Nissan Pathfinder. Manual — part 77
AV
U122E AV CONTROL UNIT
AV-135
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U122E AV CONTROL UNIT
DTC Logic
INFOID:0000000009174458
CONSULT Display
DTC Detection Condition
Possible Cause
Built-in AUDIO CONN
[U122E]
AV control unit malfunction is detected.
Replace AV control unit if malfunction occurs con-
stantly.
Refer to
AV-136
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
U1243 DISPLAY UNIT
U1243 DISPLAY UNIT
DTC Logic
INFOID:0000000009174459
Diagnosis Procedure
INFOID:0000000009174460
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-144, "AV CONTROL UNIT : Diagnosis Pro-
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 M136.
3. Check continuity between display unit connector M93 terminals 11, 22 and AV control unit connector
M136 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 M136.
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
M136
73
Yes
22
61
Display unit
Ground
Continuity
Connector
Terminal
M93
11
—
No
22
AV
U1243 DISPLAY UNIT
AV-137
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT 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-187, "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-191, "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-138
< DTC/CIRCUIT DIAGNOSIS >
[MID AUDIO WITHOUT BOSE]
U1255 SATELLITE RADIO TUNER
U1255 SATELLITE RADIO TUNER
DTC Logic
INFOID:0000000009174461
Diagnosis Procedure
INFOID:0000000009174462
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-146, "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 M138 and satellite radio tuner connector B2.
3. Check continuity between AV control unit connector M138 terminals 100, 101, 102 and satellite radio
tuner connector B2 terminals 28, 29, 30.
4. Check continuity between AV control unit connector M138 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 M138.
2. Turn ignition switch ON.
3. Check voltage between AV control unit connector M138 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
M138
100
B2
28
Yes
101
29
102
30
AV control unit
Ground
Continuity
Connector
Terminal
M138
100
No
101
102
Нет комментариевНе стесняйтесь поделиться с нами вашим ценным мнением.
Текст