CHRYSLER JEEP AW4 Substantial GEAR Commences COMPLAINT Car takes off in large gear in the Overdrive array but will shift manually moving the selector via all the ranges./ Trigger One particular cause may be a resistor pack has shorted inside the brake switch circuit towards the TCM blowing a 15 amp fuse. A different possibility is actually a severed direct battery feed wire on the TCU or a lousy TCU itself. / CORRECTION Take out the panel beneath the glove box and locate the TCU. While in the harness close to the TCU unit there may be a 15 amp in line fuse on the yellow wire with a resistor pack just a minor further down stream to the identical wire. This wire provides battery feed to the TCU from the ignition switch. To check the electrical power circuit, unplug the TCU and flip the ignition towards the "ON" place. With a volt meter set to DC volts, spot the adverse lead to a great identified ground and with all the positive meter lead, verify terminal D16 for battery voltage. Should the fuse is blown, the resistor pack may possibly be shorted to ground or shorted across itself and can should be replaced. The aspect quantity for a new resistor pack is 83504880. Once the fuse and resistor pack are identified to be great, battery voltage ought to be viewed at D16. Terminal C10 need to have battery voltage only once the brake is depressed. When the brake is released C10 ought to drop to 0 volts. If battery voltage isn't witnessed at both D16 or C10 along with the fuse and resistor pack is regarded to get good, the ignition switch or even the wire from your ignition switch is negative and will must be repaired. When the TCU power provide has become verified to get in excellent functioning purchase, road check the vehicle. In the event the vehicle is continuing to get off in 4th gear, test terminal D14 for battery voltage. That is direct battery feed into the TCU and should be sizzling with all the critical on or off. If voltage isn't noticed, run your personal wire into the connector from the battery by a 10 amp fuse along with your done. Even so, in case you nonetheless have 4th gear commences immediately after this repair, either the TCU is bad or other electrical troubles stay. When faced with this particular problem you have three choices/ one. Obtain a scanner that can give you codes or / two. Consider an opportunity and adjust the TCU or / three. Execute a phase by step pin check out on the TCU connector to find out the electrical failure. / Many of the testing will be to be carried out by meticulously back probing each wire with the connector plugged in to the TCU unless otherwise instructed (a company called J.S. Popper in N.J. sells check leads designed to do that sort of work limiting the probability of damaging the wire or connector). Within the chart you might see an asterisk following on the neutral switch and comfort switch checks. If battery voltage will not be observed as indicated in the chart on each sensors, examine for any blown 7.five amp # 13 fuse in the major fuse panel. If every pin check out falls inside the good specification, it is possible to securely say your TCU is really a Transmission Condemned Unit. The next details lists that which may be observed with all the use of a Snap-On Scanner 4.7 or later edition Domestic cartridge./ The following is information and facts that could be observed applying a Snap-On Scanner outfitted which has a four.seven (or later on) version Domestic Cartridge/ JEEP AW4 TRANSMISSION APPLICATION/ 1987-1990 - Jeep two.5L & 4.0L Cherokee & Comanche/ 1991-1993 - Jeep four.0L Cherokee & Comanche/ 1994-1997 - Jeep 4.0L Cherokee/ The AW4 TCU is capable/ If condition ca/ of producing launch creader crp123 price 3 different code types/ "CURRENT CODE" will only be displayed while condition which set it nonetheless exists. / "STORED" CODES" arestored in memory. Condition that caused code to set might or may possibly nonetheless exist./ "STATUS______/______" codes are in codes and data display./ employing code no longer exists, stored code will be erasedafter about 75 essential cycles. / / 1987 TO 1990 CODES/ CODE 700 - SOLENOID FAULTS (ALL three)/ CODE 701 - POWER/COMFORT SWITCH FAULT / CODE 702 - SPEED SENSOR FA/ ULT / CODE 703 - GEAR SELECT FAULT/ CODE 704 - NO SERIAL DATA / CODE 705 - TPS FAULT / CODE 706 - BRAKE. SWITCH FAULT / CODE 707 - TEMP GROUND FAULT/ CODE 708 - WRONG TCM/ CODE 709 - IGNITION LINE OFF WITH Key ON/ CODE 710 - INTERMITTENT SOLENOID FAULT/ 1991 & LATER/ CODE 700 - SOLENOID # 1/ CODE 700 - SOLENOID # 2/ CODE 700 - SOLENOID # 3/ CODE 702 - SPEED SENSOR FAULT/ CODE 703 - GEAR SELECT FAULT / CODE 704 - TPS FAULT / CODE 708 - WRONG TCM/ DATA STREAM PARAMETERS/ BRAKE PRSD/RLSD (Pressed/Released)/ CURRENT GEAR 1st, 2nd, 3rd, 4th/ LOCK-UP ON/OFF/ MODE POWER/COMFORT (1992 & Later always reads energy, switch eliminated)/ MODULE 01/02 (01 = 4.0L, 02 = 2.5L)/ PRNDL PRND, 3, 1-2/ RPM OUTPUT SHAFT RPM/ SOLENOID 1 ON/OFF/ SOLENOID two ON/OFF/ SOLENOID three ON/OFF (TCC)/ TPS STEPS (one by way of seven)/ STATUS____/____ A value other than 0 in first half of display indicates solenoid fault. A value other than 0 in / second half of status display indicates TPS fault. /

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