丰田Toyota RAV4 Repair Manual/U241E Automatic Transaxle.pdf
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1、U241E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX3 AX DEFINITION OF TERMS TermDefinition Monitor descriptionDescription of what the ECM monitors and how it detects malfunctions (monitoring purpose and its details). Related DTCsDiagnostic code. Typical enabling condition Preconditions that allo
2、w the ECM to detect malfunctions. With all preconditions satisfied, the ECM sets the DTC when the monitored value(s) exceeds the malfunction threshold(s). Sequence of operation The priority order that is applied to monitoring, if multiple sensors and components are used to detect the malfunction. Wh
3、ile another sensor is being monitored, the next sensor or component will not be monitored. Required sensor/ComponentsThe sensors and components that are used by the ECM to detect malfunctions. Frequency of operation The number of times that the ECM checks for malfunctions per driving cycle. “Once pe
4、r driving cycle“ means that the ECM detects malfunction only 1 time during a single driving cycle. “Continuous“ means that the ECM detects a malfunction every time the enabling condition is met. Duration The minimum time that the ECM must sense a continuous deviation in the monitored value(s) before
5、 setting a DTC. This timing begins after the “typical enabling conditions“ are met. Malfunction thresholdsBeyond this value, the ECM will conclude that there is a malfunction and set a DTC. MIL operation MIL illumination timing after a defect is detected. “Immediate“ means that the ECM illuminates t
6、he MIL the instant the ECM determines that there is a malfunction. “2 driving cycle“ means that the ECM illuminates the MIL if the same malfunction is detected again in the 2nd driving cycle. Component operating range Normal operation range of sensors and solenoids under normal driving conditions. U
7、se these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not. AX4 U241E AUTOMATIC TRANSAXLE AUTOMATIC TRANSAXLE SYSTEM AX PARTS LOCATION - MIL DLC3 STOP LIGHT SWITCH TRANSMISSION CONTROL SWITCH COMBINATION METER ASSEMBLY C127571E03 U241E AUTOMATIC TRANSAXL
8、E AUTOMATIC TRANSAXLE SYSTEM AX5 AX SHIFT SOLENOID VALVE S4 SHIFT SOLENOID VALVE DSL SHIFT SOLENOID VALVE SLT SHIFT SOLENOID VALVE SL2 SHIFT SOLENOID VALVE SL1 ECM SPEED SENSOR NC PARK / NEUTRAL POSITION SWITCH SPEED SENSOR NT TRANSMISSION WIRE (ATF TEMPERATURE SENSOR) C127581E03 AX136 U241E AUTOMAT
9、IC TRANSAXLE FLOOR SHIFT ASSEMBLY AX REMOVAL 1.DISCONNECT CABLE FROM NEGATIVE BATTERY TERMINAL CAUTION: Wait at least 90 seconds after disconnecting the cable from the negative (-) battery terminal to prevent airbag and seat belt pretensioner activation. 2.REMOVE SHIFT LEVER KNOB SUB-ASSEMBLY 3.REMO
10、VE REAR CONSOLE BOX SUB-ASSEMBLY (a)Remove the console box (see page IP-20). 4.DISCONNECT TRANSMISSION CONTROL CABLE ASSEMBLY (a)Disconnect the control cable from the shift lever. (b)Turn the nut and disconnect the control cable from the shift lever retainer. 5.REMOVE FLOOR SHIFT ASSEMBLY (a)Remove
11、the 4 bolts and floor shift. C130920 Nut C127813E01 C127815 U241E AUTOMATIC TRANSAXLE FLOOR SHIFT ASSEMBLY AX137 AX (b)Disconnect the 2 connectors and detach the clamp. DISASSEMBLY 1.REMOVE LOWER POSITION INDICATOR HOUSING (a)Detach the 4 claws and remove the housing. (b)Remove the position indicato
12、r slide cover with slide No. 2 cover. 2.REMOVE POSITION INDICATOR LIGHT HOUSING (a)Detach the 2 claws and remove the indicator light housing from the floor shift position indicator housing. 3.REMOVE INDICATOR LIGHT WIRE SUB-ASSEMBLY C127814 C127818 C127816 AX138 U241E AUTOMATIC TRANSAXLE FLOOR SHIFT
13、 ASSEMBLY AX 4.REMOVE SHIFT LOCK RELEASE BUTTON (a)Detach the 2 claws and remove the button and spring from the position indicator light housing. C127817 AX248 U241E AUTOMATIC TRANSAXLE UNDERDRIVE CLUTCH AX INSPECTION 1.INSPECT UNDERDRIVE PACK CLEARANCE (a)Install the underdrive clutch to the transa
14、xle case. NOTICE: Be careful not to damage the oil seal rings. (b)Install a dial indicator as shown in the illustration. (c)Measure the underdrive clutch pack clearance while applying and releasing compressed air (392 kPa, 4.0 kgf/cm2, 57 psi). Standard pack clearance: 1.51 to 1.90 mm (0.0594 to 0.0
15、748 in.) If the pack clearance is not as specified, inspect the discs, plates and flange. 2.INSPECT NO. 1 UNDERDRIVE CLUTCH DISC (a)Check to see if the sliding surface of the disc, plate and flange are worn or burnt. If necessary, replace them. HINT: If the lining of the disc is peeling off or disco
16、lored, or even if a part of the printed mark is defaced, replace all discs. Before assembling new discs, soak them in ATF for at least 15 minutes. 3.INSPECT UNDERDRIVE CLUTCH RETURN SPRING SUB-ASSEMBLY (a)Using a vernier caliper, measure the free length of the spring together with the spring seat. S
17、tandard free length: 17.14 mm (0.6748 in.) D008123E01 D008124E01 D004077E01 D009214E01 U241E AUTOMATIC TRANSAXLE UNDERDRIVE CLUTCH AX249 AX 4.INSPECT UNDERDRIVE CLUTCH DRUM SUB- ASSEMBLY (a)Using a caliper gauge, measure the inside diameter of the underdrive clutch drum bush. Standard drum bush: 32.
18、56 to 32.58 mm (1.2818 to 1.2826 in.) Maximum drum bush: 32.63 mm (1.2846 in.) If the inside diameter is greater than the maximum, replace the underdrive clutch drum sub-assembly. REASSEMBLY 1.INSTALL UNDERDRIVE CLUTCH DRUM O-RING (a)Coat a new O-ring with ATF and install it to the underdrive clutch
19、 drum. 2.INSTALL UNDERDRIVE CLUTCH PISTON SET (a)Coat the underdrive clutch piston with ATF, and install it to the underdrive clutch piston drum. NOTICE: Be careful not to damage the O-ring. (b)Install the piston return spring and clutch balancer to the underdrive clutch drum. NOTICE: Be careful not
20、 to damage the lip seal of the clutch balancer. (c)Place SST on the clutch balancer and compress the piston return spring with a press. SST09350-32014 (09351-32070) (d)Using a snap ring expander, install the snap ring to underdrive clutch drum. NOTICE: Be sure the end gap of the snap ring is not ali
21、gned with the clutch balancers claw. Stop the press when the spring sheet is lowered to the place 1 to 2 mm (0.039 to 0.078 in.) from the sap ring groove. D008129E02 D004078E01 D003860E01 D003704E01 SST D003703E02 AX250 U241E AUTOMATIC TRANSAXLE UNDERDRIVE CLUTCH AX This prevents the spring sheet fr
22、om being deformed. Do not expand the snap ring excessively. 3.INSTALL NO. 1 UNDERDRIVE CLUTCH DISC (a)Install the 3 plates, 3 discs and flange. Install in order: P - D - P - D - P - D - F HINT: P = Plate D = Disc F = Flange (b)Using a screwdriver, install the snap ring. (c)Check that the end gap of
23、the snap ring is not aligned with one of the cutouts. 4.INSPECT UNDERDRIVE PACK CLEARANCE (a)Install the underdrive clutch to the transaxle case. NOTICE: Be careful not to damage the oil seal rings. (b)Set a dial indicator as shown in the illustration. (c)Measure the underdrive clutch piston stroke
24、while applying and releasing compressed air (392 kPa, 4.0 kgf/cm2, 57 psi). Standard pack clearance: 1.51 to 1.90 mm (0.0594 to 0.0748 in.) If the pack clearance is less than the minimum, parts may have been assembled incorrectly, so check and reassemble again. If the park clearance is not as specif
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