Infiniti QX56 (Z62). Manual — part 72
AV-142
< DTC/CIRCUIT DIAGNOSIS >
U1232 STEERING ANGLE SENSOR
U1232 STEERING ANGLE SENSOR
DTC Logic
INFOID:0000000006216291
Diagnosis Procedure
INFOID:0000000006216292
1.
ADJUST THE PREDICTIVE COURSE LINE CENTER POSITION OF THE STEERING ANGLE SENSOR
When U1232 is detected, adjust the predictive course line center position of the steering angle sensor.
>> Adjusts the steering angle sensor neutral position on ABS actuator and electrical unit (control unit)
side. Refer to
DTC
Display contents of
CONSULT-III
DTC detection condition
Possible malfunction factor
U1232
ST ANGLE SEN CALIB
[1232]
Predictive course line center position adjustment of the
steering angle sensor is incomplete.
Adjust the predictive course line cen-
ter position of the steering angle sen-
sor.
AV
U1243 FRONT DISPLAY UNIT
AV-143
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1243 FRONT DISPLAY UNIT
DTC Logic
INFOID:0000000006216293
Diagnosis Procedure
INFOID:0000000006216294
1.
CHECK FRONT DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUITS
Check front display unit power supply and ground circuits. Refer to
AV-161, "FRONT DISPLAY UNIT : Diagno-
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY COMMUNICATION CIRCUITS
1.
Turn ignition switch OFF.
2.
Disconnect front display unit connector and AV control unit connector.
3.
Check continuity between front display unit harness connector and AV control unit harness connector.
4.
Check continuity between front display unit harness connector and ground.
Is inspection result normal?
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK COMMUNICATION SIGNAL
1.
Connect front display unit connector and AV control unit connector.
2.
Turn ignition switch ON.
3.
Check signal between front display unit harness connector and ground.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1243
FRONT DISP CONN
[U1243]
When either one of the following items is detected.
• front display unit power supply and ground circuits are
malfunctioning.
• serial communication circuits between front display unit
and AV control unit are malfunctioning.
• Front display unit power supply and
ground circuits.
• Serial communication circuits be-
tween front display unit and AV
control unit.
Front display unit
AV control unit
Continuity
Connector
Terminals
Connector
Terminals
M215
9
M210
89
Existed
10
73
Front display unit
Ground
Continuity
Connector
Terminals
M215
9
Not existed
10
AV-144
< DTC/CIRCUIT DIAGNOSIS >
U1243 FRONT DISPLAY UNIT
Is inspection result normal?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-212, "Removal and Installation"
.
4.
CHECK COMMUNICATION SIGNAL
Check signal between front display unit harness connector and ground.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace front display unit. Refer to
AV-213, "Removal and Installation"
.
(+)
(
−
)
Condition
Reference value
Front display unit
Connector
Terminal
M215
9
Ground
When adjusting display bright-
ness.
PKIB5039J
(+)
(
−
)
Condition
Reference value
Front display unit
Connector
Terminal
M215
10
Ground
When adjusting display bright-
ness.
PKIB5039J
AV
U1244 GPS ANTENNA
AV-145
< DTC/CIRCUIT DIAGNOSIS >
C
D
E
F
G
H
I
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K
L
M
B
A
O
P
U1244 GPS ANTENNA
DTC Logic
INFOID:0000000006216295
Diagnosis Procedure
INFOID:0000000006216296
1.
GPS ANTENNA CHECK
Visually check GPS antenna and antenna feeder.
Is inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK AV CONTROL UNIT VOLTAGE
1.
Disconnect GPS antenna connector.
2.
Turn ignition switch ON.
3.
Check voltage between AV control unit terminal and ground.
Is inspection result normal?
YES
>> INSPECTION END
NO
>> Replace AV control unit. Refer to
AV-212, "Removal and Installation"
.
DTC
Display contents of
CONSULT-III
DTC Detection Condition
Possible causes
U1244
GPS ANTENNA CONN
[U1244]
GPS antenna connection malfunction is detected.
GPS antenna disconnection
(+)
(
−
)
Voltage
(Approx.)
AV control unit
Terminal
153
Ground
5.0 V
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