LEXUS RX 300

1998 — 2003 of release

Repair and operation of the car



Lexus RX 300
+ Lexus RX-300 cars
+ Governing bodies and methods of operation
+ Settings and routine maintenance of the car
+ Engine
+ Cooling systems of the engine, heating, ventilation and air conditioning
+ A power supply system and production of the fulfilled gases
+ Systems of electric equipment of the engine
+ Automatic transmission and interaxal differential
+ Transmission line
+ Brake system
+ Suspension bracket and steering
+ Body
- Onboard electric equipment
   General information
   Diagnostics of malfunctions of onboard electric equipment - the general information
   Safety locks - the general information
   The relay - the general information and check of serviceability of functioning
   Screen wipers and windscreen washers
   Replacement of glow lamps
   Removal and installation of a casing of a steering column and understeering switches
   Check of serviceability of functioning of some auxiliary systems
   Removal and installation of the antenna
   Removal and installation of a combination of devices
   Adjustment of an inclination of headlights
   Removal and installation of components of the SRS system
   Removal and installation of components of window regulators and screen wipers
+ Schematic diagrams of electric connections


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Safety locks - the general information

The most part of safety locks and the relay is located on the considered cars in the assembly block located at the left under the dashboard. The second assembly block of the relay and safety locks is placed in a motive compartment, near the rechargeable battery, and equipped with a removable cover. And, at last, the safety lock of DRL settles down in the relay No. 3 block.

 Arrangement of blocks of the relay and safety locks in a motive compartment

1 — the relay No. 3 Block
2 — Blocks (No. 2) of the relay and safety locks in a motive compartment, the block of a fusible insert

Arrangement of components of electric equipment and points of grounding (IE, IF, IG, IH) in salon

Each separate safety lock is used for protection of any concrete electric contour or at once several contours.

In assembly blocks the safety locks of a compact design equipped with bayonet contacts, and which if necessary are easily taken by fingers from the nests in the block are used. At refusal any of consumers of the electric power first of all it is always necessary to check a condition of the corresponding safety lock. Include ignition and by means of a lamp sampler probe open plugs of each of safety locks. If the lamp lights up at connection to each of plugs, therefore, a safety lock as it should be. If tension takes place only from giving of food, so the safety lock fused. Let's notice also that usually the case of a safety lock is manufactured of transparent plastic through which it is easy to define a condition of a working crossing point.

When replacing of the fused safety lock strictly you watch that the prepared replaceable element corresponded on the type which failed. The safety locks calculated on various nominal current physically can differ in nothing from each other, without being at the same time interchangeable. Each of electric chains has various working parameters and needs various degree of protection therefore replacement of the safety lock calculated on a certain current, a safety lock with not the corresponding parameters is fraught with the most serious consequences (up to fire emergence). Working parameters of a safety lock are usually designated on its plastic case, besides, color identification in addition is used.

If the new safety lock at once after installation also fails, it does not make sense to make its further replacement, - before it is necessary to reveal and remove the cause of an overload in a chain. In most cases that appears the short circuit of a connecting electrical wiring caused by damage of its isolation. Spare safety locks usually are located in free blocks of the assembly block.