Infiniti F50. Manual - part 319

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-119

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Power Supply and Ground Circuit Inspection for AV Control Unit

EKS006E1

1. 

CHECK FUSE

Check AV control unit fuses are not blown.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to 

PG-

2, "POWER SUPPLY ROUTING"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect AV control unit connector.

2.

Check voltage between AV control unit and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between AV control unit and fuse.

3. 

CHECK GROUND CIRCUIT

Check continuity between AV control unit harness connector M78
terminal 1 (B), 4 (B) and ground.

OK or NG

OK

>> Inspection end.

NG

>> Repair harness or connector.

Unit

Power source

Fuse No.

AV control unit

Battery power

47

Ignition switch ACC or ON

21

Terminals

Ignition switch position

(+)

(-)

OFF

ACC

ON

Connector

Terminal 

(Wire color)

M78

2 (SB)

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

3 (SB)

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

6 (L/OR)

Ground

0V

Battery 
voltage

Battery 
voltage

SKIA3607E

Continuity should exist.

SKIA3608E

DI-120

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

Power Supply and Ground Circuit Inspection for Display

EKS006E2

1. 

CHECK FUSES

●

Check 15A fuse [No. 52, located in fuse, fusible link and relay block (J/B)] is blown.

●

Check 10A fuse [No. 21, located in fuse block (J/B) No. 1] is blown.

OK or NG

OK

>> GO TO 2.

NG

>> If fuse is blown, be sure to eliminate cause of malfunction before installing new fuse. Refer to 

PG-

2, "POWER SUPPLY ROUTING"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect display connector. 

2.

Check voltage between display connector M82 terminals 19 (L/
OR), 21 (SB), 23 (SB) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between display and fuse.

3. 

CHECK GROUND CIRCUIT

Check continuity between display connector M82 terminal 22, 24
and ground.

OK or NG

OK

>> Inspection end.

NG

>> Repair harness or connector.

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M82

19 (L/OR)

Ground

0V

Battery 
voltage

Battery 
voltage

21 (SB)

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

23 (SB)

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

SKIA0552E

Terminals

Continuity

(+)

(–)

Connector

Terminal

(Wire color)

M82

22 (B)

Ground

Yes

M82

24 (B)

Ground

Yes

SKIA0553E

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-121

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Inspection of Multifunction Switch for Power Supply and Ground Circuit 

EKS006E3

1. 

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect multifunction switch connector.

2.

Check voltage between multifunction switch harness connector
M83 terminal 1 (L/OR) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness for open or short between multifunction switch and fuse.

2. 

CHECK GROUND CIRCUIT

Check continuity between multifunction switch harness connector
M83 terminal 2 (B) and ground.

OK or NG

OK

>> Inspection end.

NG

>> Repair harness or connector.

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(Wire color)

M83

1 (L/OR)

Ground

0V

Battery 
voltage

Battery 
voltage

SKIA0534E

Continuity should exist.

SKIA0535E

DI-122

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

Vehicle Speed Signal Inspection

EKS006E4

1. 

CHECK HARNESS

1.

Disconnect AV control unit and combination meter connector.

2.

Check continuity between AV control unit harness connector
M77 terminal 33 (OR/L) and ground.

3.

Check continuity between AV control unit harness connector
M77 terminal 33 (OR/L) and combination meter harness con-
nector M41 terminal 17 (OR/L).

OK or NG

OK

>> GO TO 2.

NG

>>

●

Check connector housings for disconnected or loose terminals.

●

Repair harness or connector.

2. 

VEHICLE SPEED SIGNAL CHECK 1

1.

Connect AV control unit connector.

2.

Check voltage between AV control unit harness connector M77
terminal 33 (OR/L) and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Replace AV control unit.

3. 

VEHICLE SPEED SIGNAL CHECK 2

1.

Connect combination meter connector.

2.

Start engine and drive vehicle at more than 40 km/h (25 MPH).

3.

Check signal between AV control unit harness connector M77
terminal 33 (OR/L) and ground.

OK or NG

OK

>> Replace AV control unit.

NG

>> Check combination meter. Refer to

DI-23, "Inspection/

Vehicle Speed Signal"

 .

Continuity should not exist.

Continuity should exist.

SKIA3609E

Approx. 3.5V or more

SKIA3610E

33 (OR/L) - Ground

: Refer to 

DI-101, "Termi-

nals and Reference Value 
for AV Control Unit"

 .

SKIA4143E