2008 INFINITI QX56 Factory Service Manual

Page 281 of 4083

INFINITI QX56 2008  Factory Service Manual AV-100
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
AMP ON SIGNAL CIRCUIT
AMP ON SIGNAL CIRCUIT
DescriptionINFOID:0000000001696135
When the audio system is turned on, a voltage signal is supplied from the AV

Page 282 of 4083

INFINITI QX56 2008  Factory Service Manual 
AV
STEERING SWITCHAV-101
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
STEERING SWITCH
DescriptionINFOID:0000000001696137
When one of the steering wheel audio control switches

Page 283 of 4083

INFINITI QX56 2008  Factory Service Manual AV-102
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
STEERING SWITCH
3.SPIRAL CABLE CHECK
1. Disconnect spiral cable connector M102.
2. Check continuity between spiral cable harness connector M30 (A) and M102

Page 284 of 4083

INFINITI QX56 2008  Factory Service Manual AV
MICROPHONE SIGNAL CIRCUITAV-103
< COMPONENT DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
MICROPHONE SIGNAL CIRCUIT
DescriptionINFOID:0000000001696139
Voice signals are transmitted from

Page 285 of 4083

INFINITI QX56 2008  Factory Service Manual AV-104
< COMPONENT DIAGNOSIS >[AUDIO SYSTEM]
MICROPHONE SIGNAL CIRCUIT
Check signal between AV control 
unit harness connector M45 termi-
nals 71 and 72.
Are voltage readings as specified?
YES >> Repl

Page 286 of 4083

INFINITI QX56 2008  Factory Service Manual AV
AV CONTROL UNITAV-105
< ECU DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P
ECU DIAGNOSIS
AV CONTROL UNIT
Reference ValueINFOID:0000000001696141
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III da

Page 287 of 4083

INFINITI QX56 2008  Factory Service Manual AV-106
< ECU DIAGNOSIS >[AUDIO SYSTEM]
AV CONTROL UNIT
4
(L) 5
(B/W) Pre-amp. audio signal rear 
LH
OutputIgnition 
switch  ON Audio output
6
(Y) 15 Steering switch signal A Input Ignition 
switch 
ON

Page 288 of 4083

INFINITI QX56 2008  Factory Service Manual AV
AV CONTROL UNITAV-107
< ECU DIAGNOSIS > [AUDIO SYSTEM]
C
D
E
F
G H
I
J
K L
M B A
O P21
(W) 24 RGB signal (R: red) Output Ignition 
switch  ON Start confirmation/adjust-
ment mode, and then dis-
pla