1989 Jeep Wrangler TSBs
12 Technical Service Bulletins across 5 categories
Engine
5 bulletinsCONCERNS WITH ENGINE COOLANT USAGE.
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*NLM
VARIOUS CAR OWNER'S HAVE EXPRESSED INTEREST IN USING ENGINE COOLANTS MADE WITH PROPYLENE GLYCOL INSTEAD OF ETHYLENE GLYCOL.
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*YC
APPLIES TO VEHICLES EQUIPPED WITH A 4.2L ENGINE AND FEDERAL HIGH ALTITUDE EMISSION CONTROL SYSTEM.
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FUEL VAPORS MAY CAUSE DETERIORATION OF THE PCV HARNESS ASSEMBLY. THE PCV HARNESS ASSEMBLY MUST BE REPLACED AND THE ENGINE IDLE SPEEDS MUST BE RESET.
IT HAS BEEN DETERMINED THAT CERTAIN EMISSION RELATED COMPONENTS OF THE 1989 JEEP EQUIPPED WITH THE 2.5L ENGINE, MAY BE SUSCEPTIBLE TO FAILURE.
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FAILURE OF THESE COMPONENTS MAY CAUSE THE VEHICLE TO BE IN VIOLATION OF CALIFORNIA EMISSIONS STANDARDS. HYDROCARBONS, CARBON MONOXIDE AND OXIDES OF NITROGEN COULD BE ABOVE THE ALLOWABLE LIMITS, WHICH WERE ESTABLISHED TO PROTECT PUBLIC HEALTH FROM THE DANGERS OF AIR POLLUTION. TO CORRECT THIS PROBLEM, DEALERS WILL REPLACE THE OXYGEN SENSOR, CRANKCASE VENTILATION HOSE AND IF EQUIPPED, THE TRANSFER CASE VACUUM HOSE AND FUEL TANK VENT BOOT. IN ADDITION, THE THE EXHAUST MANIFOLD WILL BE CHECKED FOR AN EXHAUST LEAK NOISE AND REPLACED AS RQUIRED. *TW
IT HAS BEEN DETERMINED THAT THE OXYGEN SENSOR ON CERTAIN 1989 JEEP CHEROKEE, COMANCHE AND WRANGLER MODELS EQUIPPED WITH...
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A 2.5L ENGINE MAY BE SUSCEPTIBLE TO FAILURE. FAILURE OF THE OXYGEN SENSOR MAY CAUSE YOUR VEHICLE TO BE IN VIOLATION OF FEDERAL EMISSIONS STANDARDS. TO CORRECT THIS PROBLEM, DEALERS WILL REPLACE THE OXYGEN SENSOR. *TW
Other
3 bulletinsSUBJECT REGARDING WIRE SPLICE REPAIRS.
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*SB
THIS BULLETIN PROVIDES A REVISED WIRE SPLICE PROCEDURE AND RELATED PARTS.
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*TT
UNKNOWN
Body & Paint
2 bulletinsDIFFICULT TO CLEAN LIGHT COLORED "CHALKY" RESIDUE FROM PLASTIC BODY COMPONENTS THAT ARE MOLDED IN BLACK.
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*TW
DIPAP Requirements - Addition of Jeep Wrangler (JL/JK) and Jeep Gladiator (JT) Hard Top and Targa Top Panel Replacements - All Dealers (Rev.
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Infotainment
1 bulletinINFORMATION ON INSTALLATION OF RADIO TRANSMITTING EQUIPMENT.
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*AK
Pre-Delivery & Maintenance
1 bulletinSUPPLEMENTAL INFORMATION TO MANUFACTURER'S RECALL #556.
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*TW