Troubleshooting Wiring Diagram

To Cru«t# Control and Trip Computer fpnrn

6-terminal Connector fpnrn

F

3

2

1

Fue» Sender Gau^e

Speedometer 17-terminal Connector

IU

P

i

U 4

« E

P

35

r

OH

Combination Meter Fuel Warning | [OverKeet Warning

Combination Meter Fuel Warning | [OverKeet Warning

To Cru«t# Control and Trip Computer

To Igniter

Fue» Sender Gau^e

Speedometer 17-terminal Connector

Trip Meter Ecu Diagram
• Battery

^ o

Z _ O

13

O <3 >

Speed

Speed

Scatc

Counter

Change

1Speed

Switch

Senior)

Dim

Dim signal

Body ground of power source

Signal ground

EXP

Magnifier signal

4P

4-pulse signal

FR

Remaining fuel quantity signal

FV

Power source of fuel sender gauge

GND

Circuit ground

IG®

Power source

IG©

RPM signal

KMSW

Conversion signal

Si

Speed sensor signal (20-pulse)

ST

Starting signal

TACHO Si

Wave form rectification signal of IG0

TEMP

TEMP signal

TC

Dim restriction signal

TR

Dim signal

VDO

Power source of receiver gauge

Trouble

Refer to

Speedometer

No display at all

A

Speedometer displays (0) while driving.

B

Flickers or fluctuates

Check cable

Abnormal display Difficult to comprehend

Replace speedometer

Lights do not dim when light and rheostat S/W turned ON.

C

Display disappears when rheostat is turned with light S/W ON.

D

Brightness does not change even when rheostat is turned.

E

Abnormal speedometer signal

F

No speed unit conversion

G

Tachometer

No display at all

H

Zero indication even with engine running.

1

Abnormal display

Wrong display, no display change or constant display change from correct to "0" or no display at all.

Replace tachometer

Lights do not dim when light and rheostat S/W turned ON.

J

Fuel Gauge

No display at all

K

Fuel scale change display (magnifier) does not illuminate.

L

Fuel warning light does not light.

M

Fuel warning light always lit.

N

Abnormal display

No display segment or intermediate segment illumination. No figure or symbol indication.

Replace fuel and temp, gauges

Defective display

O

Lights do not dim when light and rheostat S/W turned ON.

Temp. Gauge

No display at all

K

Top segment does not flash.

M

Abnormal display

Both indicator segments lit. No figure or symbol indication, etc.

Replace fuel and temp, gauges

Wrong display

Display segment does not rise. Top segment flashes always. Unstable display, etc.

Q

Lights do not dim when light and rheostat S/W turned ON.

P

NOTE: The "sub-harness (SST)" appearing in the following pages of the Troubleshooting Section refer to SST 09082-00100. Digital Meter Check Sub-Harness.

Digital Rpm Meter Circuit Diagram

SECTION

TROUBLE

A

Speedometer

No display at all

Only speedometer ? No

Replace

Replace

Display?

Fuse blows with meter disconnected

Fuse blows

Check vehicle side

Display when other meters disconnected?

@ With the ignition S/W at ON position, check that there is 4.0 - 6.0V at terminal FV of fuel sender gauge.

Replace speedometer

(4) With the ignition S/W at ON position, check that there is 4.0 - 6.0V between terminals 2 and 6 of tachometer connector.

(5) Check for short between terminal VDD and body ground of each meter.

Short

Replace bad gauge

Remove meter and connector sub harness(SST)

@ With the ignition S/W at ON position, check that there is battery voltage between terminals 8 and 16 of sub-harness (SST).

Bad wiring between fuse and meter

Only speedometer display when other meters disconnected?

Replace bad gauge

Replace speedometer

Connect meters one by one and check when speedometer display goes out.

Toyota Speed Meter Tacho

Sub-harness (SST)

Wiring Connector of Fuel Sender Gauge

Tachometer

Fuel Sender Gauge

CAUTION: Never short circuit terminal FV

Tachometer

SECTION

TROUBLE

B

Speedometer

Speedometer displays (0] while driving

Toyota Supra Ignition Wiring Diagram2000 Toyota Corolla Evap Diagram

SECTION

TROUBLE

c

Speedometer

Lights do not dim when light and rheostat S/W turned ON.

Sub-harness ISST)

Sub-harness ISST)

Rheostat

Rheostat Wiring Diagram

Rheostat

SECTION

TROUBLE

D

Speedometer

Display disappears when rheostat is turned with light S/W ON

Toyota Celica Electric DiagramToyota Sub Installation

SECTION

TROUBLE

E

Speedometer

Brightness does not change when rheostat is turned

Only speedometer and tachometer?

Replace speedometer

Only tachometer?

Remove tachometer and connect sub-harness (SST)

Remove meter and connect sub-harness (SST).

0With the ignition S/W at ON position, check that voltage between terminals 4 and 6 of tachometer connector is more than 3V with rheostat at MAX.

©With the light S/W turned ON, does voltage between terminals 1 and 7 of sub-harness vary from 0 to 9V when rheostat is turned?

Replace tachometer

Replace speedometer

(3) With the light S/W turned ON.does voltage between terminals TR and E of rheostat vary when rheostat is operated?

Check rheostat (See page BE-18)

Bad wiring between rheostat and meter emove other meters and check for brightness change of speedometer.

Replace speedometer

Connect other meters one by one to find bad meter.

| Replace bad meter

Toyota Tercel Speedometer Connect

Tachometer

Sub-harness ISST)

Rheostat

(Bright)

SECTION

TROUBLE

F

Speedometer

Abnormal speedometer signal

SECTION

TROUBLE

G

Speedometer

No speed unit conversion

Remove meter and connect sub-harness (SST)

.. ..

© With the ignition S/W at ON position, is there speed unit conversion when rear terminals are short-circuited?

No

Yes

Replace speedometer

Replace speed scale change S/W

2zz Ecu Pinout

SECTION

TROUBLE

H

Tachometer

No display at all

315d Troubleshooting DiagramAbnormal Combustion Diagram

SECTION

TROUBLE

1

Tachometer

Zero indication even with engine running

315d Troubleshooting DiagramSupra Mark

SECTION

TROUBLE

J

Tachometer

Lights do not dim when light and rheostat S/W turned ON.

Abnormal Combustion Diagram

NOTE:

Connector dimming is performed by the dim signal ([email protected]) of the speedometer.

Abnormal Combustion Diagram

SECTION

TROUBLE

K

Fuel gauge Temp, gauge

No display at all

For Fuel Gauge

For Temp. Gauge

Toyota Rav4 Fuel Gauge Connector

SECTION

TROUBLE

L

Fuel gauge

Fuel scale change display (magnifier) does not illuminate

315d Troubleshooting Diagram

SECTION

TROUBLE

M

Fuel gauge

Warning light does not light

SECTION

TROUBLE

N

Fuel gauge

Warning light always lit

SECTION

TROUBLE

0

Fuel gauge

Defective display

Is fuel sender gauge OK? (See page BE-59)

Replace fuel sender gauge

Remove meter and connect sub-harness (SST)

0 With the ignition S/W at ON position and fuel and temp, gauges removed, is there voltage between terminals 5 and 8 of speedometer?

Replace fuel and temp, gauges

Replace speedometer

1991 Toyota Celica Fuel Pump Relay

SECTION

TROUBLE

P

Fuel gauge Water temp, gauge

Lights do not dim when light and rheostat S/W turned ON.

For Fuel Gauge For Temp. Gauge

Mk2 Supra Rear Suspension

Fuel and Temp. Gauges

SECTION

TROUBLE

Q

Water temp, gauge

Defective indication

2006 Toyota Celica Engine Compartment

Replace fuel and temp, gauges

Mk2 Supra Rear Suspension
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Responses

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