Nissan Pathfinder. Manual — part 117
AV
U1231 BOSE AMP.
AV-295
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITH BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1231 BOSE AMP.
DTC Logic
INFOID:0000000009174572
CONSULT Display
DTC Detection Condition
Possible Cause
AMP TEMP
[U1231]
BOSE speaker amp. malfunction is detected.
Replace BOSE speaker amp. if malfunction oc-
curs constantly.
Refer to
AV-296
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITH BOSE]
U1243 DISPLAY UNIT
U1243 DISPLAY UNIT
DTC Logic
INFOID:0000000009174573
Diagnosis Procedure
INFOID:0000000009174574
Regarding Wiring Diagram information, refer to
.
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuits. Refer to
AV-305, "DISPLAY UNIT : Diagnosis Proce-
.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness or connectors.
2.
CHECK COMMUNICATION CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect display unit connector and AV control unit connector M45.
3. Check continuity between display unit connector M93 terminals 11, 22 and AV control unit connector M45
terminals 73, 61.
4. Check continuity between display unit connector M93 terminals 11, 22 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK COMMUNICATION SIGNAL (DISP
→CONT)
1. Connect display unit connector and AV control unit connector M45.
2. Turn ignition switch ON.
3. Check signal between display unit connector M93 terminal 11 and ground.
CONSULT Display
DTC Detection Condition
Possible Cause
FRONT DISP CONN
[U1243]
When any of the following is detected:
• display unit power supply or ground circuit mal-
function.
• serial communication circuit malfunction be-
tween display unit and AV control unit.
• Display unit power supply and ground circuits.
• Serial communication circuits between display
unit and AV control unit.
Display unit
AV control unit
Continuity
Connector
Terminal
Connector
Terminal
M93
11
M45
73
Yes
22
61
Display unit
Ground
Continuity
Connector
Terminal
M93
11
—
No
12
AV
U1243 DISPLAY UNIT
AV-297
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITH BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
Is the inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-365, "Removal and Installation"
.
4.
CHECK COMMUNICATION SIGNAL (CONT
→DISP)
Check signal between display unit connector M93 terminal 22 and ground.
Is the inspection result normal?
YES
>> Inspection End.
NO
>> Replace display unit. Refer to
AV-369, "Removal and Installation"
Display unit
Ground
Condition
Reference value
(+)
(
−)
Connector
Terminal
M93
11
—
When adjusting dis-
play brightness.
PKIB5039J
Display unit
Ground
Condition
Reference value
(+)
(
−)
Connector
Terminal
M93
22
—
When adjusting dis-
play brightness.
PKIB5039J
AV-298
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITH BOSE]
U1255 SATELLITE RADIO TUNER
U1255 SATELLITE RADIO TUNER
DTC Logic
INFOID:0000000009174575
Diagnosis Procedure
INFOID:0000000009174576
Regarding Wiring Diagram information, refer to
.
1.
CHECK SATELLITE RADIO TUNER POWER SUPPLY AND GROUND CIRCUIT
Check satellite radio tuner power supply and ground circuit. Refer to
AV-308, "SATELLITE RADIO TUNER :
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair or replace harness or connectors.
2.
CHECK COMMUNICATION CIRCUIT AND REQUEST SIGNAL CIRCUIT CONTINUITY
1. Turn ignition switch OFF.
2. Disconnect AV control unit connector M51 and satellite radio tuner connector B2.
3. Check continuity between AV control unit connector M51 terminals 100, 101, 102 and satellite radio tuner
connector B2 terminals 28, 29, 30.
4. Check continuity between AV control unit connector M51 terminals 100, 101, 102 and ground.
Is the inspection result normal?
YES
>> GO TO 3.
NO
>> Repair or replace harness or connectors.
3.
CHECK AV CONTROL UNIT VOLTAGE
1. Connect AV control unit connector M51.
2. Turn ignition switch ON.
3. Check voltage between AV control unit connector M51 terminals 100, 101 and ground.
CONSULT Display
DTC Detection Condition
Possible Cause
SAT CONN
[U1255]
When any of the following is detected:
• satellite radio tuner power supply or ground circuit
malfunction.
• communication circuit malfunction between AV
control unit and satellite radio tuner.
• request signal circuit malfunction between AV
control unit and satellite radio tuner.
• Satellite radio tuner power supply and ground cir-
cuits.
• Communication circuits between AV control unit
and satellite radio tuner.
• Request signal circuits between AV control unit
and satellite radio tuner.
AV control unit
Satellite radio tuner
Continuity
Connector
Terminal
Connector
Terminal
M51
100
B2
28
Yes
101
29
102
30
AV control unit
Ground
Continuity
Connector
Terminal
M51
100
No
101
102
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