Infiniti G37 Coupe. Manual — part 76
AV
STEERING SWITCH SIGNAL B CIRCUIT
AV-57
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
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B
A
O
P
STEERING SWITCH SIGNAL B CIRCUIT
Description
INFOID:0000000001559175
Transmits the steering switch signal to AV control unit.
Diagnosis Procedure
INFOID:0000000001559176
1.
CHECK STEERING SWITCH SIGNAL B CIRCUIT
1.
Disconnect AV control unit connector and spiral cable connector.
2.
Check continuity between AV control unit harness connector terminal 16 and spiral cable harness connec-
tor terminal 31.
3.
Check continuity between AV control unit harness connector terminals 16 and ground.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace spiral cable.
3.
CHECK AV CONTROL UNIT VOLTAGE
1.
Connect AV control unit connector and spiral cable connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit harness connector terminals 16 and 15.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK STEERING SWITCH
1.
Turn ignition switch OFF.
2.
Check steering switch. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace steering switch.
Component Inspection
INFOID:0000000001559177
Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.
16 - 31
: Continuity should exist.
16 - Ground
: Continuity should not exist.
16 - 15
: Approx. 3.3 V
AV-58
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
STEERING SWITCH SIGNAL B CIRCUIT
Standard
Between terminals 14 and 17
MENU DOWN switch ON
: 318 – 324
Ω
MENU UP switch ON
: 120 – 122
Ω
SOURCE switch ON
: 0
Ω
Between terminals 15 and 17
VOL UP switch ON
: 120 – 122
Ω
VOL DOWN switch ON
: 0
Ω
JSNIA0215GB
AV
STEERING SWITCH SIGNAL GND CIRCUIT
AV-59
< COMPONENT DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
STEERING SWITCH SIGNAL GND CIRCUIT
Description
INFOID:0000000001559178
Transmits the steering switch signal to AV control unit.
Diagnosis Procedure
INFOID:0000000001559179
1.
CHECK STEERING SWITCH SIGNAL GND CIRCUIT
1.
Disconnect AV control unit connector and spiral cable connector.
2.
Check continuity between AV control unit harness connector terminal 15 and spiral cable harness connec-
tor terminal 33.
3.
Connect AV control unit connector.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair harness or connector.
2.
CHECK SPIRAL CABLE
Check spiral cable.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Replace spiral cable.
3.
CHECK GROUND CIRCUIT
1.
Connect AV control unit connector.
2.
Check continuity between AV control unit harness connector terminal 15 and ground.
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit.
4.
CHECK STEERING SWITCH
1.
Turn ignition switch OFF.
2.
Check steering switch. Refer to
.
Is the inspection result normal?
YES
>> INSPECTION END
NO
>> Replace steering switch.
Component Inspection
INFOID:0000000001559180
Measure the resistance between the steering switch connector terminals 14 to 17 and 15 to 17.
Standard
15 - 33
: Continuity should exist.
15 - Ground
: Continuity should exist.
Between terminals 14 and 17
MENU DOWN switch ON
: 318 – 324
Ω
MENU UP switch ON
: 120 – 122
Ω
SOURCE switch ON
: 0
Ω
Between terminals 15 and 17
VOL UP switch ON
: 120 – 122
Ω
VOL DOWN switch ON
: 0
Ω
JSNIA0215GB
AV-60
< ECU DIAGNOSIS >
[BASE AUDIO WITHOUT NAVIGATION]
AV CONTROL UNIT
ECU DIAGNOSIS
AV CONTROL UNIT
Reference Value
INFOID:0000000001559182
VALUES ON THE DIAGNOSIS TOOL
CONSULT-III MONITOR ITEM
TERMINAL LAYOUT
PHYSICAL VALUES
Display Item
Dis-
play
Vehicle status
Remarks
VHCL SPD SIG
On
Vehicle speed >0 km/h (0 MPH)
Changes in indication may be delayed. This is nor-
mal.
Off
Vehicle speed =0 km/h (0 MPH)
PKB SIG
On
Parking brake is applied.
Changes in indication may be delayed. This is nor-
mal.
Off
Parking brake is released.
ILLUM SIG
On
Light switch ON
—
Off
Light switch OFF
IGN SIG
On
Ignition switch ON
—
Off
Ignition switch in ACC position
REV SIG
On
Shift the selector lever to “R” position
Changes in indication may be delayed. This is nor-
mal.
Off
Shift the selector lever other than “R”
position
JPNIA0012ZZ
Terminal
(Wire color)
Description
Condition
Reference value
(Approx.)
+
–
Signal name
Input/
Output
2
(L)
3
(W)
Sound signal door speaker
LH
Output
Ignition
switch
ON
Voice output
4
(LG)
5
(Y)
Sound signal rear speaker
LH
Output
Ignition
switch
ON
Voice output
SKIB3609E
SKIB3609E
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