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!!! SAFETY DISCLAIMER !!!
CAUTION
THE INFORMATION THAT I HAVE PROVIDED IS BASED ON MY OWN EXPERIENCE AND IS TRUE TO THE BEST OF MY KNOWLEDGE AND EXPERIENCE.
PLEASE TAKE ADEQUATE PRECAUTIONS BEFORE ATTEMPTING AUTO REPAIR.
FOR EXAMPLE USE EAR,EYE,BREATHING PROTECTION,KEEP A FIRE EXTINGUISHER HANDY,NO SMOKING,NO LOOSE CLOTHING,BATTERY DISCONNECTED,NO DISTRACTIONS,PROPER DISPOSAL OF DISCARDED LIQUIDS AND SOLIDS,GOOD HEALTH AND FITNESS,DO NOT OVERSTRAIN YOURSELF
PERFORMING THE FOLLOWING REPAIRS IS ENTIRELY AT YOUR DISCRETION
CONSULT A PROFESSIONAL BEFORE ATTEMPTING ANY REPAIRS
I TAKE NO IMPLIED OR OTHERWISE RESPONSIBILITY FOR ACCURACY OF CONTENT, ANY DAMAGE TO HEALTH OR PROPERTY OR NON CONFORMANCE TO GOVERNMENT RULES AND REGULATIONS ARISING OUT OF CARELESSNESS,INCOMPETENCE,AND NEGLECT .

Note:There may be variations in design during production for improvement in safety,funtionality etc ,these variations may or may not be in your manual ,so don't be alarmed if a certain part looks different(e.g. Fuel sending unit) in a newer Jeep of the same model year.Moreover,be aware of any changes /modifications that have been made by a previous owner.

Tuesday, May 18, 2010

Self Diagnostic Codes 1991 -1995 YJ's

Turn Ignition(without starting) ON.. OFF.. ON.. OFF.. ON. CHECK ENGINE light will flash the following codes for diagnostics. If any trouble codes are stored they will flash just like morse code and after all the codes have been displayed or if there are no codes to show "55" will flash (5 quick flashes...pause...5 quick flashes{Between two diagnostic codes e.g. "21" and "55" there will be a longer pause). Refer to chart for cracking the codes!

Code 11 Probable Cause ........:IGNITION
Code 13 ...................................Manifold Absolute Pressure (MAP) sensor (vacuum).
Code 14................................... M.............A..............P Sensor ( electrical).
Code 15................................... Distance Sensor or Circuit
Code 17................................... Engine running too cool.
Code 21....................................Oxygen Sensor or Circuit.
Code 22....................................Coolant Temperature Sensor or Circuit.
Code 23....................................MAT Sensor or Circuit.
Code 24................................... Throttle Position Sensor(TPS) Sensor or Circuit.
Code 25....................................Automatic Idle Speed Circuit.
Code 27.....................................Fuel InjectorControl.
Code 31....................................EVAP Solenoid or Circuit.
Code 33....................................Air Conditioning Clutch Relay.
Code 41....................................Alternator Field.
Code 42....................................Automatic Shutdown Relay.
Code 44....................................Battery Temperature Sensor.
Code 46....................................Battery Over-Voltage.
Code 47....................................Battery Under-Voltage.
Code 51....................................Oxygen Sensor-Lean Condition Indicated.
Code 52....................................Oxygen Sensor-Lean Condition Indicated.
Code 53.................................. Internal Engine Controller fault.
Code 55....................................END OF CODE OUTPUT.
Code 62....................................Emissions Maintenance Reminder(EMR) milage accumulator.
Code 63....................................Controller Failure EEPROM write denied.
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