Infiniti G35 (V35). Manual - part 138

NAVIGATION SYSTEM

AV-67

C

D

E

F

G

H

I

J

L

M

A

B

AV

Power Supply and Ground Circuit Inspection for Display Unit and NAVI Switch

NKS002G3

1. 

CHECK FUSE

Check the following fuses of the display unit and NAVI switch. 

OK or NG

OK

>> GO TO 2.

NG

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

PG-3, "POWER SUPPLY ROUTING CIRCUIT"

 .

2. 

CHECK POWER SUPPLY CIRCUIT

1.

Check voltage between display unit harness connector and
ground.

2.

Check voltage between NAVI switch harness connector and
ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check the following.

●

Harness for open or short between display unit and
fuse.

●

Harness for open or short between NAVI switch and fuse.

Unit

Terminals

Power source

Fuse No.

Connector

Terminal

Display unit

M35

21

Battery power

37

23

19

Ignition switch 

ACC or ON

6

NAVI switch

M37

1

Unit

Terminals

OFF

ACC

ON

(+)

(–)

Connector

Terminal

Display 

unit

M35

21

Ground

Battery 
voltage

Battery 
voltage

Battery 
voltage

23

Battery 
voltage

Battery 
voltage

Battery 
voltage

19

0 V

Battery 
voltage

Battery 
voltage

Unit

Terminals

OFF

ACC

ON

(+)

(–)

NAVI 

switch

Connector

Terminal

Ground

0 V

Battery 
voltage

Battery 
voltage

M37

1

SKIA8543E

SKIA8544E

AV-68

NAVIGATION SYSTEM

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display unit connector.

3.

Check continuity between display unit harness connector and
ground.

4.

Disconnect NAVI switch connector.

5.

Check continuity between NAVI switch harness connector M37
terminal 7 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Repair or replace harness.

Vehicle Speed Signal Inspection

NKS002G4

1. 

CHECK VEHICLE SPEED OPERATION

Does speed meter operate normally?

YES or NO

YES

>> GO TO 2.

NO

>> Check combination meter trouble diagnosis. Refer to 

DI-12, "Self-Diagnosis Mode of Combination

Meter"

 .

2. 

CHECK HARNESS

1.

Turn ignition switch OFF.

2.

Disconnect NAVI control unit connector and combination meter connector.

3.

Check continuity between NAVI control unit harness connector
(A) M58 terminal 66 and combination meter harness connector
(B) M19 terminal 14.

4.

Check continuity NAVI control unit harness connector (A) M58
terminal 66 and ground.

OK or NG

OK

>> GO TO 3.

NG

>>

●

Check harness for open or short between NAVI con-
trol unit and combination meter.

●

Check connector housings for disconnected or loose terminals.

Unit

Terminals

Continuity

Display unit

Connector  

Terminal

Ground

M35

22

Yes

24

SKIA1897E

7 – Ground

: Continuity should exist.

SKIA2007E

66 – 14

: Continuity should exist.

66 – Ground

: Continuity should exist.

SKIB7261E

NAVIGATION SYSTEM

AV-69

C

D

E

F

G

H

I

J

L

M

A

B

AV

3. 

CHECK VEHICLE SPEED SIGNAL 

1.

Connect NAVI control unit connector and combination meter connector.

2.

Drive vehicle at a constant speed of 40 km/h (25 MPH).

3.

Check the signal between NAVI control unit harness connector
M58 terminal 66 and ground with CONSULT-Il or oscilloscope.

OK or NG

OK

>> Replace NAVI control unit.

NG

>> Check combination meter system. Refer to 

DI-12, "Self-

Diagnosis Mode of Combination Meter"

 .

Illumination Signal Inspection

NKS002G5

1. 

CHECK TAIL LAMP OPERATION

When lighting switch is turned to 1st or 2nd position, does tail lamp illuminate?

YES or NO

YES

>> GO TO 2.

NO

>> Go to tail lamp trouble diagnosis. Refer to 

LT-119, "Parking, License Plate, Side Marker and Tail

Lamps Do Not Illuminate"

 .

2. 

CHECK ILLUMINATION SIGNAL

Check voltage between NAVI control unit harness connector and
ground.

OK or NG

OK

>> Replace NAVI control unit.

NG

>> Check harness for open or short between NAVI control unit and IPDM E/R. Refer to 

LT-112, "Wir-

ing Diagram — TAIL/L —"

 .

Ignition Signal Inspection

NKS002G6

1. 

CHECK FUSE

Make sure that the following fuses of the NAVI control unit.

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-

3, "POWER SUPPLY ROUTING CIRCUIT"

 .

66 – Ground

: Refer to 

AV-53, "Terminals and 

Reference Value for NAVI Control 
Unit"

 .

SKIB7262E

Terminals

Lighting switch 

position

Voltage (V)

(+)

(–)

Connector

Terminal

M58

61

Ground

1st or 2nd 

position

Approx. 12 V

OFF

Approx. 0 V 

SKIB7263E

Terminals

Power source

Fuse No.

Connector

Terminal

M58

63

Ignition switch 

ON or START

12

AV-70

NAVIGATION SYSTEM

2. 

CHECK IGNITION SIGNAL

1.

Turn ignition switch ON.

2.

Check voltage between NAVI control unit harness connector
and ground.

OK or NG

OK

>> Replace NAVI control unit.

NG

>> Repair harness or connector.

Reverse Signal Inspection (With A/T)

NKS002G7

1. 

CHECK REVERSE LAMP

1.

Turn ignition switch ON.

2.

With the A/T selector lever in R position, is the indicator turned on?

YES or NO

YES

>> GO TO 2.

NO

>> Check back-up lamp system. Refer to 

LT-106, "BACK-UP LAMP"

 .

2. 

CHECK REVERSE SIGNAL

1.

With the A/T selector lever in R position.

2.

Check voltage between NAVI control unit harness connector
and ground.

OK or NG

OK

>> Replace NAVI control unit.

NG

>> Check harness for open or short between NAVI control unit and back-up lamp relay.

Reverse Signal Inspection (With M/T)

NKS002G8

1. 

CHECK REVERSE LAMP

1.

Turn ignition switch ON.

2.

With the selection lever in R-position, are the reverse lamps turned on?

YES or NO

YES

>> GO TO 2.

NO

>> Check back-up lamp system. Refer to 

LT-106, "BACK-UP LAMP"

 .

Terminals

Ignition switch position

(+)

(–)

Connector

Terminal

ON

OFF

M58

63

Ground

Battery voltage

Approx. 0 V

SKIB7264E

Terminals

A/T selector 

lever position

Voltage (V)

(+)

(–)

Connector

Terminal

M58

65

Ground

R position

Battery voltage

Other than

R position

Approx. 0 V 

SKIB7265E