Infiniti Q45. Manual — part 315

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT

NAVIGATION SYSTEM

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5.

Perform self-diagnosis by selecting the “SELF DIAGNOSIS”.

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Self-diagnosis subdivision screen will be shown and the oper-
ation enters the self-diagnosis mode.

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A bar graph shown below the self-diagnosis subdivision
screen indicates progress of the diagnosis.

6.

When the self-diagnosis completes, optional part confirmation
screen will be shown.

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When connection of an optional part is judged error, a screen
to check if the optional part is actually fitted on the vehicle or
not will be shown. When fitted, select the switch of the part on
the screen and press “End”. Then the “SELF DIAGNOSIS”
screen will be shown.

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When the optional part is connected normally, the switch for
the part will not appear on the screen.

7.

On the “SELF DIAGNOSIS” screen, each unit name will be col-
ored according to the diagnosis result, as follows.

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If several malfunctions are present in a unit, color of its switch
on the screen will be either red, yellow, or gray, determined by
the malfunction of the highest priority.

CAUTION:

“Tire Pressure Control Unit” on the screen will be illuminated in yellow when performing self-diag-
nosis with ignition switch in ACC position.

8.

Select a switch on the “SELF DIAGNOSIS” screen and com-
ments for the diagnosis results will be shown.

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When the switch is green, the following comment will be
shown. “Self-diagnosis was successful. Further diagnosis and
adjustments are recommended. Follow the “confirmation and
adjustments” menu or refer to the service manual.”.

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When the switch is yellow, the following comment will be
shown. “Connection to the following unit is abnormal. See the
Service Manual for further details”.

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When the switch is red, the following comment will be shown
“Center Control Unit is abnormal”.

SKIA0382E

PKIA9681E

Green

: No malfunctioning.

Yellow

: Cannot be judged by self-diagnosis results.

Red

: Unit is malfunctioning.

Gray

: Diagnosis has not been done.

PKIC8360E

SKIA0385E

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VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT

NAVIGATION SYSTEM

SELF-DIAGNOSIS RESULT
Quick Reference Table

1.

Select the applicable diagnosis number in the quick reference table of diagnosis result.

2.

Confirm the possible malfunction with the diagnosis table, and then perform inspection.

3.

Turn ignition switch OFF and perform self-diagnosis again.

NOTE:

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Audio AMP = BOSE speaker amp.

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Center Control Unit = AV control unit

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SAT = Satellite radio tuner

*: In a case that screen switch (on the self-diagnosis result screen) is not displayed though the vehicle has
voice activated control module.

Self-diagnosis Codes

Switch

color

Screen switch

Diagnosis

No.

Audio AMP

Center

Control Unit

Audio Unit

Voice

Activated

Control
Module

Tire

Pressure

Control Unit

CD Changer

SAT

Red

×

1

Yellow

×

×

×

×

(Gray)

×

(Gray)

2

×

×

3

×

×

4

×

×

×

(Gray)

×

(Gray)

5

×

×

6

×

×

×

7

×

×

8

Screen
switch not

displayed

*

×

9

Diagnosis

No.

Possible cause

Action to take

1

AV control unit malfunction is detected

Replace AV control unit

2

Malfunction is detected on communication signal between
multifunction switch and audio unit

1. Check communication circuit between multifunction

switch and audio unit.

2. If the results from the above checkup show no malfunc-

tion, replace either multifunction switch or audio unit,
and then start self-diagnosis.

3. If self-diagnosis results still show any malfunction,

replace the other unit.

3

●

Low tire pressure warning control unit power supply and
ground circuit malfunction is detected

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Malfunction is detected on communication signal
between multifunction switch and low tire pressure warn-
ing control unit

1. Check low tire pressure warning control unit power sup-

ply and ground circuit.

2. Check communication circuit between multifunction

switch and low tire pressure warning control unit.

3. If the results from the above checkup show no malfunc-

tion, replace either multifunction switch or low tire pres-
sure warning control unit, and then start self-diagnosis.

4. If self-diagnosis results still show any malfunction,

replace the other unit.

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT

NAVIGATION SYSTEM

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4

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BOSE speaker amp. power supply and ground circuit
malfunction is detected

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Malfunction is detected on communication signal
between audio unit and BOSE speaker amp.

1. Check BOSE speaker amp. power supply and ground

circuit.

2. Check communication circuit between audio unit and

BOSE speaker amp.

3. If the results from the above checkup show no malfunc-

tion, replace either audio unit or BOSE speaker amp.,
and then start self-diagnosis.

4. If self-diagnosis results still show any malfunction,

replace the other unit.

5

Audio unit power supply and ground circuit malfunction is
detected

1. Check audio unit power supply circuit.

2. If the results from the above checkup show no malfunc-

tion, replace audio unit.

6

Without satellite radio

●

Malfunction is detected on communication signal [REQ
(CHG-AUDIO)] between audio unit and CD auto
changer

1. Check communication circuit [REQ (CHG-AUDIO)]

between audio unit and CD auto changer.

2. Check communication signal [REQ (CHG-AUDIO)]

between audio unit and CD auto changer.

3. If the results from the above checkup show no malfunc-

tion, replace either audio unit or CD auto changer, and
then start self-diagnosis.

4. If self-diagnosis results still show any malfunction,

replace the other unit.

With satellite radio

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Malfunction is detected on communication signal [REQ
(CHG-AUDIO)] between audio unit and satellite radio
tuner

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Malfunction is detected on control signal (CONT)
between audio unit and satellite radio tuner

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Malfunction is detected on communication signal [REQ
(CHG-AUDIO)] between satellite radio tuner and CD
auto changer

1. Check communication circuit [REQ (CHG-AUDIO)]

between audio unit and satellite radio tuner.

2. Check control signal circuit (CONT) between audio unit

and satellite radio tuner.

3. Check communication circuit [REQ (CHG-AUDIO)]

between satellite radio tuner and CD auto changer.

4. Check communication signal [REQ (CHG-AUDIO)]

between audio unit and satellite radio tuner.

5. Check control signal (CONT) between audio unit and

satellite radio tuner.

6. Check communication signal [REQ (CHG-AUDIO)]

between satellite radio tuner and CD auto changer.

7. If the results from the above checkup show no malfunc-

tion, replace audio unit, satellite radio tuner, or CD auto
changer, and then start self-diagnosis.

8. If self-diagnosis results still show any malfunction,

replace one of the two units that is not replaced yet.

9. If self-diagnosis results still show any malfunction,

replace the other unit.

Diagnosis

No.

Possible cause

Action to take

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VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT

NAVIGATION SYSTEM

7

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Satellite radio tuner power supply and ground circuit
malfunction is detected

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CD auto changer power supply and ground circuit mal-
function is detected

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Malfunction is detected on communication signal [REQ
(CHG-AUDIO), REQ (SAT-AUDIO), Tx and RX] between
audio unit and satellite radio tuner

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Malfunction is detected on control signal (CONT)
between audio unit and satellite radio tuner

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Malfunction is detected on communication signal [REQ
(CHG-AUDIO), Tx and Rx] between satellite radio tuner
and CD auto changer

1. Check satellite radio tuner power supply and ground cir-

cuit.

2. Check CD auto changer power supply and ground cir-

cuit.

3. Check communication circuit [REQ (CHG-AUDIO), REQ

(SAT-AUDIO), Tx and RX] between audio unit and satel-
lite radio tuner.

4. Check control signal circuit (CONT) between audio unit

and satellite radio tuner.

5. Check communication circuit [REQ (CHG-AUDIO), Tx

and Rx] between satellite radio tuner and CD auto
changer.

6. Check communication signal [REQ (CHG-AUDIO), REQ

(SAT-AUDIO), Tx and RX] between audio unit and satel-
lite radio tuner.

7. Check control signal (CONT) between audio unit and

satellite radio tuner.

8. Check communication signal [REQ (CHG-AUDIO), Tx

and Rx] between satellite radio tuner and CD auto
changer.

9. If the results from the above checkup show no malfunc-

tion, replace audio unit, satellite radio tuner, or CD auto
changer, and then start self-diagnosis.

10.If self-diagnosis results still show any malfunction,

replace one of the two units that is not replaced yet.

11.If self-diagnosis results still show any malfunction,

replace the other unit.

8

Malfunction is detected on communication signal [REQ
(SAT-AUDIO)] between audio unit and satellite radio tuner

1. Check communication circuit [REQ (SAT-AUDIO)]

between audio unit and satellite radio tuner.

2. Check communication signal [REQ (SAT-AUDIO)]

between audio unit and satellite radio tuner.

3. If the results from the above checkup show no malfunc-

tion, replace either audio unit or satellite radio tuner, and
then start self-diagnosis.

4. If self-diagnosis results still show any malfunction,

replace the other unit.

9

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Voice activated control module power supply and ground
circuit malfunction is detected

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Malfunction is detected on communication signal
between AV control unit and voice activated control
module

1. Check voice activated control module power supply and

ground circuit.

2. Check communication circuit between AV control unit

and voice activated control module.

3. If the results from the above checkup show no malfunc-

tion, replace either AV control unit or voice activated
control module, and then start self-diagnosis.

4. If self-diagnosis results still show any malfunction,

replace the other unit.

Diagnosis

No.

Possible cause

Action to take