Infiniti M45 (Y34). Manual - part 319

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-121

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Power Supply and Ground Circuit Inspection for Display

AKS004OJ

1. 

CHECK FUSES

Check the followings.

●

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

●

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 harness connector M82 termi-
nals and ground.

OK or NG

OK

>> GO TO 3.

NG

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

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between display harness connector M82 termi-
nals 22 (B), 24 (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)

M82

19 (L/B)

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

Continuity should exist.

SKIA0553E

DI-122

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

Inspection of Multifunction Switch for Power Supply and Ground Circuit 

AKS004OK

1. 

CHECK POWER SUPPLY CIRCUIT

1.

Disconnect multifunction switch connector.

2.

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

OK or NG

OK

>> GO TO 2.

NG

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

2. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Check continuity between multifunction switch harness connec-
tor M83 terminal 2 (B) and ground.

OK or NG

OK

>> Inspection end.

NG

>> Repair harness or connector.

Vehicle Speed Signal Inspection

AKS004OL

1. 

CHECK HARNESS

1.

Disconnect connectors of AV control unit and combination
meter.

2.

Check continuity between AV control unit harness connector
M77 terminal 33 (OR/L) and combination meter harness con-
nector M41 terminal 37 (OR/L).

3.

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

OK or NG

OK

>> GO TO 2.

NG

>>

●

Check connector housings for disconnected or loose terminals.

●

Repair harness or connector.

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

ON

Connector

Terminal

(wire color)

M83

1 (L/B)

Ground

0V

Battery 
voltage

Battery 
voltage

SKIA0534E

Continuity should exist.

SKIA0535E

Continuity should exist.

Continuity should not exist.

SKIA4203E

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-123

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2. 

VEHICLE SPEED SIGNAL CHECK 1

1.

Connect AV control unit connector.

2.

Turn ignition switch ON.

3.

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 voltage 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-16, "Vehicle

Speed Signal Inspection"

 .

Illumination Control Signal Inspection

AKS004OM

1. 

CHECK ILLUMINATION CONTROL SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between AV control unit harness connector M77
terminal 25 (B/L) and ground.

OK or NG

OK

>> Replace AV control unit.

NG

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

Approx. 5V

SKIA3610E

33 (OR/L) - Ground

: Refer to 

DI-107, "Terminals and 

Reference Value for AV Control 
Unit"

 .

PKIA6793E

Terminals

Lighting switch 

condition

Voltage (V)

(+)

(–)

Connector

Terminal 

(Wire color)

 M77

25 (R/L)

Ground

ON (1st position) 

Approx. 12V

OFF

Approx. 0V

SKIA3611E

DI-124

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

Ignition Signal Inspection

AKS004ON

1. 

CHECK IGNITION SIGNAL

1.

Disconnect AV control unit connector.

2.

Check voltage between AV control unit harness connector M77
terminal 27 (BR/W) and ground.

OK or NG

OK

>> Replace AV control unit.

NG

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

RGB Screen is Not Shown

AKS004OO

1. 

CHECK HARNESS

1.

Disconnect connectors of AV control unit and display.

2.

Check continuity between AV control unit harness connector
M78 terminal 12 (B) and display harness connector M82 termi-
nal 8 (B).

3.

Check continuity between AV control unit harness connector
M78 terminal 13 (W) and display harness connector M82 termi-
nal 5 (W).

4.

Check continuity between AV control unit harness connector
M78 terminal 12 (B), 13 (W) and ground.

OK or NG

OK

>> GO TO 2.

NG

>>

●

Check connector housings for disconnected or loose terminals.

●

Repair harness or connector.

2. 

CHECK HORIZONTAL SYNCHRONIZATION SIGNAL

1.

Connect connectors of AV control unit and display.

2.

Turn ignition switch ON.

3.

Check voltage signal between AV control unit harness connector
M78 terminals 13 (W) and 10.

OK or NG

OK

>> GO TO 3.

NG

>> Replace display.

Terminals

Ignition switch position

(+)

(-)

OFF

ACC

ON

Connector

Terminal 

(Wire color)

M77

27 (BR/W)

Ground

0V

0V

Battery 
voltage

SKIA3612E

Continuity should exist.

Continuity should exist.

Continuity should not exist.

SKIA3594E

13 (W) - 10

: Refer to 

DI-107, "Terminals and 

Reference Value for AV Control 
Unit"

 .

PKIA6794E