Subaru BRZ Electrical Manual — part 3

B

The ”Current Flow Chart” section, describes which parts each power source (fuses, fusible links, and circuit breakers)

transmits current to. In the Power Source circuit diagram, the conditions when battery power is supplied to each system

are explained. Since all System Circuit diagrams start from the power source, the power source system must be fully

understood.

AM2

AM1

IG2

ACC

IG1

ST1

ST2

W – R

W

J POWER SOURCE (Current Flow Chart)

The chart below shows the route by which current flows from the battery to each electrical source
(Fusible Link, Circuit Breaker, Fues, etc.) and other parts

30A AM2

Starter

Battery

Fusible Link Block

100A ALT

2

6

6

Short Pin

10A ECU–B

7.5A DOME

2

15A EFI

10A HAZARD

20A RADIO NO.1

10A HORN

60A ABS

2

2

S 2

5

Engine Room R/B (See Page 20)

194
187
180
166
210

214
230
112
122

Page

ABS
ABS and Traction Control
Cruise Control
Electronically Controlled Transmission
Multiplex Communication System

Fuse

STOP

20A

10A

DOME

Cigarette Lighter
Combination Meter
Headlight
Interior Light
Key Reminder and Seat Belt Warning
Light Auto Turn Off System

System

Theft Deterrent and Door Lock Control

1.25B
FL MAIN

Power Source

50A MAIN

4

1

1

2

1

W – R

20A DEFOG

B – Y

8

2

H8

W – R

Ignition or Starter

1

1

7.5A DOME

2

1

R

W

AH1

7

AH1

BA1

1

6

W

W

W

Battery

B

B

B

2

2

1

2

2

2

2

7.5A AM1

15A HAZ–RADIO

1

2

1

2

W

Switch Assembly

*

The system shown here is an EXAMPLE ONLY. It is different to the actual circuit shown in the SYSTEM CIRCUITS SECTION.

BRZ (G4400GE)

9

Black

B1

K CONNECTOR LIST

1 2 3 4

Black

A1

1

2

3

4

5

6

7

8

A2

1 2 3 4 5

7

6

Gray

A3

1

2

3

4

5

6

1 2 3

4 5

6 7 8 9 10111213

B2

[A]

[C]

[D]

[B]

Gray

K CONNECTOR LIST

1 2 3

4 5

6 7 8 9 10 11 12 13

1

2

3

4

5

13

6

7

8

9

10

11

12

BA1

Black

BD2

Gray

[F]

[E]

1 2

3 4

5 6 7 8 9 10 11

11

4 3

2 1

5

6

7

8

9

10

B HOW TO USE THIS MANUAL

[A] : Indicates connector to be connected to a part. (The numeral indicates the pin No.)

[B] : Junction Connector

Indicates a connector which is connected to a short terminal.

Junction Connector

Short Terminal

Junction connector in this manual include a short terminal which is
connected to a number of wire harnesses. Always perform
inspection with the short terminal installed.

[C] : Parts Code

The first letter of the code is taken from the first letter of part, and the numbers indicates its order in parts which
start with the same letter.

[D] : Connector Color

Connectors not indicated are milky white in color.

[E] : Indicates the connector shapes which are used to join wire harnesses.

On Left : Female connector shapes
On Right : Male connector shapes
Numbers indicate pin numbers.

[F] : Indicates connector colors. (Connectors with not indicated colors are white)

BRZ (G4400GE)

10

Memo

BRZ (G4400GE)

11

To Ignition SW
IG Terminal

Fuse

Voltmeter

SW 1

Relay

SW 2

Solenoid

[A]

[B]

[C]

Ohmmeter

SW

Ohmmeter

Diode

Digital Type

Analog Type

C TROUBLESHOOTING

VOLTAGE CHECK

(a) Establish conditions in which voltage is present at the check

point.

Example:

[A] – Ignition SW on
[B] – Ignition SW and SW 1 on
[C] – Ignition SW, SW 1 and Relay on (SW 2 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.

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.

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.

(c) Use a volt/ohmmeter with high impedance (10k /V

minimum) for troubleshooting of the electrical circuit.

BRZ (G4400GE)

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