GENUINE NAVIGATION SYSTEM PANEL INSPECTION

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1. Disconnect the negative battery cable and wait for 1 min or more. (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

2. Remove the genuine navigation system panel from the dashboard with the connector connected. (See \nGENUINE NAVIGATION SYSTEM PANEL REMOVAL/INSTALLATION.)

3. Connect the negative battery cable. (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-D 2.2].) (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5].) (See \nNEGATIVE BATTERY CABLE DISCONNECTION/CONNECTION [SKYACTIV-G 2.0, SKYACTIV-G 2.5 (WITHOUT i-stop)].)

4. Verify that the voltages of each of the terminals are as indicated in the terminal voltage table (reference).

• If the voltage is not as specified in the terminal voltage table (reference), inspect the parts under Inspection item(s).

― If the system does not work normally even though the inspection items are normal, replace the genuine navigation system panel.

Terminal Voltage Table (Reference)

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Terminal

Signal name

Connected to

Measurement condition

Voltage (V)

Inspection item(s)

A

SW1 (ACU)

Car-navigation unit

Verify the current value between the car-navigation unit and the genuine navigation system panel because the terminal voltage at this terminal cannot be examined.

(See Inspection 1.)

B

Power supply (ACC1)

ACC relay

Ignition switch ON (engine off or on)

B+

• ACC relay

• Related wiring harness

Ignition switch OFF (LOCK) or ACC

1.0 or less

C

SW3 (ACU)

Car-navigation unit

Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.

(See Inspection 2.)

D

SW2 (ACU)

Car-navigation unit

Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.

(See Inspection 2.)

E

TNS

Car-navigation unit

Verify if the LED is illuminated/turned off because the terminal voltage at this terminal cannot be examined.

(See Inspection 3.)

F

SW1 (ST)

Steering switch

Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.

G

SW2 (ST)

Steering switch

Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.

H

—

—

—

—

—

I

Panel control

Instrument cluster

Verify if the LED is illuminated/turned off because the terminal voltage at this terminal cannot be examined.

J

—

—

—

—

—

K

Ground

Body ground

Under any condition

1.0 or less

Body ground

L

—

—

—

—

—

Terminal	Signal name	Connected to	Measurement condition	Voltage (V)	Inspection item(s)
A	SW1 (ACU)	Car-navigation unit	Verify the current value between the car-navigation unit and the genuine navigation system panel because the terminal voltage at this terminal cannot be examined. (See Inspection 1.)
B	Power supply (ACC1)	ACC relay	Ignition switch ON (engine off or on)	B+	• ACC relay • Related wiring harness
Ignition switch OFF (LOCK) or ACC	1.0 or less
C	SW3 (ACU)	Car-navigation unit	Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined. (See Inspection 2.)
D	SW2 (ACU)	Car-navigation unit	Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined. (See Inspection 2.)
E	TNS	Car-navigation unit	Verify if the LED is illuminated/turned off because the terminal voltage at this terminal cannot be examined. (See Inspection 3.)
F	SW1 (ST)	Steering switch	Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.
G	SW2 (ST)	Steering switch	Verify the resistance between the genuine navigation system panel terminals because the terminal voltage at this terminal cannot be examined.
H	—	—	—	—	—
I	Panel control	Instrument cluster	Verify if the LED is illuminated/turned off because the terminal voltage at this terminal cannot be examined.
J	—	—	—	—	—
K	Ground	Body ground	Under any condition	1.0 or less	Body ground
L	—	—	—	—	—

Inspection 1

1. Disconnect the negative battery cable.

2. Connect the tester (capable of reading 1A or more) between car-navigation unit terminal 1N and genuine navigation system panel terminal A.

3. Connect the negative battery cable.

4. Switch the ignition ON (engine off or on).

5. Press the volume adjustment button (-) and (+), cue/automatic band selector button (up) and (down), MODE button, and MUTE button to verify that the current value between the genuine navigation system panel terminals is as indicated in the table.

Genuine navigation system panel current value (reference)

Switch condition	Current value (A)
Volume adjustment button (-)	Approx. 9.3 mA
Volume adjustment button (+)	Approx. 3.4 mA
Cue/automatic band selector button (up)	Approx. 1.6 mA
Cue/automatic band selector button (down)	Approx. 0.8 mA
MODE button	Approx. 0.4 mA
MUTE button	Approx. 0.2 mA

Inspection 2

1. Verify that the resistance between the genuine navigation system panel terminals is as indicated in the table.

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• If not as indicated in the table, replace the genuine navigation system panel.

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Inspection 3

1. Apply battery positive voltage to genuine navigation system panel terminal E, and connect terminal I to ground.

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2. Verify that the LED is illuminated.

• If the LED is not illuminated, replace the genuine navigation system panel. (See \nGENUINE NAVIGATION SYSTEM PANEL REMOVAL/INSTALLATION.)