED PURPLE WIRE
TO ECM TERMINAL J.
IF NOT GROUNDED, REPLACE ECM. 90769R