Unformatted text preview: AT1 A340E AUTOMATIC TRANSMISSION AT2
AUTOMATIC TRANSMISSION OPERATION
FUNCTION OF COMPONENTS *1 Downshift only in the 2 position and 3rd gearno upshift. *2 Downshift only in the L position and 2nd gearno upshift. AT3
AUTOMATIC TRANSMISSION OPERATION V03468 AT4
AUTOMATIC TRANSMISSION OPERATION AT5
AUTOMATIC TRANSMISSION OPERATION AT6
AUTOMATIC TRANSMISSION OPERATION
AX01A0M HYDRAULIC CONTROL SYSTEM
The hydraulic control system is composed of an oil pump, valve body, solenoid valves, accumulators, clutches and brakes, as well as the fluid passages which connect all of these components. Based on the hydraulic pressure created by the oil pump, the hydraulic control system governs the hydraulic pressure acting on the torque converter clutch, clutches and brakes in accordance with the vehicle driving conditions. The No.1 and No.2 solenoid valves are turned on and off by signals from the ECM to operate the shift valves, and change the gear shift position. The No.3 solenoid valve is operated by signals from the ECM to engage or disengage the lockup clutch of the torque converter clutch. The No.4 solenoid valve is operated by signals from the ECM to control the engagement speed and reduce gear shift shock. V04973 AT7
AUTOMATIC TRANSMISSION OPERATION
AT0KY06 ELECTRONIC CONTROL SYSTEM
General The electronic control system for the A340E automatic transmission provides extremely precise control of the gear shift timing and lockup timing in response to driving conditions as sensed by various sensors located throughout the vehicle and in response to the engine's running condition. At the same time, the ECM control reduces vehicle squat when the vehicle starts out and gear shift shock. The electronic control system is also equipped with a self diagnosis system which diagnoses malfunctions of electronically controlled components and warns the driver, and a failsafe system which makes it possible for the vehicle to continue functioning when a malfunction occurs. Construction The electronic control system can be broadly divided into three groups; the sensors, ECM and actuators. V05702 AT8
AUTOMATIC TRANSMISSION OPERATION SYSTEM DIAGRAM No. 7 6 5 4 3 2 1 Cruise Control ECU O/D Main Switch RPM Sensor Stop Light Switch Throttle Position Sensor Park/Neutral Position Switch Pattern Select Switch Components This ECU prevents the transmission from shifting into O/D and prohibits lockup control when the vehicle's speed drops below the cruise control set speed parameter. Prevents upshift to the O/D gear if the O/D main switch is off. Detects the throttle valve opening angle. Detects if the brake pedal is depressed. Detects the shift lever position. Detects the engine speed. Function Selects the Power mode or the Normal mode for shift and lockup timing. ARRANGEMENT OF COMPONENTS
AUTOMATIC TRANSMISSION OPERATION AT9 AT10
AUTOMATIC TRANSMISSION OPERATION 8 No.1 and No.2 Vehicle Speed Sensor Detects the vehicle speed. Ordinarily, transmission control uses signals from the No.2 vehicle speed sensor, and the No.1 vehicle speed sensor is used as a backup. 9 O/D Direct Clutch Speed Sensor Engine Coolant Temp. Sensor ECM Detects the input shaft speed from 1st gear to 3rd gear. Detects the engine coolant temperature. Control the engine and transmission actuators based on signals from each sensor. 10 11 12 No.1 and No.2 Solenoid Valves Control the hydraulic pressure applied to each shift valve, and control the gear position and timing. Controls the hydraulic pressure applied to the back chamber of the accumulator and smooths the engagement of clutches and brakes during shifting. Controls the hydraulic pressure applied to the lockup clutch and controls lockup timing. 13 No.4 Solenoid valve (For accumulator back pressure modulation) No.3 Solenoid valve (For lockup control) 14 15 O/D OFF Indicator Light Blinks and warns the driver, while the O/D main switch is pushed in, when the electronic control circuit is malfunctioning. AT11
AUTOMATIC TRANSMISSION PRECAUTION, PREPARATION PRECAUTION
AT0QY01 When working with FIPG material, you must observe the following. Using a razor blade and gasket scraper, remove all the old packing material from the gasket surfaces. Thoroughly clean all components to remove all the loose material. Clean both sealing surfaces with a nonresidue solvent. Apply the FIPG in approx. 1 mm (0.04 in.) wide bead along the sealing surface. Parts must be assembled within 10 minutes of application. Otherwise, the FIPG material must be removed and reapplied. If the vehicle is equipped with a mobile communication system, refer to the precaution in the IN section. PREPARATION
SST (SPECIAL SERVICE TOOLS)
AX01C0D SSM (Special Service Materials) LUBRICANT EQUIPMENT RECOMMENDED TOOLS
Automatic transmission fluid Torque wrench Dial indicator or dial indicator with magnetic base Vernier calipers Straight edge Dry fill Drain and refill Item
AUTOMATIC TRANSMISSION 7.5 liters (7.9 US qts, 6.9 Imp. qts) 1.9 liters (2.0 US qts, 1.7 Imp. qts) Capacity ATF TYPE TII or equivalent Measure drive plate runout. Check torque converter clutch installation. Check torque converter clutch installation. Classification
AX01E0G AX01Q0F AX01F0C 0882600090 Seal Packing 1281, THREE BOND 1281 or equivalent (FIPG) PREPARATION Oil pan AX01D0J AT13
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR ONVEHICLE REPAIR
VALVE BODY REMOVAL
AT0UT01 1. 2. Installation is in the reverse of removal. INSTALLATION HINT: After installation, fill ATF and fluid level. (See page AT37) DRAIN ATF REMOVE FRONT EXHAUST PIPE (See page AT21) 3. REMOVE OIL PAN (a) Remove the 19 bolts.
Torque: 7.4 Nm (75 kgfcm, 85 in.lbf) (b) Install the blade of SST between the transmission case and oil pan, cut off applied sealer. SST 0903200100
REMOVAL NOTICE: Be careful not to damage the oil pan flange. 4. EXAMINE PARTICLES IN PAN Remove the magnets and use them to collect steel particles. Carefully look at the foreign matter and particles in the pan and on the magnets to anticipate the type of wear you will find in the transmission: Steel (magnetic) bearing, gear and clutch plate wear Brass (nonmagnetic) bushing wear INSTALLATION HINT: Install the 3 magnets in the indentations of the oil pan, as shown in the illustration. Remove any FIPG material and be careful not to drop oil on the contacting surfaces of the transmission case and oil pan. Apply FIPG to the oil pan, as shown in the illustration.
FIPG: Part No. 0882600090, THREE BOND 1281 or equivalent 5. REMOVAL OIL STRAINER Remove the 3 bolts holding the oil strainer to the valve body.
Torque: 10 Nm (100 kgfcm, 7 ftlbf) AT14
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR 6. REMOVE SOLENOID WIRING (a) Remove the 2 bolts and the clamp. (b) Disconnect the 4 connectors from the solenoid valves. 7. REMOVE 4 SOLENOID VALVES (a) Remove the No.1 and No.2 solenoid valves. (b) Remove the Oring from the No.1 and No.2 solenoid valves. INSTALLATION HINT: Replace the Orings with new ones. (c) Remove the lock plate and No.3 and No.4 solenoid valves. 8. REMOVE THROTTLE CABLE Disconnect the throttle cable from the cam. 9. REMOVE VALVE BODY (a) Remove the 12 bolts. (b) Remove the valve body.
Torque: 10 Nm (100 kgfcm, 7 ftlbf) INSTALLATION HINT: Align the groove of the manual valve to the pin of the lever. AT15
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR REMOVAL NOTICE: Do not drop the check ball body and spring. 10. INSPECT VALVE BODY Refer to A340E and A341E Automatic Transmission Repair Manual. (Pub. No. RM402U) AT0UU01 THROTTLE CABLE REMOVAL
Installation is in the reverse order of removal. INSTALLATION HINT: After installation, adjust the throttle cable. (See page AT38) 1. DISCONNECT THROTTLE CABLE (a) Disconnect the cable housing from the bracket. (b) Disconnect the cable from the throttle linkage. (c) Disconnect the cable from the torque converter clutch housing. 2. REMOVE VALVE BODY (See page AT13) 3. PULL THROTTLE CABLE OUT OF TRANSMISSION CASE (a) Remove the retaining bolt and pull out the throttle cable. (b) Remove the Oring from the cable.
Torque: 5 Nm (55 kgfcm, 48 in.lbf) INSTALLATION HINT: Coat a new Oring with ATF and install it to the cable. INSTALLATION HINT: New cables do not have a cable stopper staked. Pull in the slack of the inner cable. Stake the stopper, as shown, 01 mm (00.04 in.) in width. AT16
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR AT0QZ03 NO.1 VEHICLE SPEED SENSOR ASSEMBLY REPLACEMENT
1. 2. (a) (b) (c) 3. (a) (b) (c) DISCONNECT NO.1 VEHICLE SPEED SENSOR CONNECTOR REMOVE NO.1 VEHICLE SPEED SENSOR ASSEMBLY Remove the bolt and No.1 vehicle speed sensor assembly. Remove the speedometer driven gear from the No.1 vehicle speed sensor. Remove the Oring from the No.1 vehicle speed sensor. INSTALL NO.1 VEHICLE SPEED SENSOR ASSEMBLY Coat a new Oring with ATF and install it to the No. 1 vehicle speed sensor. Install the speedometer driven gear to the No.1 vehicle speed sensor. Install the No.1 vehicle speed sensor to the extension housing and torque the bolt.
Torque: 16 Nm (160 kgfcm, 12 ftlbf) 4. CONNECT NO.1 VEHICLE SPEED SENSOR CONNECTOR AT0L109 NO.2 VEHICLE SPEED SENSOR REPLACEMENT
1. 2. (a) (b) 3. (a) (b) DISCONNECT NO.2 VEHICLE SPEED SENSOR CONNECTOR REMOVE NO.2 VEHICLE SPEED SENSOR Remove the bolt and No.2 vehicle speed sensor. Remove the Oring from it. INSTALL NO.2 VEHICLE SPEED SENSOR Coat a new Oring with ATF and install it to the No. 2 vehicle speed sensor. Install the No.2 vehicle speed sensor to the extension housing and torque the bolt.
Torque: 5.4 Nm (55 kgfcm, 48 in.lbf) 4. CONNECT NO.2 CONNECTOR VEHICLE SPEED SENSOR AT17
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR AT0L204 O/D DIRECT CLUTCH SPEED SENSOR REPLACEMENT
1. DISCONNECT O/D DIRECT CLUTCH SPEED SENSOR CONNECTOR 2. (a) (b) 3. (a) REMOVE O/D DIRECT CLUTCH SPEED SENSOR Remove the bolt and O/D direct clutch speed sensor. Remove the Oring from it. INSTALL O/D DIRECT CLUTCH SPEED SENSOR Coat a new Oring with ATF and install it to the O/D direct clutch speed sensor. (b) Install the O/D direct clutch speed sensor to the transmission case and torque the bolt.
Torque: 5.4 Nm (55 kgfcm, 48 in.lbf) 4. CONNECT O/D DIRECT CLUTCH SPEED SENSOR CONNECTOR AT0L309 PARK/NEUTRAL POSITION SWITCH REPLACEMENT
1. REMOVE FRONT EXHAUST PIPE (See page AT21) 2. DISCONNECT PARK/NEUTRAL POSITION SWITCH CONNECTOR 3. REMOVE PARK/NEUTRAL POSITION SWITCH (a) Remove the control shaft lever. (b) Pry off the lock washer and remove the nut. (c) Remove the bolt and pull out the park/neutral position switch. 4. INSTALL AND ADJUST PARK/NEUTRAL POSITION SWITCH 5. CONNECT PARK / NEUTRAL POSITION SWITCH CONNECTOR 6. INSTALL FRONT EXHAUST PIPE (See pages AT21) AT18
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR
AT0UY01 EXTENSION HOUSING REAR OIL SEAL REPLACEMENT
1. 2. 3. DRAIN ATF REMOVE FRONT EXHAUST PIPE AND HEAT INSULATOR (See page AT21) REMOVE PROPELLER SHAFT (See page PR5) 4. REMOVE TRANSMISSION OUTPUT FLANGE (a) Using a hammer and chisel, loosen the staked part of the nut. HINT: Shift the shift lever to the P position. (b) Remove the nut. (c) Tap the output flange with a plastic hammer to remove it and 2 washers. (d) Remove the oil seal from the output flange. 5. REMOVE EXTENSION HOUSING REAR OIL SEAL Using SST, remove the oil seal. SST 0930800010 AT19
AUTOMATIC TRANSMISSION ONVEHICLE REPAIR 6. INSTALL EXTENSION HOUSING REAR OIL SEAL (a) Coat the lip of oil seal with MP grease. (b) Using SST, drive in a new oil seal with the lip facing downward. SST 0930937010
Oil seal depth from flat end: 00.3 mm (00.012 in.) 7. INSTALL TRANSMISSION OUTPUT FLANGE (a) Using SST, drive in a new oil seal. SST 0951736010 (b) Install the output flange and 2 washers. (c) Install and torque a new nut.
Torque: 123 Nm (1,250 kgfcm, 90 ftlbf) HINT: Shift the shift lever to the P position. (d) Using a hammer and chisel, stake the nut. 8. INSTALL PROPELLER SHAFT (See page PR8) 9. INSTALL FRONT EXHAUST PIPE AND HEAT INSULATOR (See page AT21) 10. FILL WITH ATF 11. CHECK FLUID LEVEL (See page AT37) AT20
AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION ASSEMBLY REMOVAL AND INSTALLATION
AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION AT0UW01 TRANSMISSION REMOVAL
Installation is in the reverse order of removal. INSTALLATION HINT: After installation, check and inspect items as follows. Shift control rod. (See page AT38) Fluid level. (See page AT37) 1. REMOVE LEVEL GAUGE 2. REMOVE FILLER PIPE 3. DISCONNECT THROTTLE CABLE 4. DISCONNECT OXYGEN SENSOR (a) Disconnect the oxygen sensor grommet from the floor. (b) Disconnect the oxygen sensor.
Torque: 44 Nm (450 kgfcm, 33 ftlbf) INSTALLATION NOTICE: After installing the oxygen sensor, check that the wire is not twisted. 5. REMOVE LEFT AND RIGHT TAIL PIPES (a) Remove the nuts and disconnect the left and right tail pipes from the center exhaust pipe.
Torque: 19 Nm (195 kgfcm, 14 ftlbf) (b) Remove the left and right tail pipe from the brackets. 6. REMOVE FRONT AND CENTER EXHAUST PIPE (a) Remove the 2 nuts and bolts, disconnect the front exhaust pipe from the No.2 exhaust pipe
Torque: 43 Nm (440 kgfcm, 32 ftlbf) (b) Remove the 2 bolts and exhaust pipe support bracket.
Torque: 37 Nm (380 kgfcm, 27 ftlbf) (c) Remove the center exhaust pipe brackets and front and center exhaust pipe
Torque: 13 Nm (130 kgfcm, 9 ftlbf) 7. 8. REMOVE HEAT INSULATOR
Torque: 5.4 Nm (55 kgfcm, 48 in.lbf) REMOVE REAR CENTER FLOOR CROSSMEMBER BRACE
Torque: 13 Nm (130 kgfcm, 9 ftlbf) AT22
AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION 9. DISCONNECT SHIFT CONTROL ROD FROM SHIFT LEVER
Torque: 13 Nm (130 kgfcm, 9 ftlbf) 10. REMOVE PROPELLER SHAFT (See page PR5) 11. DISCONNECT FOLLOWING CONNECTORS: O/D direct clutch speed sensor No.1 vehicle speed sensor No.2 vehicle speed sensor Solenoid wire Park/neutral position switch 12. DISCONNECT CONNECTOR AND CABLE FROM STARTER 13. REMOVE OIL COOLER PIPES (a) Disconnect the 2 oil cooler union nuts.
Torque: 44 Nm (450 kgfcm, 32 ftlbf) (b) Disconnect the oil cooler hoses from oil cooler pipes. (c) Remove the front oil cooler pipe bracket.
Torque: 5.5 Nm (55 kgfcm, 49 in.lbf) (d) Remove the center and rear oil cooler pipe brackets.
Torque: A Bolt: 10 Nm (100 kgfcm, 7 ftlbf) B Bolt: 5.5 Nm (56 kgfcm, 49 in.lbf) (e) Remove the 2 oil cooler pipes. 14. REMOVE TORQUE CONVERTER MOUNTING BOLTS (a) Remove the converter plate. (b) Turn the crankshaft to gain access to each bolt. Remove the 6 bolts.
Torque: 41 Nm (420 kgfcm, 30 ftlbf) AT23
AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION 15. SET TRANSMISSION JACK INSTALLATION HINT: Make sure the engine and transmission are aligned precisely. Adjust the angle of the engine and transmission so that the engine installation surface and transmission surface parallel. 16. SUPPORT ENGINE
NOTICE: Use a wooden block so not to damage the engine oil pan. 17. REMOVE TRANSMISSION REAR SUPPORT 18. LOOSEN NO.2 EXHAUST PIPE SET NUTS Loosen the 4 No.2 exhaust pipe set nuts until the No. 2 exhaust pipe can moves freely.
Torque: 25 Nm (260 kgfcm, 19 ftlbf) 19. REMOVE WIRE HARNESS CLAMPS Lower the transmission and remove the 3 wire harness clamps from the retainer. 20. REMOVE STARTER AND TRANSMISSION SET BOLTS
Torque: Starter: 37 Nm (380 kgfcm, 27 ftlbf) Transmission: 72 Nm (730 kgfcm, 53 ftlbf) 21. REMOVE TRANSMISSION FROM ENGINE AT0UX01 INSPECT TORQUE CONVERTER CLUTCH INSTALLATION
Using feeler gauge and a straight edge, measure between the installed surface of the transmission and the straight edge.
Clearance: Less than 0.1 mm (0.004 in.) AT24
AUTOMATIC TRANSMISSION ASSEMBLY REMOVAL AND INSTALLATION AT0UY01 TORQUE CONVERTER CLUTCH AND DRIVE PLATE INSPECTION
1. INSPECT ONEWAY CLUTCH (a) Install SST into the inner race of the oneway clutch. SST 0935033014 (0935132010) (b) Install SST so that it fits in the notch of the converter hub and outer race of the oneway clutch. SST 0935032014 (0935132020) (c) With the torque converter clutch standing on its side, the clutch should lock when turned counterclockwise, and rotate freely and smoothly clockwise. If necessary, clean the converter clutch and retest the clutch. Replace the converter clutch if the clutch still fails the test. 2. MEASURE DRIVE PLATE RUNOUT AND INSPECT RING GEAR Set up a dial indicator and measure the drive plate runout.
Maximum runout: 0.20 mm (0.0079 in.) If the runout is not within specification, replace the drive plate.
Torque: 83 Nm (850 kgfcm, 61 ftlbf) 3. MEASURE TORQUE CONVERTER CLUTCH SLEEVE RUNOUT Temporarily mount the torque converter clutch to the drive plate. Set up a dial indicator.
Maximum runout: 0.30 mm (0.0118 in.) If the runout is not within specification, try to correct by reorienting the installation of the converter. HINT: Mark the position of the converter clutch to ensure correct installation. AT25
AUTOMATIC TRANSMISSION SHIFT LOCK SYSTEM
AT01L0C SHIFT LOCK SYSTEM
COMPONENT PARTS LOCATION AT01M08 WIRING DIAGRAM AT26
AUTOMATIC TRANSMISSION SHIFT LOCK SYSTEM AT0R202 ELECTRIC CONTROL COMPONENTS INSPECTION
1. INSPECT SHIFT LOCK CONTROL ECU Using a voltmeter, measure the voltage at each terminal. HINT: Do not disconnect the computer connector. Terminal Measuring Condition Voltage (V) 1014 1014 1014 ACC E IG E Ignition switch ACC position Ignition switch ON position Depressing brake pedal B/K E KLS+ E Ignition switch ACC position and P position Ignition switch ACC position and except P position (Approxafter one second) Ignition switch ON position and P range Depress brake pedal (Approxafter 20 seconds) Except P position 0 1014 69 SLS+ SLS 0 8.513.5 5.59.5 0 0 913.5 P1 P P2 P Ignition switch ON, P position and depress brake pedal Shift except P position under conditions above Ignition switch ACC position, P position Shift except P position under conditions above 913.5 0 2. INSPECT SHAFT LOCK SOLENOID (a) Disconnect the solenoid connector. (b) Using an ohmmeter, measure the resistance between terminals.
Standard resistance: 2127 W (c) Apply battery positive voltage between terminals. Check that operation noise can be heard from the solenoid. AT27
AUTOMATIC TRANSMISSION SHIFT LOCK SYSTEM 3. INSPECT KEY INTERLOCK SOLENOID (a) Disconnect the solenoid connector. (b) Using an ohmmeter, measure the resistance between terminals.
Standard resistance: 12.516.5 W (c) Apply battery voltage positive between terminals. Check that an operation noise can be heard from the solenoid. 4. INSPECT SHIFT LOCK CONTROL SWITCH Inspect that there is continuity between each terminal.
Shift position Tester condition to terminal number PP1 P P1 P P1 PP1 PP2 PP2 P P2 Specified value Continuity Continuity Continuity P position (Release osition button is not pushed) P position (Release osition button is pushed) R, N, D, 2, R N D 2 L position AT28
AUTOMATIC TRANSMISSION TROUBLESHOOTING TROUBLESHOOTING AT29
AUTOMATIC TRANSMISSION TROUBLESHOOTING
AT0UZ01 HOW TO PROCEED WITH TROUBLESHOOTING
Perform troubleshooting in accordance with the procedure on the following pages. P. AT30 P. AT31 AT32 P. AT34 P. IN23 P. AT31 AT32 P. AT37 P. AT50 P. AT33 P. AT40 P. AT49 P. AT56 P. AT58 P. AT60 P. AT62 AT94 AT30
AUTOMATIC TRANSMISSION TROUBLESHOOTING
AT09Q0S CUSTOMER PROBLEM ANALYSIS AT31
AUTOMATIC TRANSMISSION TROUBLESHOOTING AT09R0K DIAGNOSIS SYSTEM
The automatic transmission has builtin selfdiagnostic functions. If the malfunction occurs in the system, the ECM stores the diagnostic trouble code in memory and the O/D OFF (Overdrive OFF) indicator light blinks to inform the driver. The diagnostic trouble code stored in memory can be read out by the following procedure.
AT09S0L O/D OFF INDICATOR LIGHT INSPECTION
1. 2. Turn the ignition switch to ON. Check if the O/D OFF indicator light lights up when the O/D main switch is pushed out to OFF and goes off when the O/D main switch is pushed in to ON. HINT: If the O/D OFF indicator light does not light up or stay on all the time, carry out the check for "O/D OFF Indicator Light Circuit" on page AT88.
AT0AS0K DIAGNOSTIC TROUBLE CODE CHECK
1. 2. Turn the ignition switch ...
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