Toyota RAV4 (XA40) 2013-2018 Service Manual: Precaution

Toyota RAV4 (XA40) 2013-2018 Service Manual / U140f automatic transaxle / Automatic transaxle system / Precaution

Notice:

Perform the reset memory procedures (a/t initialization) when replacing the automatic transaxle assembly, engine assembly or ecm (see page ax-18).

Hint:

Reset memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.

Caution:

When using compressed air, always aim away from yourself to prevent automatic transmission fluid (atf) or kerosene from spraying on your face.

Notice:

The automatic transaxle is composed of precisionmade parts, necessitating careful inspection before reassembly because even a small nick could cause fluid leakage or affect performance.
The procedures are organized so that you work on only one component group at a time. This will help avoid confusion with similar-looking parts of different sub-assemblies being on your workbench at the same time.
The component groups are inspected and repaired from the converter housing side.
Whenever possible, complete the inspection, repair and reassembly before proceeding to the next component group. If a defect is found in a certain component group during reassembly, inspect and repair this group immediately. If a component group cannot be assembled because parts are being ordered, be sure to keep all parts of the group in a separate container while proceeding with disassembly, inspection, repair and reassembly of other component groups.
Use of toyota genuine atf ws is recommended.
All disassembled parts should be washed clean, and compressed air should be blown through any fluid passages and holes.
Dry all parts with compressed air. Never use cloth.
The recommended atf or kerosene should be used for cleaning.
After cleaning, the parts should be arranged in the order they were removed for efficient inspection, repairs, and reassembly.
When disassembling a valve body, be sure to match each valve with its corresponding spring.
New discs for the brakes and clutches that will be used for replacement must be soaked in atf for at least 15 minutes before reassembly.
All oil seal rings, clutch discs, clutch plates, rotating parts, and sliding surfaces should be coated with atf prior to reassembly.
All old gaskets and rubber o-rings must be replaced.
Do not apply adhesive cement to gaskets and similar parts.
Make sure that the ends of the snap rings are not aligned with any cutouts. Also make sure that snap rings are correctly installed into the grooves.
If a worn bushing is to be replaced, the sub-assembly containing the bushing must also be replaced.
Check the thrust bearings and races for wear or damage. Replace them if necessary.
Use petroleum jelly to keep parts in place.
When working with fipg material, perform the following: using a razor blade and gasket scraper, remove all old fipg material from the gasket surface.

Clean all components thoroughly to remove all foreign matter.

Clean both sealing surfaces with a non-residue solvent.

Apply fipg material in a continuous line approximately 1 mm (0.04 In.) In diameter on the sealing surface.

Reassemble parts within 10 minutes of applying fipg material. Failing to do so will require the fipg material to be removed and reapplied.

Definition of terms

Term	Definition
Monitor description	Description of what the ecm monitors and how it detects malfunctions (monitoring purpose and its details).
Related dtcs	Diagnostic code.
Typical enabling condition	Preconditions that allow 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. While another sensor is being monitored, the next sensor or component will not be monitored.
Required sensor/components	The 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 per 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 setting a dtc. This timing begins after the "typical enabling conditions" are met.
Malfunction thresholds	Beyond 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 the 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. Use these ranges as a reference. They cannot be used to judge if a sensor or solenoid is defective or not.

Parts location

System diagram The configuration of the electronic control system in the u140f automatic transaxle is as shown in the following chart. System description System descript ...

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