Nissan Maxima. Manual — part 140
AV-380
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
U1232 STEERING ANGLE SENSOR
U1232 STEERING ANGLE SENSOR
DTC Logic
INFOID:0000000009471329
Diagnosis Procedure
INFOID:0000000009471330
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
BRC-6, "ADJUSTMENT OF STEERING ANGLE SENSOR NEUTRAL POSITION :
.
DTC
Display contents of
CONSULT
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 DISPLAY UNIT
AV-381
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
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U1243 DISPLAY UNIT
Description
INFOID:0000000009471331
DTC Logic
INFOID:0000000009471332
Diagnosis Procedure
INFOID:0000000009471333
Regarding Wiring Diagram information, refer to
AV-449, "Wiring Diagram - With BOSE Audio system Without
1.
CHECK DISPLAY UNIT POWER SUPPLY AND GROUND CIRCUIT
Check display unit power supply and ground circuit. Refer to
AV-389, "DISPLAY UNIT : Diagnosis Procedure"
.
Is inspection result OK?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK CONTINUITY OF COMMUNICATION CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect display unit connector and AV control unit connector.
3. Check continuity between display unit harness connector M141
(A) terminals 11, 22 and AV control unit harness connector
M154 (B) terminals 56, 44.
4. Check continuity between display unit harness connector M141
(A) terminals 11, 22 and ground.
Are continuity results as specified?
Part name
Description
DISPLAY UNIT
• Display image is controlled by the serial communication from AV control unit.
• Inputs the RGB image signal (RGB, RGB area and RGB synchronizing) from
AV control unit and the auxiliary image signal from the auxiliary input jacks.
• Outputs the synchronizing signals (HP and VP) to the AV control unit.
DTC
Display contents of
CONSULT
DTC Detection Condition
Possible causes
U1243
FRONT DISP CONN
[U1243]
• Display unit power supply and ground circuit malfunc-
tion is detected.
• Malfunction is detected on communication circuit be-
tween display unit and AV control unit.
• Malfunction is detected on communication signal be-
tween display unit and AV control unit.
• Display unit power supply and
ground circuit.
• Communication circuit between
display unit and AV control unit.
A
B
Continuity
Connector
Terminal
Connector
Terminal
M141
11
M154
56
Yes
22
44
A
—
Continuity
Connector
Terminal
M141
11
Ground
No
22
ALNIA0310GB
AV-382
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
U1243 DISPLAY UNIT
YES
>> GO TO 3.
NO
>> Repair harness or connector.
3.
CHECK COMMUNICATION SIGNAL
1. Connect display unit connector and AV control unit connector.
2. Turn ignition switch ON.
3. Check signal between display unit harness connector M141 ter-
minal 11 and ground with an oscilloscope or CONSULT.
Are voltage readings as specified?
YES
>> GO TO 4.
NO
>> Replace AV control unit. Refer to
AV-481, "Removal and Installation"
.
4.
CHECK COMMUNICATION SIGNAL
Check signal between display unit harness connector M141 terminal
22 and ground with an oscilloscope or CONSULT.
Are voltage readings as specified?
YES
>> Inspection End.
NO
>> Replace display unit. Refer to
AV-484, "Removal and Installation"
.
(+)
(-)
Reference signal
Connector
Terminal
M141
11
Ground
ALNIA0311GB
PKIB5039J
(+)
(-)
Reference signal
Connector
Terminal
M141
22
Ground
ALNIA0312GB
PKIB5039J
AV
U1263 USB
AV-383
< DTC/CIRCUIT DIAGNOSIS >
[COLOR DISPLAY - W/ BOSE]
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U1263 USB
DTC Logic
INFOID:0000000009471334
Diagnosis Procedure
INFOID:0000000009471335
1.
CHECK USB HARNESS
Visually check USB harness.
Is the inspection result normal?
YES
>> Replace AV control unit. Refer to
AV-481, "Removal and Installation"
.
NO
>> Replace USB harness.
DTC
Display contents of
CONSULT
DTC detection condition
Possible malfunction factor
U1263
USB OVERCURRENT
[U1263]
Detection of over current in USB interface.
Check USB harness between the AV
control unit and USB interface.
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