Infiniti Q45. Manual - part 317

 

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Infiniti Q45. Manual - part 317

 

 

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-135

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CD CHANGER
[ABNORMAL CONNECTION]

Without satellite radio

CD auto changer power supply and 
ground circuit malfunction is detected

Malfunction is detected on communica-
tion signal [REQ (CHG-AUDIO), Tx and 
RX] between audio unit and CD auto 
changer

1. Check CD auto changer power supply and ground 

circuit.

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

Tx and RX] between audio unit and CD auto 
changer.

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

Tx and RX] between audio unit and CD auto 
changer.

4. If the results from the above checkup show no mal-

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

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

replace the other unit.

With satellite radio

CD auto changer power supply and 
ground circuit malfunction is detected

Satellite radio tuner power supply and 
ground circuit malfunction is detected

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

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

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

1. Check CD auto changer power supply and ground 

circuit.

2. Check satellite radio tuner power supply and ground 

circuit.

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

REQ (SAT-AUDIO), Tx and RX] between audio unit 
and satellite 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 satellite 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 mal-

function, 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.

FRONT SEAT DISPLAY
[ABNORMAL CONNECTION]

Display power supply and ground circuit 
malfunction is detected

1. Check display power supply and ground circuit.

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

function, replace display.

VOICE UNIT
[ABNORMAL CONNECTION]

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

Malfunction is detected on communica-
tion 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 mal-

function, replace either AV control unit or voice acti-
vated control module, and then start self-diagnosis.

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

replace the other unit.

Error item

Possible cause

Action to take

DI-136

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DATA MONITOR

Displays status of the vehicle signal input to the AV control unit.
(Refer to 

DI-131, "CONFIRMATION/ADJUSTMENT MODE"

  for

operation conditions for the connections to be indicated.)

For each signal, a comparison of actual operating status and the status recognized by the system can be
checked.

Multifunction Switch Self-Diagnosis Function

NKS001CR

It can check ON/OFF operation of each switch in the multifunction switch and diagnose the input signals to the
rear control switch (audio) and steering switch (audio).

DIAGNOSIS FUNCTION

It can illuminate all the indicators (LED) in the multifunction switch.

It can check for continuity of the switches by sounding the buzzer when the multifunction switch is
pressed.

It can check for continuity of harness between multifunction switch and rear control switch (audio), or
steering switch (audio).

NOTE:
When it check continuity of harness between multifunction switch and rear control switch (audio), rear
control cancel switch is OFF position.

STARTING THE SELF-DIAGNOSIS MODE

1.

Turn ignition switch from OFF to ACC.

2.

 Within 10 seconds, press and hold the function switches “1” and
“6 ”simultaneously for 5 seconds or more, when the buzzer
sounds at once.

3.

Release the function switches, when the buzzer sounds. And
self-diagnosis mode is started. 

EXITING THE SELF-DIAGNOSIS MODE

Turn ignition switch OFF, or press and hold the function switches “1” and “6” simultaneously for 5 seconds.
Then the self-diagnosis ends.

PKIA9679E

Data monitor item

Condition

Remarks

VHCL SPD SIG

ON

Vehicle speed > 0 km/h (0 MPH)

Changes in indication may be delayed by 
approx. 1.5 seconds. This is normal.

OFF

Vehicle speed = 0 km/h (0 MPH)

Ignition switch in ACC position

MTR ILL DIM

ON

Lighting switch ON

OFF

Lighting switch OFF

IGN SW

ON

Ignition switch ON

OFF

Ignition switch ACC or OFF

PKIB0257E

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

DI-137

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Power Supply and Ground Circuit Inspection for AV Control Unit

NKS001CS

1. 

CHECK FUSE

Check for blown AV control unit fuses.

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

Check voltage between AV control unit harness connector M78 ter-
minals 2, 3, 6 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness between AV control unit and fuse.

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect AV control unit connector. 

3.

Check continuity between AV control unit harness connector
M78 terminals 1, 4 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Check ground harness.

Power Supply and Ground Circuit Inspection for Display

NKS001CT

1. 

CHECK FUSE

Check for blown display fuses.

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"

 .

Unit

Power source

Fuse No.

AV control unit

Battery

52

Ignition switch ACC or ON

21

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

Connector

Terminal

M78

2

Ground

Battery voltage

Battery voltage

3

Battery voltage

Battery voltage

6

0 V

Battery voltage

PKIA9685E

1 – Ground

: Continuity should exist.

4 – Ground

PKIA9686E

Unit

Power souse

Fuse No.

Display

Battery

 52

Ignition switch ACC or ON

 21

DI-138

VEHICLE INFORMATION AND INTEGRATED SWITCH SYSTEM /WITHOUT 

NAVIGATION SYSTEM

2. 

CHECK POWER SUPPLY CIRCUIT

Check voltage between display harness connector M82 terminals
19, 21, 23 and ground.

OK or NG

OK

>> GO TO 3.

NG

>> Check harness between display and fuse.

3. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect display connector. 

3.

Check continuity between display harness connector M82 termi-
nals 22, 24 and ground.

OK or NG

OK

>> INSPECTION END

NG

>> Check ground harness.

Power Supply and Ground Circuit Inspection for Multifunction Switch

NKS001CU

1. 

CHECK POWER SUPPLY CIRCUIT

Check voltage between multifunction switch harness connector M83
terminal 1 and ground.

OK or NG

OK

>> GO TO 2.

NG

>> Check harness between multifunction switch and fuse.

2. 

CHECK GROUND CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect multifunction switch connector.

3.

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

OK or NG

OK

>> INSPECTION END

NG

>> Check ground harness.

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

Connector

Terminal

M82

19

Ground

0 V

Battery voltage

21

Battery voltage

Battery voltage

23

Battery voltage

Battery voltage

PKIA9687E

22 – Ground

: Continuity should exist.

24 – Ground

PKIA9688E

Terminals

Ignition switch position

(+)

(–)

OFF

ACC

Connector

Terminal

M83

1

Ground

0 V

Battery voltage

PKIA9689E

2 – Ground

: Continuity should exist.

PKIA9690E

 

 

 

 

 

 

 

Content   ..  315  316  317  318   ..