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lexus :: Lexus Truck LX 470 V8-4.7L (2UZ-FE) (
1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and Instructions
Alarm Horn Relay: Diagram Information and Instructions
Key to Diagrams
The following Diagrams are typical examples of Lexus wiring diagrams
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 8
LX 470 V8-4.7L (2UZ-FE) (1999)
A: System TitleB: Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B
Example: 1 Indicates Relay Block No.1
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C: ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.D: Indicates related system.
Wiring Harness Connector
E: Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows. Outside numerals are pin
numbers.The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component's location, e.g, "E" for the EngineCompartment, "I" for the Instrument Panel and Surrounding area, and "B" for the Body and Surrounding area.When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiringharness and wiring harness connector.
F: Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position.
G: Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate
them from other parts.
H: When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ].
Wiring Color
I: Indicates the wiring color.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 9
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire colors are indicated by an alphabetical code.B= BlackL = BlueR = RedP = PinkG = Green W = WhiteV = Violet0 = OrangeY = YellowBR = BrownSB =Sky BlueLG = Light GreenGR = Gray The first letter indicates the basic wire color and the second letter indicates the color of the stripe.
Splice Point
J: Indicates a wiring Splice Point (Codes are "E" for the Engine Room, "I" for the Instrument Panel, and "B" for the Body).
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The Location of splice Point I 5 is indicated by the shaded section.
K: Indicates a shielded cable.
Pin Number Of The Connector
L: Indicates the pin number of the connector. The numbering system is different for female and male connectors.
Example: Numbered in order Numbered in order
from upper left to from upper right to
lower left lower right
M: Indicates a ground point.
The first letter of the code for each ground point(s) indicates the component's location, e.g "E" for the Engine Compartment, "I" for the InstrumentPanel and Surrounding area, and "B" for the Body and Surrounding area.
N: Page No.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 10
LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 11
LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 12
LX 470 V8-4.7L (2UZ-FE) (1999)
How to Read Ground Point
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 13
LX 470 V8-4.7L (2UZ-FE) (1999)
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty groundpoint, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between groundpoints (EA, IB and IC shown below) can also be checked this way.
How to Read Power Source
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The "Current Flow Chart", describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Sourcecircuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the powersource, the power source system must be fully understood.
(Current Flow Chart)
The chart shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 14
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire Color and Terminal Number
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Wire Color And Terminal Number
In some parts of the instrumental panel wiring harness the same wire color (i.e. SB: Sky Blue) is used for all the wiring to a specific connector.In order to identity the wiring, the terminal number is printed on the wiring.Install the wiring to the connector position with the same terminal number.Some early production Vehicles may not have these terminal numbers printed.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 15
Alarm Horn Relay: Diagnostic Aids
Continuity and Resistance Check
Continuity And Resistance Check
(a) Disconnect the battery terminal or wire so there is no voltage between the check points.(b) Contact the two leads of an ohmmeter to each of the check points.
Continuity And Resistance Check
If the circuit has diodes, reverse the two leads and check again.When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity.When contacting the two leads in reverse, there should be no continuity.
Continuity And Resistance Check
(c) Use a volt/ohmmeter with high impedance ( minimum) for troubleshooting of the electrical circuit.10 K Ohms/V
Disconnection of Male and Female Connecotrs
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 16
LX 470 V8-4.7L (2UZ-FE) (1999)
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Disconnection Of Male And Female Connectors
To pull apart the connectors, pull on the connector itself, not the wire harness.
Check to see what kind of connector you are disconnecting before pulling apart.HINT:
Finding A Short Circuit
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 17
LX 470 V8-4.7L (2UZ-FE) (1999)
Finding A Short Circuit
(a) Remove the blown fuse and disconnect all loads of the fuse.(b) Connect a test light in place of the fuse.(c) Establish conditions in which the test light comes on.Example:
ON
A- Ignition SW B- Ignition SW and SW 1 C- Ignition SW, SW 1 and Relay (Connect the Relay) and SW 2 (or Disconnect SW 2)ON ON OFF
(d) Disconnect and reconnect the connectors while watching the test light.
The short lies between the connector where the test light stays lit and the connector where the light goes out.
(e) Find the exact location of the short by lightly shaking the problem wire along the body.
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CAUTION:
(a) Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static
electricity.)
(b) When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with
the terminals of leads from the IC, etc. of the replacement part (spare part).
How to Replace Terminals
Special Tool
With terminal retainer or secondary locking device
1. Prepare The Special Tool
To remove the terminal from the connector, please construct and use the special tool or like object shown on the left.HINT:
2. Disconnect Connector
Terminal Retainer
3. Disengage The Secondary Locking Device Or Terminal Retainer.
(a) Locking device must be disengaged before the terminal locking clip can be released and the terminal removed from the connector.(b) Use a special tool or the terminal pick to unlock the secondary locking device or terminal retainer.
Do not remove the terminal retainer from connector body. NOTE:
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 18
LX 470 V8-4.7L (2UZ-FE) (1999)
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Non-Waterproof Type Connector
- For Non-Waterproof Type ConnectorA
HINT:
The needle insertion position varies according to the connector's shape (number of terminals etc.), so check the position beforeinserting it.
"Case 1"
Raise the terminal retainer up to the temporary lock position.
Non-Waterproof Type Connector
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 19
LX 470 V8-4.7L (2UZ-FE) (1999)
Non-Waterproof Type Connector
"Case 2"
Open the secondary locking device
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B - For Waterproof Type Connector
Terminal retainer color is different according to connector body.HINT:
Example:Terminal Retainer: Connector BodyBlack or White
: Gray
Black or White : Dark Gray
Gray or White : Black
Waterproof Type Connector
"Case 1"
Type where terminal retainer is pulled up to the temporary lock position (Pull Type).
Insert the special tool into the terminal retainer access hole (Mark) and pull the terminal retainer up to the temporary lock position.
HINT:
The needle insertion position varies according to the connector's shape (Number of terminals etc.), so check the position before insertingit.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 20
LX 470 V8-4.7L (2UZ-FE) (1999)
Waterproof Type Connector
"Case 2"
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Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown.
Terminal Retainer
Push the terminal retainer down to the temporary lock position.
Locking Lug
c. Release the locking lug from terminal and pull the terminal out from rear.
Installation Of Terminal To Connector
4. Install terminal to connector
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and
Instructions > Page 21
LX 470 V8-4.7L (2UZ-FE) (1999)
a. Insert the terminal.
:HINT
1. Make sure the terminal is positioned correctly.2. Insert the terminal until the locking lug locks firmly.3. Insert the terminal with terminal retainer in the temporary lock position.
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Secondary Locking Device
b. Push the secondary locking device or terminal retainer in to the full lock position.
5. Connect connector
Voltage Check
Voltage Check
(a) Establish conditions in which voltage is present at the check point.
ON
Example:A- Ignition SW B- Ignition SW and SW 1 C- Ignition SW, SW 1 and Relay (SW 2 )ON ON OFF
(b) Using a voltmeter, connect the negative lead to a good ground point or negative battery terminal, and the positive lead to the connector or
component terminal. This check can be done with a test light instead of a voltmeter.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 22
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Page 23
Alarm Horn Relay: Testing and Inspection
CIRCUIT DESCRIPTION
ON OFF 0.4 sec
ON OFF
OFF OFF
When the theft deterrent system is activated, it causes the Tr in the ECU to switch and in approximately . cycles. This switches the hornrelay and , thus the horns blow (See the wiring diagram).In this condition, if any of the following operations is done, the Tr in the ECU goes and the horn relay switches , thus stopping the horns fromblowing:
ON
1. Unlock the front LH or RH door with key.2. Turn the ignition switch to ACC or position.3. Unlock the doors with the wireless door lock control system.4. Wait for approximately .60 seconds
WIRING DIAGRAM
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Horn Relay > Component Information > Diagrams > Page 24
LX 470 V8-4.7L (2UZ-FE) (1999)
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Step 1
INSPECTION PROCEDURE
HINT
: The flow chart is based on the premise that the horns blow normally whenever the horn switch is operated. If horn operation is not normal whenthe horn switch is operated, check the horn switch.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram Information and Instructions
Alarm Module: Diagram Information and Instructions
Key to Diagrams
The following Diagrams are typical examples of Lexus wiring diagrams
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 29
LX 470 V8-4.7L (2UZ-FE) (1999)
A: System TitleB: Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B
Example: 1 Indicates Relay Block No.1
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C: ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.D: Indicates related system.
Wiring Harness Connector
E: Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows. Outside numerals are pin
numbers.The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component's location, e.g, "E" for the EngineCompartment, "I" for the Instrument Panel and Surrounding area, and "B" for the Body and Surrounding area.When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiringharness and wiring harness connector.
F: Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position.
G: Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate
them from other parts.
H: When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ].
Wiring Color
I: Indicates the wiring color.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 30
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire colors are indicated by an alphabetical code.B= BlackL = BlueR = RedP = PinkG = Green W = WhiteV = Violet0 = OrangeY = YellowBR = BrownSB =Sky BlueLG = Light GreenGR = Gray The first letter indicates the basic wire color and the second letter indicates the color of the stripe.
Splice Point
J: Indicates a wiring Splice Point (Codes are "E" for the Engine Room, "I" for the Instrument Panel, and "B" for the Body).
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The Location of splice Point I 5 is indicated by the shaded section.
K: Indicates a shielded cable.
Pin Number Of The Connector
L: Indicates the pin number of the connector. The numbering system is different for female and male connectors.
Example: Numbered in order Numbered in order
from upper left to from upper right to
lower left lower right
M: Indicates a ground point.
The first letter of the code for each ground point(s) indicates the component's location, e.g "E" for the Engine Compartment, "I" for the InstrumentPanel and Surrounding area, and "B" for the Body and Surrounding area.
N: Page No.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 31
LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 32
LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 33
LX 470 V8-4.7L (2UZ-FE) (1999)
How to Read Ground Point
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 34
LX 470 V8-4.7L (2UZ-FE) (1999)
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty groundpoint, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between groundpoints (EA, IB and IC shown below) can also be checked this way.
How to Read Power Source
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The "Current Flow Chart", describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Sourcecircuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the powersource, the power source system must be fully understood.
(Current Flow Chart)
The chart shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 35
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire Color and Terminal Number
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Wire Color And Terminal Number
In some parts of the instrumental panel wiring harness the same wire color (i.e. SB: Sky Blue) is used for all the wiring to a specific connector.In order to identity the wiring, the terminal number is printed on the wiring.Install the wiring to the connector position with the same terminal number.Some early production Vehicles may not have these terminal numbers printed.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram Information and Instructions > Page 36
Alarm Module: Diagnostic Aids
Continuity and Resistance Check
Continuity And Resistance Check
(a) Disconnect the battery terminal or wire so there is no voltage between the check points.(b) Contact the two leads of an ohmmeter to each of the check points.
Continuity And Resistance Check
If the circuit has diodes, reverse the two leads and check again.When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity.When contacting the two leads in reverse, there should be no continuity.
Continuity And Resistance Check
(c) Use a volt/ohmmeter with high impedance ( minimum) for troubleshooting of the electrical circuit.10 K Ohms/V
Disconnection of Male and Female Connecotrs
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 37
LX 470 V8-4.7L (2UZ-FE) (1999)
Page 56
Disconnection Of Male And Female Connectors
To pull apart the connectors, pull on the connector itself, not the wire harness.
Check to see what kind of connector you are disconnecting before pulling apart.HINT:
Finding A Short Circuit
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 38
LX 470 V8-4.7L (2UZ-FE) (1999)
Finding A Short Circuit
(a) Remove the blown fuse and disconnect all loads of the fuse.(b) Connect a test light in place of the fuse.(c) Establish conditions in which the test light comes on.Example:
ON
A- Ignition SW B- Ignition SW and SW 1 C- Ignition SW, SW 1 and Relay (Connect the Relay) and SW 2 (or Disconnect SW 2)ON ON OFF
(d) Disconnect and reconnect the connectors while watching the test light.
The short lies between the connector where the test light stays lit and the connector where the light goes out.
(e) Find the exact location of the short by lightly shaking the problem wire along the body.
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CAUTION:
(a) Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static
electricity.)
(b) When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with
the terminals of leads from the IC, etc. of the replacement part (spare part).
How to Replace Terminals
Special Tool
With terminal retainer or secondary locking device
1. Prepare The Special Tool
To remove the terminal from the connector, please construct and use the special tool or like object shown on the left.HINT:
2. Disconnect Connector
Terminal Retainer
3. Disengage The Secondary Locking Device Or Terminal Retainer.
(a) Locking device must be disengaged before the terminal locking clip can be released and the terminal removed from the connector.(b) Use a special tool or the terminal pick to unlock the secondary locking device or terminal retainer.
Do not remove the terminal retainer from connector body. NOTE:
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 39
LX 470 V8-4.7L (2UZ-FE) (1999)
Page 60
Non-Waterproof Type Connector
- For Non-Waterproof Type ConnectorA
HINT:
The needle insertion position varies according to the connector's shape (number of terminals etc.), so check the position beforeinserting it.
"Case 1"
Raise the terminal retainer up to the temporary lock position.
Non-Waterproof Type Connector
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 40
LX 470 V8-4.7L (2UZ-FE) (1999)
Non-Waterproof Type Connector
"Case 2"
Open the secondary locking device
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B - For Waterproof Type Connector
Terminal retainer color is different according to connector body.HINT:
Example:Terminal Retainer: Connector BodyBlack or White
: Gray
Black or White : Dark Gray
Gray or White : Black
Waterproof Type Connector
"Case 1"
Type where terminal retainer is pulled up to the temporary lock position (Pull Type).
Insert the special tool into the terminal retainer access hole (Mark) and pull the terminal retainer up to the temporary lock position.
HINT:
The needle insertion position varies according to the connector's shape (Number of terminals etc.), so check the position before insertingit.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 41
LX 470 V8-4.7L (2UZ-FE) (1999)
Waterproof Type Connector
"Case 2"
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Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown.
Terminal Retainer
Push the terminal retainer down to the temporary lock position.
Locking Lug
c. Release the locking lug from terminal and pull the terminal out from rear.
Installation Of Terminal To Connector
4. Install terminal to connector
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram
Information and Instructions > Page 42
LX 470 V8-4.7L (2UZ-FE) (1999)
a. Insert the terminal.
:HINT
1. Make sure the terminal is positioned correctly.2. Insert the terminal until the locking lug locks firmly.3. Insert the terminal with terminal retainer in the temporary lock position.
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Secondary Locking Device
b. Push the secondary locking device or terminal retainer in to the full lock position.
5. Connect connector
Voltage Check
Voltage Check
(a) Establish conditions in which voltage is present at the check point.
ON
Example:A- Ignition SW B- Ignition SW and SW 1 C- Ignition SW, SW 1 and Relay (SW 2 )ON ON OFF
(b) Using a voltmeter, connect the negative lead to a good ground point or negative battery terminal, and the positive lead to the connector or
component terminal. This check can be done with a test light instead of a voltmeter.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Diagram Information and Instructions > Page 43
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Page 44
Alarm Module: Testing and Inspection
CIRCUIT DESCRIPTION
This circuit provides power to operate the theft deterrent ECU.
WIRING DIAGRAM
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Alarm Module, (Vehicle Antitheft) > Component Information > Diagrams > Page 45
LX 470 V8-4.7L (2UZ-FE) (1999)
Page 72
Step 1
Step 2
Step 3
INSPECTION PROCEDURE
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information and Instructions
Antitheft Lighting Relay: Diagram Information and Instructions
Key to Diagrams
The following Diagrams are typical examples of Lexus wiring diagrams
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 50
LX 470 V8-4.7L (2UZ-FE) (1999)
A: System TitleB: Indicates a Relay Block. No shading is used and only the Relay Block No. is shown to distinguish it from the J/B
Example: 1 Indicates Relay Block No.1
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C: ( ) is used to indicate different wiring and connector, etc. when the vehicle model, engine type, or specification is different.D: Indicates related system.
Wiring Harness Connector
E: Indicates the wiring harness and wiring harness connector. The wiring harness with male terminal is shown with arrows. Outside numerals are pin
numbers.The first letter of the code for each wiring harness and wiring harness connector(s) indicates the component's location, e.g, "E" for the EngineCompartment, "I" for the Instrument Panel and Surrounding area, and "B" for the Body and Surrounding area.When more than one code has the first and second letters in common, followed by numbers (e.g, IH1, IH2), this indicates the same type of wiringharness and wiring harness connector.
F: Represents a part (all parts are shown in sky blue). The code is the same as the code used in parts position.
G: Junction Block (The number in the circle is the J/B No. and the connector code is shown beside it). Junction Blocks are shaded to clearly separate
them from other parts.
H: When 2 parts both use one connector in common, the parts connector name used in the wire routing section is shown in square brackets [ ].
Wiring Color
I: Indicates the wiring color.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 51
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire colors are indicated by an alphabetical code.B= BlackL = BlueR = RedP = PinkG = Green W = WhiteV = Violet0 = OrangeY = YellowBR = BrownSB =Sky BlueLG = Light GreenGR = Gray The first letter indicates the basic wire color and the second letter indicates the color of the stripe.
Splice Point
J: Indicates a wiring Splice Point (Codes are "E" for the Engine Room, "I" for the Instrument Panel, and "B" for the Body).
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The Location of splice Point I 5 is indicated by the shaded section.
K: Indicates a shielded cable.
Pin Number Of The Connector
L: Indicates the pin number of the connector. The numbering system is different for female and male connectors.
Example: Numbered in order Numbered in order
from upper left to from upper right to
lower left lower right
M: Indicates a ground point.
The first letter of the code for each ground point(s) indicates the component's location, e.g "E" for the Engine Compartment, "I" for the InstrumentPanel and Surrounding area, and "B" for the Body and Surrounding area.
N: Page No.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
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LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 53
LX 470 V8-4.7L (2UZ-FE) (1999)
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 54
LX 470 V8-4.7L (2UZ-FE) (1999)
How to Read Ground Point
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
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LX 470 V8-4.7L (2UZ-FE) (1999)
The ground points circuit diagram shows the connections from all major parts to the respective ground points. When troubleshooting a faulty groundpoint, checking the system circuits which use a common ground may help you identify the problem ground quickly. The relationship between groundpoints (EA, IB and IC shown below) can also be checked this way.
How to Read Power Source
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The "Current Flow Chart", describes which parts each power source (fuses, fusible links, and circuit breakers) transmits current to. In the Power Sourcecircuit diagram, the conditions when battery power is supplied to each system are explained. Since all System Circuit diagrams start from the powersource, the power source system must be fully understood.
(Current Flow Chart)
The chart shows the route by which current flows from the battery to each electrical source (Fusible Link, Circuit Breaker, Fuse, etc.) and other parts.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 56
LX 470 V8-4.7L (2UZ-FE) (1999)
Wire Color and Terminal Number
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Wire Color And Terminal Number
In some parts of the instrumental panel wiring harness the same wire color (i.e. SB: Sky Blue) is used for all the wiring to a specific connector.In order to identity the wiring, the terminal number is printed on the wiring.Install the wiring to the connector position with the same terminal number.Some early production Vehicles may not have these terminal numbers printed.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information and Instructions > Page 57
Antitheft Lighting Relay: Diagnostic Aids
Continuity and Resistance Check
Continuity And Resistance Check
(a) Disconnect the battery terminal or wire so there is no voltage between the check points.(b) Contact the two leads of an ohmmeter to each of the check points.
Continuity And Resistance Check
If the circuit has diodes, reverse the two leads and check again.When contacting the negative lead to the diode positive side and the positive lead to the negative side, there should be continuity.When contacting the two leads in reverse, there should be no continuity.
Continuity And Resistance Check
(c) Use a volt/ohmmeter with high impedance ( minimum) for troubleshooting of the electrical circuit.10 K Ohms/V
Disconnection of Male and Female Connecotrs
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
and Instructions > Page 58
LX 470 V8-4.7L (2UZ-FE) (1999)
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Disconnection Of Male And Female Connectors
To pull apart the connectors, pull on the connector itself, not the wire harness.
Check to see what kind of connector you are disconnecting before pulling apart.HINT:
Finding A Short Circuit
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and Instructions > Page 59
LX 470 V8-4.7L (2UZ-FE) (1999)
Finding A Short Circuit
(a) Remove the blown fuse and disconnect all loads of the fuse.(b) Connect a test light in place of the fuse.(c) Establish conditions in which the test light comes on.Example:
ON
A- Ignition SW B- Ignition SW and SW 1 C- Ignition SW, SW 1 and Relay (Connect the Relay) and SW 2 (or Disconnect SW 2)ON ON OFF
(d) Disconnect and reconnect the connectors while watching the test light.
The short lies between the connector where the test light stays lit and the connector where the light goes out.
(e) Find the exact location of the short by lightly shaking the problem wire along the body.
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CAUTION:
(a) Do not open the cover or the case of the ECU unless absolutely necessary. (If the IC terminals are touched, the IC may be destroyed by static
electricity.)
(b) When replacing the internal mechanism (ECU part) of the digital meter, be careful that no part of your body or clothing comes in contact with
the terminals of leads from the IC, etc. of the replacement part (spare part).
How to Replace Terminals
Special Tool
With terminal retainer or secondary locking device
1. Prepare The Special Tool
To remove the terminal from the connector, please construct and use the special tool or like object shown on the left.HINT:
2. Disconnect Connector
Terminal Retainer
3. Disengage The Secondary Locking Device Or Terminal Retainer.
(a) Locking device must be disengaged before the terminal locking clip can be released and the terminal removed from the connector.(b) Use a special tool or the terminal pick to unlock the secondary locking device or terminal retainer.
Do not remove the terminal retainer from connector body. NOTE:
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LX 470 V8-4.7L (2UZ-FE) (1999)
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Non-Waterproof Type Connector
- For Non-Waterproof Type ConnectorA
HINT:
The needle insertion position varies according to the connector's shape (number of terminals etc.), so check the position beforeinserting it.
"Case 1"
Raise the terminal retainer up to the temporary lock position.
Non-Waterproof Type Connector
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and Instructions > Page 61
LX 470 V8-4.7L (2UZ-FE) (1999)
Non-Waterproof Type Connector
"Case 2"
Open the secondary locking device
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B - For Waterproof Type Connector
Terminal retainer color is different according to connector body.HINT:
Example:Terminal Retainer: Connector BodyBlack or White
: Gray
Black or White : Dark Gray
Gray or White : Black
Waterproof Type Connector
"Case 1"
Type where terminal retainer is pulled up to the temporary lock position (Pull Type).
Insert the special tool into the terminal retainer access hole (Mark) and pull the terminal retainer up to the temporary lock position.
HINT:
The needle insertion position varies according to the connector's shape (Number of terminals etc.), so check the position before insertingit.
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> Relays and Modules > Relays and Modules - Accessories and Optional Equipment > Antitheft Lighting Relay > Component Information > Diagrams > Diagram Information
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LX 470 V8-4.7L (2UZ-FE) (1999)
Waterproof Type Connector
"Case 2"
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Type which cannot be pulled as far as Power Lock insert the tool straight into the access hole of terminal retainer as shown.
Terminal Retainer
Push the terminal retainer down to the temporary lock position.
Locking Lug
c. Release the locking lug from terminal and pull the terminal out from rear.
Installation Of Terminal To Connector
4. Install terminal to connector
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