Lexus ES300 (1997 year). Manual - part 607

11

   C

(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:

A –  Ignition SW on
B –  Ignition SW and SW 1 on
C –  Ignition SW, SW 1 and Relay on (Connect the
        Relay) and SW 2 off (or Disconnect SW 2)

(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.

(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).

CAUTION:

FINDING A SHORT CIRCUIT

DISCONNECTION OF MALE AND FEMALE
CONNECTORS

To pull apart the connectors, pull on the connector itself, not the
wire harness.

HINT:  Check to see what kind of connector you are disconnecting
before pulling apart.

12

C  TROUBLESHOOTING

HOW TO REPLACE TERMINAL
(with terminal retainer or secondary locking
device)

1. PREPARE THE SPECIAL TOOL

HINT: To remove the terminal from the connector, please

construct and use the special tool or like object shown 
on the left.

2. DISCONNECT  CONNECTOR

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.

NOTICE:
Do not remove the terminal retainer from connector body.

A

For Non–Waterproof Type Connector

HINT: The needle insertion position varies according to

the connector’s shape (number of terminals
etc.), so check the position before inserting it.

“Case 1”

Raise the terminal retainer up to the temporary
lock position.

“Case  2”

Open the secondary locking device.

13

   C

For Waterproof Type Connector

HINT: Terminal retainer color is different

according to connector body.

“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 inserting it.

“Case 2”

Type which cannot be pulled as far as
Power Lock insert the tool straight
into the access hole of terminal 
retainer as shown.

B

Example:
Terminal Retainer   

:Connector  Body:

Black or White        

:Gray

Black or White

:Dark Gray

Gray or White

:Black

14

C  TROUBLESHOOTING

(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.

(

c) Release the locking lug from terminal and pull the 

terminal out from rear.

4.

INSTALL TERMINAL TO CONNECTOR

5. CONNECT 

CONNECTOR

Push the terminal retainer down to the temporary lock
position.

(b) Push the secondary locking device or terminal retainer

into the full lock position.