IGNITION SWITCH EXPRESSION
Tech Tips
The type of ignition switch used on this model differs depending on the specifications of the vehicle. The expressions listed in the table below are used in this section.
Expression | Ignition Switch (Position) | Engine Switch (Condition) |
---|---|---|
Ignition Switch off | LOCK | Off (Lock) |
Ignition Switch ACC | ACC | On (ACC) |
Ignition Switch ON | ON | On (IG) |
Engine Start | START | On (Start) |
PRECAUTION FOR DISCONNECTING CABLE FROM NEGATIVE BATTERY TERMINAL
Note
When disconnecting the cable from the negative (-) battery terminal, initialize the following system(s) after the cable is reconnected:
System | See Procedure |
---|---|
Lane departure alert system (w/ Steering Control) | |
Pre-collision system | |
Parking assist monitor system | |
Panoramic view monitor system | |
Power door lock control system | |
Air conditioning system (for Automatic Air Conditioning System) | |
Air conditioning system (for Manual Air Conditioning System) | |
Power back door system |
PROCEDURES NECESSARY WHEN ECU OR OTHER PARTS ARE REPLACED
Note
If automatic transaxle parts are replaced, perform the following as necessary referring to the table below:
Replaced Part | Transaxle Compensation Code | Reset Memory (Learned Values) | Road Test | |
Automatic transaxle assembly | Input | Reset | Necessary | |
Transmission valve body assembly | Initialize | Reset | Necessary | |
Solenoid (SL1, SL2, SL3, SL4, SL5 and/or SL6) valve | Initialize | Reset | Necessary | |
ECM (If possible, read the transaxle compensation code from the previous ECM) |
Possible to read transaxle compensation code | Input (Into the new ECM) | -*1 Reset*2 |
Necessary |
Impossible to read transaxle compensation code | Initialize | -*1 Reset*2 |
Necessary |
*1: When replacing with a new ECM
*2: When replacing with an ECM which was installed to another vehicle
Registration of the transaxle compensation code.
Initialization of the transaxle compensation code.
Road test.
Reset Memory (learned values).
Tech Tips
Reset Memory cannot be completed by only reconnecting the cable to the negative (-) battery terminal.
Perform Registration (VIN registration) when replacing the ECM.
HANDLING PRECAUTIONS
CAUTION:
When using compressed air, always aim away from yourself to prevent Automatic Transaxle Fluid (ATF) or kerosene from being sprayed on your face.
Note
The automatic transaxle is composed of precision-made parts. Careful inspection before reassembly is necessary 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 cleaned, and compressed air should be blown through any fluid passages and holes.
Dry all parts with compressed air. Never use a piece of 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, repair and reassembly.
New brake discs and clutch discs 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 or similar parts.
Make sure that the ends of snap rings are not aligned with any cutouts. 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 seal packing (FIPG), observe the following:
Using a razor blade and a gasket scraper, remove all of the old seal packing (FIPG) from the gasket surface.
Thoroughly clean all components to remove any seal packing (FIPG).
Clean both sealing surfaces with a non-residue solvent.
Parts must be reassembled within 10 minutes of application. Otherwise, the seal packing (FIPG) must be removed and reapplied.