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1999 Jeep Grand Cherokee Limited AUTOMATIC TRANSMISSIONS Chrysler 45RFE Electronic Controls Repair Manual

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Filed Under (Jeep Manuals) by admin on 11-07-2012

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INTERNAL TCM Circuit Description The TCM is reporting internal errors. Diagnostic Procedure 1. Turn ignition switch to LOCK position. Remove transmission control relay. Measure resistance between ground and relay ground circuit (Black/Yellow wire) in relay connector. If resistance is greater than 5 ohms, repair open circuit. If resistance s not greater than 5 ohms, go to next step. 2. The TCM has an internal problem and must be replaced. P0715: INPUT SPEED SENSOR ERROR Circuit Description DTC P0715 will set if an excessive change in input RPM has been detected in any gear. Possible Causes * Intermittent wiring and connector problems. * Faulty input speed sensor. * Input speed sensor circuits shorted to ground, shorted to voltage, or open. * Faulty TCM. Diagnostic Procedure 1. Place gear selector in “P” position and start engine. Using scan tool, monitor input speed sensor value. If value is less than 400 RPM, go to next step. If value is not less than 400 RPM, go to step 9. 2. Turn ignition switch to LOCK position. Install Transmission Simulator (8333). Turn ignition on. Using transmission simulator, turn rotary knob to middle (1000/3000) position. Turn INPUT/OUTPUT switch on. Using scan tool, monitor input and output speed sensor values. If input speed sensor value is 2950- 3050 RPM and output speed sensor value is 950-1050 RPM, replace input speed sensor. If speed sensor values are not as specified, go to next step. 3. Turn ignition switch to LOCK position. Disconnect TCM harness connector. Remove transmission control relay. Using fused jumper wire, jumper fused B+ circuit (Red/White wire) and transmission relay output circuit (Red wire) together at relay connector. Turn ignition on. Measure voltage between ground and input speed sensor signal circuit (Red/Black wire) at TCM harness connector. If voltage is greater than 3 volts, repair circuit for short to voltage. If voltage is not greater than 3 volts, remove jumper wire, install relay and go to next step. 4. Turn ignition switch to LOCK position. Disconnect input speed sensor harness connector. Measure resistance of input speed sensor signal circuit (Red/Black wire) between TCM and input speed sensor. If resistance is greater than 5 ohms, repair open circuit. If resistance is not greater than 5 ohms, go to next step. 5. Measure resistance of input speed sensor ground circuit (Dark Blue/Black wire) between TCM and input

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1999-2006 Volkswagen A4 Engine Speed Sensor G28 Checking

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Filed Under (Volkswagen Manuals) by admin on 31-01-2011

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Special tools, testers and auxiliary items required Multimeter . Wiring diagram. Test requirements The Motronic Engine Control Module (ECM) J220 fuses OK. Battery voltage at least 12.5 volts. All electrical consumers such as, lights and rear window defroster, switched off. Vehicles with automatic transmission, shift selector lever into position “P” or “N” . A/C switched off. Ground (GND) connections between engine/transmission/chassis OK. Ignition switched off. Test procedure Perform a preliminary check to verify the customers complaint. Refer to Preliminary Check Start diagnosis The Engine Speed (RPM) Sensor G28 detects RPM and reference marks. Without an engine speed signal, the engine will not start. If the engine speed signal fails while the engine is running, the engine will stop immediately Function test Connect the scan tool. Switch the ignition on. Using the scan tool, check the engine speed: End diagnosis and switch ignition off. If the specified value was not obtained: Checking internal resistance Disconnect the gray Engine Speed (RPM) Sensor G28 electrical harness connector 7 arrow 7 . Using a multimeter , check the Engine Speed (RPM) Sensor G28 terminals 2 to 3 7 see insert 7 for resistance. Specified value: 0.7 to 1000 kOhm Check Engine Speed (RPM) Sensor G28 terminals 1 to 2 and 1 to 3 for short circuits. Specified value: ? (infinity) If any of the specified values are not obtained: Replace the Engine Speed (RPM) Sensor G28 . Refer to Engine Mechanical, Fuel Injection and Ignition 7 Repair Group 13 . If the specified values are obtained: Checking wiring If the manufacturers test box is being used. Perform the following step. Install the test box Adapter F/VAG1598 (68 Pin) VAG1598/22 . If the manufacturers test box is not being used. Perform the following step. Remove the Motronic Engine Control Module (ECM) J220 . Refer to Motronic Engine Control Module J220, Replacing .

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1993-2002 Volkswagen Golf, Jetta, GTI, Cabrio A/C controls and mechanical components service manual

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Filed Under (Volkswagen Manuals) by admin on 09-07-2012

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1 – . Dust and pollen filter Where applicable 2 – . Plenum cover Removing/installing – -”> 3 – Evaporator water drain valve Located behind bulkhead insulation Removing/installing Fig. 2 Removing and installing evaporator water drain valve 4 – . Heater core connections and vacuum hose guide 5 – . Fresh Air/Recirculating Flap Two-Way Valve N63 Valve open when voltage applied Vacuum hose layout Vacuum hose layout 6 – . Coolant Fan Control (FC) Control Module J293 With fuse Fuse Strip S88 (1993 m.y.) With fuses Coolant Fan Second and Third Speed Fuse S107 and Coolant Fan First Speed and A/C Clutch Fuse S108 (1994 m.y. micro ) Connector terminal identification: micro 09.93 Fig. 5 Connector terminal identification of Coolant Fan Control (FC) Control Module J293 ( 09.93) 10.93 micro Fig. 6 Connector terminal identification of Coolant Fan Control (FC) Control Module J293 (10.93 ) 7 – . Vacuum reservoir Insert vacuum hose 30 mm (1.2 in.) into reservoir Removing/installing Fig. 7 Removing and installing vacuum reservoir A/C and heating system components, engine compartment Vacuum hose Vacuum hose layout Vacuum hose layout 9 – . A/C Cut-Out Thermal Switch F163 and Third Speed Coolant Fan Control (FC) Thermal Switch F165 A/C Cut-Out Thermal Switch F163 only on vehicles with engine codes AAA, AAZ, ABA, ACC A/C Cut-Out Thermal Switch F163 switches A/C Clutch N25 off at high engine coolant temperature; OFF (switch open) above 119 degree C (246 degree F); ON (switch closed) below 112 degree C (234 degree F) Third Speed Coolant Fan Control (FC) Thermal Switch F165 only on vehicles with 3- speed coolant fan motor Third Speed Coolant Fan Control (FC) Thermal Switch F165 switches radiator coolant fan to 3rd speed as engine coolant temperature increases; 3rd speed ON (switch closed) above 112 degree C (234 degree F); OFF (switch open) below 108 degree C (226 degree F) Removing and installing (engine code AAA) Fig. 3 Removing and installing A/C Cut- Out Thermal Switch F163 and Third Speed Coolant Fan Control (FC) Thermal Switch F165 (2.8 liter VR6 engine code AAA) Removing and installing (engine code ABA) Fig. 4 Removing and installing A/C Cut- Out Thermal Switch F163 (2.0 liter engine code ABA) 10 – . Condenser* 11 – . Pressure relief valve*

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1992 Toyota Truck Pickup 2WD Cooling and Exhaust Engine Ignition Timing Adjustments Manual

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Filed Under (Toyota Manuals) by admin on 15-03-2012

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1. Connect a tachometer test probe to terminal IG of the check connector, Fig. 211 2. NOTE: Never let the tachometer lead touch ground as this could cause damage to the igniter and/or coil. Be sure to check that your tachometer is compatible with this ignition system. Consult the operating manual for your instrument. Service Check Connector 3. Fig. 223 Ignition Timing (10) Check idle speed . 4. Idle Speed : 800 rpm Using a timing light, verify that the timing mark on the timing cover is aligned with the mark on the crankshaft pulley, Fig. 223 5. Ignition Timing: 10°BTDC at idle Tighten the distributor bolt and recheck the ignition timing. 6. Remove service wire. 7. Check idle advance timing with service wire removed. 8. Ignition Timing: 8°BTDC at idle Check idle speed and adjust if necessary, COMPUTERIZED ENGINE CONTROLS. 9. Disconnect tachometer and timing light from engine. 10. Timing Belt Removal Notes Fan Shroud Removal & Installation Remove radiator fan upper and lower shrouds. 1. Installing Power Steering Pump And Belt Remove power steering pump drive belt and pump. 2. Disconnect No. 2 and No. 3 air hoses from air pipe. 3. 4. Fan Removal Remove alternator drive belt , cooling fan, belt guide and fan pulley. 5. Remove No. 2 timing belt cover. 6. Fig. 6 Aligning Timing Marks Place No. 1 cylinder at TDC of compression stroke by turning the crankshaft pulley and aligning pulley groove with the “0” mark on the No. 1 timing belt cover. Ensure alignment marks on the camshaft timing sprockets and the No. 3 timing belt cover are correctly aligned, Fig. 6. 7. If not, turn the crankshaft pulley one complete revolution. 8. Crankshaft Pulley Removal

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1984 Mercedes Benz 190E Fuel Delivery and Air Induction Engine Testing And Adjustment Manual

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Filed Under (Mercedes-benz Manuals) by admin on 13-04-2012

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Note: Test and adjust lambda control with a lambda control tester. The lambda control and the idle speed emissions level must not be tested when the engine is very hot, e.g. immediately after driving sharply or after measuring engine output on the dynamometer. Testing, adjusting 1 Complete measurement sheet. 2 Switch off air conditioning or automatic climate control. Move selector lever into position “P”. 3 Read out DTC memory. Note: Not available on model year 1984-1986. 4 Connect testers: oil remote thermometer (018)124 589 07 21 00 lambda control tester (012) twin socket (031) trigger clamp (011) exhaust probe (005)126 589 11 63 00 CO measuring instrument (006) engine tester with oscilloscope (030) multimeter (003) test cable (033)102 589 04 63 00. 5 Position extraction device (014) at exhaust tail pipe. 6 Check engine coolant level, adjust to correct level. 7 Check engine oil level, pay attention to condition of oil (visual inspection). 8 Take off air cleaner. 9 Check ease of movement and condition of throttle control linkage and throttle valve. Grease all bearing points and ball sockets. 10 Check fulcrum lever, adjust. Check whether the roller (15) in the fulcrum lever (13) is resting free of tension against end stop. Adjust fulcrum lever (13) with the connecting rod (2), if necessary, so that the roller (15) is resting free of tension against end stop. 11 Idle stop. Check whether the throttle valve is resting against idle stop. Disconnect connecting rod (2) for this step. Adjust throttle control. Engines with cruise control only. Check whether the actuator is resting against idle stop of cruise control by pressing the lever of the actuator clockwise against idle stop at cruise control. When attaching the connecting rod (21), ensure that the lever of the actuator is lifted approx. 1 mm off the idle stop at the cruise control. Adjust tie rod, if necessary. Adjust throttle control. 12 Check wide open throttle stop from the accelerator pedal , adjust. 13 Voltages Test (battery and ignition coil ): No-load voltage Connect voltmeter to the battery, paying attention to the polarity, and take reading of voltage. Specification: 12.2 volts . Ignition coil Switch on ignition with engine not running. Test the voltage terminal 15 to ground at contact 5 of diagnostic connector. Specification: battery voltage Test difference in voltage between terminal 15 and terminal 1 at contacts 5 and 4 of diagnostic connector. Specification: 0 volts If the specified values are not reached, test

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HIGH TECH DUAL QUAD THROTTLE LINKAGE KIT INSTALLATION MANUAL

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Filed Under (More Manuals) by admin on 24-02-2012

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INSTALLATION 1. This kit contains all the necessary parts to operate Edelbrock carburetors in a progressive or 1: 1 type operation. Figure 1 illustrates typical progressive type installation in which the rear carburetor is the primary carb. This simplifies linkage attachment to the vehicle’s existing throttle linkage. 2. Before attaching anything to the carburetors, loosely assemble the major components of the linkage kit using Figure 1 as a guideline. Note that the longer rod will go to the rear carb with the flat facing down, and the short rod goes to the front carb with the flat facing up. The brass bearing blocks should be positioned so that the set screws will tighten against the flat of the short rod, i.e., both bearing block set screws will be up. Attach the aluminum collar to the long rod between the bearing blocks with the set screw against the flat. 3. Attach the linkage assembly to the carbs with the 10-24 allen head screws and locknuts. Attach to the rear carb using one of the brass 518″ O.D. x 3/16″ I.D. shoulder spacers and the tapered brass anti-rotation shoulder spacer in the top hole of the throttle arm (112″ diameter). Note that the shoulder spacer goes on the inside and the anti-rotation spacer goes on the outside of the throttle arm. Attach to the front carb using the 3/16″ hole just below the large hole in the throttle arm. ADJUSTMENT – NOTE: If carburetors are full of fuel, place rags in the carb throats to absorb the fuel discharged when working the throttle linkage. This will prevent flooding and possible damage to the piston rings upon start-up. Be sure to remove the rags before starting engine. 1. Tighten the set screw and locknut on the rear bearing block, making sure that the bearing block is close to the end of the shaft from the front carburetor. 2. Push the throttle arms of both carbs to WOT (Wide Open Throttle), then adjust the aluminum collar to touch the rear brass bearing block. Securely tighten the set screw and locknut on the aluminum collar. 3. Let both throttle arms return to idle position, then adjust the front brass bearing block to almost touch the aluminum collar. Leave about .020″-.030″ clearance to allow for independent idle speed adjustment of each carburetor. Tighten all set screws, locknuts, and bolts at this time. 4. Check for smooth operation of linkage from idle to WOT and note that the rear carb will open about 20″ before starting to open the front carb. Both carbs should reach WOT at the same time. 5. IMPORTANT: Attach a return spring to both carburetors as shown in Figure 1. Use the return spring brackets supplied, bending as necessary for attachment to your engine. Generally the brackets can be attached to the intake manifold using the existing bolts. Use the longer or shorter spring on either the front or rear carburetor as required for your particular application. Check for smooth operation and positive return to idle. 6. Attach existing throttle linkage to rear carburetor using the 3/16″ hole below the large hole in the throttle arm. It may be necessary to shorten your existing linkage rod or cable, or to use an aftermarket cable mounting plate. BEFORE STARTING ENGINE, DOUBLE-CHECK FOR SMOOTH OPERATION OF LINKAGE FROM IDLE TO WIDE OPEN THROTTLE AND FOR POSITIVE RETURN TO IDLE. OPTIONAL 1:l INSTALLATION If 1:l linkage is desired, assemble and attach linkage kit as above, except that the attachment point to the front carburetor’s throttle arm will be the large 112″ hole using the other two 518″ O.D. x 3/16″ I.D. shoulder spacers (similar to the rear carburetor). Adjust the bearing blocks to eliminate all freeplay, so that all motion to the rear carburetor’s throttle arm is transmitted directly to the front carb’s throttle arm

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HIGH TECH DUAL QUAD THROTTLE LINKAGE KIT INSTALLATION INSTRUCTIONS

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Filed Under (More Manuals) by admin on 02-01-2012

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INSTALLATION 1. This kit contains all the necessary parts to operate Edelbrock carburetors in a progressive or 1: 1 type operation. Figure 1 illustrates typical progressive type installation in which the rear carburetor is the primary carb. This simplifies linkage attachment to the vehicle’s existing throttle linkage. 2. Before attaching anything to the carburetors, loosely assemble the major components of the linkage kit using Figure 1 as a guideline. Note that the longer rod will go to the rear carb with the flat facing down, and the short rod goes to the front carb with the flat facing up. The brass bearing blocks should be positioned so that the set screws will tighten against the flat of the short rod, i.e., both bearing block set screws will be up. Attach the aluminum collar to the long rod between the bearing blocks with the set screw against the flat. 3. Attach the linkage assembly to the carbs with the 10-24 allen head screws and locknuts. Attach to the rear carb using one of the brass 518″ O.D. x 3/16″ I.D. shoulder spacers and the tapered brass anti-rotation shoulder spacer in the top hole of the throttle arm (112″ diameter). Note that the shoulder spacer goes on the inside and the anti-rotation spacer goes on the outside of the throttle arm. Attach to the front carb using the 3/16″ hole just below the large hole in the throttle arm. ADJUSTMENT – NOTE: If carburetors are full of fuel, place rags in the carb throats to absorb the fuel discharged when working the throttle linkage. This will prevent flooding and possible damage to the piston rings upon start-up. Be sure to remove the rags before starting engine. 1. Tighten the set screw and locknut on the rear bearing block, making sure that the bearing block is close to the end of the shaft from the front carburetor. 2. Push the throttle arms of both carbs to WOT (Wide Open Throttle), then adjust the aluminum collar to touch the rear brass bearing block. Securely tighten the set screw and locknut on the aluminum collar. 3. Let both throttle arms return to idle position, then adjust the front brass bearing block to almost touch the aluminum collar. Leave about .020″-.030″ clearance to allow for independent idle speed adjustment of each carburetor. Tighten all set screws, locknuts, and bolts at this time. 4. Check for smooth operation of linkage from idle to WOT and note that the rear carb will open about 20″ before starting to open the front carb. Both carbs should reach WOT at the same time. 5. IMPORTANT: Attach a return spring to both carburetors as shown in Figure 1. Use the return spring brackets supplied, bending as necessary for attachment to your engine. Generally the brackets can be attached to the intake manifold using the existing bolts. Use the longer or shorter spring on either the front or rear carburetor as required for your particular application. Check for smooth operation and positive return to idle. 6. Attach existing throttle linkage to rear carburetor using the 3/16″ hole below the large hole in the throttle arm. It may be necessary to shorten your existing linkage rod or cable, or to use an aftermarket cable mounting plate. BEFORE STARTING ENGINE, DOUBLE-CHECK FOR SMOOTH OPERATION OF LINKAGE FROM IDLE TO WIDE OPEN THROTTLE AND FOR POSITIVE RETURN TO IDLE. OPTIONAL 1:l INSTALLATION If 1:l linkage is desired, assemble and attach linkage kit as above, except that the attachment point to the front carburetor’s throttle arm will be the large 112″ hole using the other two 518″ O.D. x 3/16″ I.D. shoulder spacers (similar to the rear carburetor). Adjust the bearing blocks to eliminate all freeplay, so that all motion to the rear carburetor’s throttle arm is transmitted directly to the front carb’s throttle arm

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3406E Truck Engine Installation OR Removal Of The Speed/ Timing Sensor

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Filed Under (More Manuals) by admin on 22-06-2012

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1. Disconnect the speed/timing connector “P9/J9″ (2) . Inspect the connector for the following conditions. * Corrosion * Bent pins * Missing pins * Damaged sockets * Mismating * Broken wires 2. Remove the Speed/timing sensor (1) from the front gear cover. 3. Examine the plastic end of the sensor for signs of wear or contaminants such as metal filings. The plastic end of the speed/timing sensor should have no contaminants and should show no wear (greater than 0.051 mm (0.0020 inch) from the face) . 4. Use a screwdriver to carefully pry the plastic sensor end to the fully extended position (approximately 4.775 mm (0.1880 inch) beyond the metal housing of the sensor). 5. Gently push in on the plastic end of the sensor. The plastic end should be firm. The plastic end should resist movement in the retract direction. If there is no resistance replace the sensor 6. Remove the two bolts (3) and remove the cover (5) from the flywheel housing. This hole is used for engine turning. 7. Put one bolt (3) in the timing bolt location (4) . The timing bolt location is approximately 127 mm to 152 mm (5 inch to 6 inch) above the hole in the flywheel housing for engine turning. I 8. Use 9S-9082 Engine Turning Tool (6) and a 1/2 inch drive ratchet wrench to turn the engine flywheel in the direction of normal engine rotation. The normal engine rotation is in a counterclockwise direction when viewed from the flywheel end. Turn the engine flywheel until the timing bolt engages with the threaded hole in the flywheel. Note: Visually check the location of the tooth on the wheel on which the speed/timing sensor is to be positioned. The end of the sensor must be in alignment with a tooth on the wheel and not in alignment with the valley of the wheel. Note: The No. 1 piston must be at either top center of the compression stroke or at top center of the exhaust stroke. 9. Inspect the speed/timing sensor before installation. Use steps 3 through step 6 to inspect the sensor. 10. If the sensor end is not fully extended, use a screwdriver to carefully pry the plastic sensor end to the fully EXTENDED position approximately 4.775 mm (0.1880 inch) beyond the metal housing of the sensor.

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Acura MDX Torque Converter Shudder or Vibration Between 35 and 40 MPH Repair Manual

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Filed Under (Acura Manuals) by admin on 24-11-2011

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1. To confirm the client’s complaint, test-drive the vehicle on a smooth road, preferably with a slight incline. Set the cruise control between 35 and 40 mph, and monitor the engine rpm using the vehicle’s tachometer, or use the HDS to take a snapshot of the engine rpm. 2. If the engine speed fluctuates several hundred rpm while maintaining a constant vehicle speed, disconnect the EGR valve and retest the vehicle. •If the fluctuation is gone, refer to the EGR troubleshooting in the service manual. •If the engine rpm still fluctuates, and the transmission does not have any other symptoms (shifting problems, slipping, transmission DTCs) go to step 3. 3. Drain the transmission fluid, then strain it through a paint strainer. •If you find little or no contamination in the strainer, the ATF is OK, even if it smells burnt, is discolored, and/or the magnetic drain plug has small chips, flakes, or metal fuzz on it. Go to REPAIR PROCEDURE A . •If you find large amounts of contamination (pieces of metal or friction material) in the strainer, go to REPAIR PROCEDURE B . REPAIR PROCEDURE A 1. Remove the torque converter: •Refer to page 14-203 of the 2003-04 MDX Service Manual , or •Online, enter keyword A/T REM , and select A/T Removal from the list. 2. Install the torque converter: •Refer to page 14-215 of the 2003-04 MDX Service Manual , or •Online, enter keyword A/T INSTALL , and select A/T Installation from the list. 3. Update the PGM-FI software using HDS version 1.018.016 or later (see SOFTWARE INFORMATION ). Refer to service bulletin 01-026, Updating the ECM/PCM . 4. Do the idle learn procedure: •Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are off. •Start the engine, and let it run until it reaches its normal operating temperature (cooling fan cycles twice). •Let the engine idle with the throttle fully closed for 10 minutes. REPAIR PROCEDURE B Follow the IN-WARRANTY EXCHANGE steps in service bulletin 90-009, Automatic Transmission In- Warranty Exchange Program , to order a remanufactured A/T, replace the failed A/T, and return the failed A/T core. 1. Remove the transmission: •Refer to page 14-203 of the 2003-04 MDX Service Manual , or •Online, enter keyword A/T REM , and select A/T Removal from the list. 2. Clean the transmission cooler. Refer to service bulletin 89-015, ATF Cooler Cleaner . 3. Install a remanufactured transmission: •Refer to page 14-215 of the 2003-04 MDX Service Manual , or •Online, enter keyword A/T INSTALL , and select A/T Installation from the list. 4. Update the PGM-FI software using HDS version 1.018.016 or later (see SOFTWARE INFORMATION ). Refer to service bulletin 01-026, Updating the ECM/PCM . 5. Do the idle learn procedure: •Make sure all electrical items (A/C, audio unit, defogger, lights, etc.) are turned off. •Start the engine and let it run until it reaches its normal operating temperature (cooling fan cycles twice). •Let the engine idle with the throttle fully closed for 10 minutes

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1995-1997 FORD EXPLORER TRANSFER CASE BINDING OR SHUDDER DIAGNOSTICS VEHICLES WITH 4.0L ENGINE SERVICE TIP

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Filed Under (Ford Manuals) by admin on 20-01-2012

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TRANSFER CASE BINDING OR SHUDDER DIAGNOSTICS VEHICLES WITH 4.0L ENGINE SERVICE TIP ISSUE to the Data Link Connector (DLC) underneath The diagnostic procedure for binding or shudder the steering wheel. Monitor for any Diagnostic from transfer case in slow, tight turns while in 4 Trouble Codes (DTCs) set by the transfer case Auto mode may be inaccurate for some vehicles. that could indicate incorrect speed sensor function. Codes could include, but are not ACTION limited to: Diagnose transfer case binding or shudder concerns using the following Diagnostic Procedure. •P1836 – Front propshaft sensor circuit failure •P1837 – Rear propshaft sensor circuit failure DIAGNOSTIC PROCEDURE •P1874 – Hall effect sensor power short circuit to battery 1997 EXPLORER •P1875 – Hall effect sensor power circuit 1. Test drive the vehicle in 4 Auto, 4 High and 4 failure Low. Evaluate the vehicle in each of these NOTE modes. The vehicle should bind in turns in both ADDITIONAL CODES COULD BE SET AS WELL. 4 High and 4 Low, but not in 4 Auto. The 4 PLEASE REFER TO THE APPROPRIATE YEAR High mode is intended for severe winter EXPLORER SERVICE MANUAL FOR COMPLETE weather or off-road driving only. It is not LISTING AND EXPLANATION. intended for use on dry or merely wet pavement. 3. If any of the DTCs in the above Step 2 are set, remove the corresponding speed sensor and 2. Verify the instrument panel has the proper 4X4 replace accordingly. Drive the vehicle to verify if selection label (Figure 1). Proceed to 1995-97 the shudder/binding has been eliminated. Send Explorer heading, Step 1. replaced speed sensor to the Ford Warranty 1995-97 EXPLORER Parts Return Center, Canton, MI. NOTE 4. Using NGS Tester, monitor the Parameter 4 AUTO IS THE FAR LEFT SWITCH POSITION Identification Display (PID) on the transfer case ON 1997 MODELS AND IS THE MIDDLE clutch duty cycle. If the 4 Auto mode reads POSITION ON 1996 MODELS. something higher than one (1), verify speed sensors have not set any Generic Electronic 1. If during test driving, the vehicle shudders or Module (GEM) DTCs and follow the speed binds in 4 Auto during slow forward or reverse sensor diagnostic procedure in the above Step parking lot maneuvers, proceed to Step 2. 2. Verify the following while checking PID: Mode Duty Cycle Indicator 4 Auto 0 or 1 4 High 13 4 Low 38 at 5 MPH 5. If the speed sensor circuits are functional, inspect for water contamination in the transfer case oil

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