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Jeep Wrangler YJ
YJ General Discussion
Rare 1995 Jeep YJ sahara (stalling problem)
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<blockquote data-quote="deadpool1" data-source="post: 439323" data-attributes="member: 21229"><p>I Have the M/T stick shift version of yours. </p><p>and the time to diagnose any car that stalls. is when it stalls. hot.</p><p>there are many points of failure, on cars. lucky not so many 1995 only one COMPUTER here, and a huge blessing that.</p><p></p><p>So it stalls hot and fails to restart right>? and as it stalls a fast right foot does not allow you to keep it going.</p><p>step 1 is, it stalls and you then test for spark, as we did now for 100 years. Henry Ford and on.</p><p></p><p>see this 13 year old video of scotty, and checking spark. watch him then do the same on any car that stalls. </p><p>and fails to start,.</p><p></p><p><a href="http://scotty watch him." target="_blank">https://www.youtube.com/watch?v=064Ilsz8Fzg</a></p><p></p><p>I presume i can post a video. after all why repeat the same test here, as we did for 100 year, again. I have nothing to sell ever. !</p><p></p><p><strong>no loss of power..???</strong> no sure what means,, a dead engine is 100% loss off power so you meant I guess, no loss of main 12vdc POWER.</p><p></p><p></p><p></p><p>next question,at dead engine.</p><p>key ON the CEL lamp must glow or PCM is dead or 12dc power to it or PCM ground is bad,, does it?</p><p>then do the key on 3 times trick. make sure code for no DTC errors happens.</p><p></p><p>crank the dead engine for 5 full seconds</p><p>then do this,....</p><p>if you get nothing from the PCM (flash codes) the PCM CAPS are bad. (electrolytic caps) or all power pins/grounds to PCM are bad.</p><p>also if you think PCM is dead the why not cause a gross error. to force a DTC code to happen.</p><p></p><p>unplug map conn. and crank /?</p><p>if spark is dead we fix that first. cant burn gasoline lacking spark.</p><p>the fuel but of PCM see spark dead it cuts fuel hard. hard logic in PCM does that and the ASD drops out.</p><p>The PCM ASD drops of for 02 shorts or any device on output of ASD that overloads the ASD the PCM seen that and shuts the ASD down.</p><p>that is enough for now.</p><p></p><p>check spark first. ok? and if spark is dead we work just that to the logicial conclusion every time (not once have I failed to find it)</p><p> </p><p>DTC checks. flash codes.</p><p>my personal 95cheat sheet TDC how</p><p></p><p>PROCEDURES 1995 (below) pasted.</p><p>ACCESSING DIAGNOSTIC TROUBLE CODES</p><p>A stored Diagnostic Trouble Code (DTC) can be dis-</p><p>played by cycling the ignition key On-Off-On-Off-On</p><p>within three seconds and observing the malfunction</p><p>indicator lamp. This lamp is displayed on the instru-</p><p>ment panel as the CHECK ENGINE lamp (Figs. 5 or</p><p>6).</p><p>They can also be displayed through the use of the</p><p>Diagnostic Readout Box (DRB) scan tool. The DRB</p><p>connects to the data link connector in the engine</p><p>compartment (Figs. 7 or 8). For operation of the</p><p>DRB, refer to the appropriate Powertrain Diagnostic</p><p>Procedures service manual.</p><p></p><p>CODES</p><p>DTC</p><p>12- BATTERY FAILED, OR REMOVED./</p><p>55- EOC END OF CODES. FLAG</p><p>List of codes/standard meanings:</p><p>the CEL must not blink in random fashion ever, or PCM is sick (power bad to it or caps dried out)</p><p></p><p></p><p>11: No ignition reference signal detected during cranking (bad hall effect) OR timing belt?(none) skipped one or more teeth; or intermittent loss of either camshaft or crankshaft position sensor</p><p>12: Memory Standby power lost (Battery or computer recently disconnected)</p><p>13: No change in Manifold Absolute Pressure sensor (MAP) from start to run</p><p>14: MAP sensor circuit open or shorted; voltage too low</p><p>15: No speed/distance sensor signal</p><p>16: Loss of battery voltage detected with engine running</p><p>17: Engine stays cold too long (bad thermostat)</p><p>21: Oxygen sensor signal out of range, possibly shorted</p><p>22: Coolant sensor signal out of range (or disconnected to set timing)</p><p>23: Intake air temperature signal out of range</p><p>24: Throttle position circuit out of range</p><p>25: Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached, vacuum leak found</p><p>26: Peak injector circuit voltage has not been reached</p><p>27: Logic module fuel circuit internal problem or TBI injector does not respond properly to control signal</p><p>31: Evaporator Purge solenoid circuit open or shorted or Evaporator solenoid circuit</p><p>32: EGR system failure or Power loss lamp open or shorted (ENDED 1991)</p><p>33: Air conditioning clutch relay circuit open or shorted ( Also will show up for rigs without AC)</p><p>34: Speed control vacuum or vent solenoid circuits open or shorted(CRUISE)</p><p>35: Cooling fan relay circuit open or shorted</p><p>36: Wastegate control circuit open or shorted,TURBO. DREAMS</p><p>37: Shift indicator light failure, 5-speed (blown bulb) OR Park/neutral switch failure OR Torque converter unlock circuit open or shorted, A-413 4-speed auto</p><p>41: Alternator field control circuit open or shorted</p><p>42: Automatic shutdown relay circuit open or shorted(OR OVERLOADED)</p><p>42: Fuel pump relay control circuit</p><p>42: Fuel level unit - no change over miles OR Z1 voltage missing when auto shut-down circuit energized</p><p>43: Peak primary IGNITION coil current not achieved with max dwell time OR Cylinder misfire</p><p>43: Problem in power module to logic module interface</p><p>44: No FJ2 voltage present at logic board OR Logic module self-diagnostics indicate problem OR Battery temperature out of range</p><p>45: Turbo boost limit exceeded (engine was shut down by logic module)</p><p>46: Battery voltage too high during charging or charging system voltage too low</p><p>47: Battery voltage too low and alternator output too low</p><p>51: Oxygen sensor stuck at lean position OR Internal logic module fault ('84 turbo only)</p><p>52: Oxygen sensor stuck at rich position OR Internal logic module fault ('84 turbo only)</p><p>53: Logic module internal problem</p><p>54: No sync pickup signal during engine rotation (turbo only) OR Internal logic module fault ('1984 turbo only)</p><p>55: End of codes</p><p>61: "Baro" sensor open or shorted</p><p>62: EMR mileage cannot be stored in EEPROM</p><p>62: PCM failure SRI mile not stored</p><p>63: Controller cannot write to EEPROM</p><p>64: Catalytic converter efficiency failure</p><p>65: Power steering switch failure</p></blockquote><p></p>
[QUOTE="deadpool1, post: 439323, member: 21229"] I Have the M/T stick shift version of yours. and the time to diagnose any car that stalls. is when it stalls. hot. there are many points of failure, on cars. lucky not so many 1995 only one COMPUTER here, and a huge blessing that. So it stalls hot and fails to restart right>? and as it stalls a fast right foot does not allow you to keep it going. step 1 is, it stalls and you then test for spark, as we did now for 100 years. Henry Ford and on. see this 13 year old video of scotty, and checking spark. watch him then do the same on any car that stalls. and fails to start,. [URL='http://scotty watch him.']https://www.youtube.com/watch?v=064Ilsz8Fzg[/URL] I presume i can post a video. after all why repeat the same test here, as we did for 100 year, again. I have nothing to sell ever. ! [B]no loss of power..???[/B] no sure what means,, a dead engine is 100% loss off power so you meant I guess, no loss of main 12vdc POWER. next question,at dead engine. key ON the CEL lamp must glow or PCM is dead or 12dc power to it or PCM ground is bad,, does it? then do the key on 3 times trick. make sure code for no DTC errors happens. crank the dead engine for 5 full seconds then do this,.... if you get nothing from the PCM (flash codes) the PCM CAPS are bad. (electrolytic caps) or all power pins/grounds to PCM are bad. also if you think PCM is dead the why not cause a gross error. to force a DTC code to happen. unplug map conn. and crank /? if spark is dead we fix that first. cant burn gasoline lacking spark. the fuel but of PCM see spark dead it cuts fuel hard. hard logic in PCM does that and the ASD drops out. The PCM ASD drops of for 02 shorts or any device on output of ASD that overloads the ASD the PCM seen that and shuts the ASD down. that is enough for now. check spark first. ok? and if spark is dead we work just that to the logicial conclusion every time (not once have I failed to find it) DTC checks. flash codes. my personal 95cheat sheet TDC how PROCEDURES 1995 (below) pasted. ACCESSING DIAGNOSTIC TROUBLE CODES A stored Diagnostic Trouble Code (DTC) can be dis- played by cycling the ignition key On-Off-On-Off-On within three seconds and observing the malfunction indicator lamp. This lamp is displayed on the instru- ment panel as the CHECK ENGINE lamp (Figs. 5 or 6). They can also be displayed through the use of the Diagnostic Readout Box (DRB) scan tool. The DRB connects to the data link connector in the engine compartment (Figs. 7 or 8). For operation of the DRB, refer to the appropriate Powertrain Diagnostic Procedures service manual. CODES DTC 12- BATTERY FAILED, OR REMOVED./ 55- EOC END OF CODES. FLAG List of codes/standard meanings: the CEL must not blink in random fashion ever, or PCM is sick (power bad to it or caps dried out) 11: No ignition reference signal detected during cranking (bad hall effect) OR timing belt?(none) skipped one or more teeth; or intermittent loss of either camshaft or crankshaft position sensor 12: Memory Standby power lost (Battery or computer recently disconnected) 13: No change in Manifold Absolute Pressure sensor (MAP) from start to run 14: MAP sensor circuit open or shorted; voltage too low 15: No speed/distance sensor signal 16: Loss of battery voltage detected with engine running 17: Engine stays cold too long (bad thermostat) 21: Oxygen sensor signal out of range, possibly shorted 22: Coolant sensor signal out of range (or disconnected to set timing) 23: Intake air temperature signal out of range 24: Throttle position circuit out of range 25: Automatic Idle Speed (AIS) motor driver circuit shorted or target idle not reached, vacuum leak found 26: Peak injector circuit voltage has not been reached 27: Logic module fuel circuit internal problem or TBI injector does not respond properly to control signal 31: Evaporator Purge solenoid circuit open or shorted or Evaporator solenoid circuit 32: EGR system failure or Power loss lamp open or shorted (ENDED 1991) 33: Air conditioning clutch relay circuit open or shorted ( Also will show up for rigs without AC) 34: Speed control vacuum or vent solenoid circuits open or shorted(CRUISE) 35: Cooling fan relay circuit open or shorted 36: Wastegate control circuit open or shorted,TURBO. DREAMS 37: Shift indicator light failure, 5-speed (blown bulb) OR Park/neutral switch failure OR Torque converter unlock circuit open or shorted, A-413 4-speed auto 41: Alternator field control circuit open or shorted 42: Automatic shutdown relay circuit open or shorted(OR OVERLOADED) 42: Fuel pump relay control circuit 42: Fuel level unit - no change over miles OR Z1 voltage missing when auto shut-down circuit energized 43: Peak primary IGNITION coil current not achieved with max dwell time OR Cylinder misfire 43: Problem in power module to logic module interface 44: No FJ2 voltage present at logic board OR Logic module self-diagnostics indicate problem OR Battery temperature out of range 45: Turbo boost limit exceeded (engine was shut down by logic module) 46: Battery voltage too high during charging or charging system voltage too low 47: Battery voltage too low and alternator output too low 51: Oxygen sensor stuck at lean position OR Internal logic module fault ('84 turbo only) 52: Oxygen sensor stuck at rich position OR Internal logic module fault ('84 turbo only) 53: Logic module internal problem 54: No sync pickup signal during engine rotation (turbo only) OR Internal logic module fault ('1984 turbo only) 55: End of codes 61: "Baro" sensor open or shorted 62: EMR mileage cannot be stored in EEPROM 62: PCM failure SRI mile not stored 63: Controller cannot write to EEPROM 64: Catalytic converter efficiency failure 65: Power steering switch failure [/QUOTE]
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YJ General Discussion
Rare 1995 Jeep YJ sahara (stalling problem)
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