Nissan Frontier. Manual - part 77

AV-300

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

U12AE AV CONTROL UNIT

U12AE AV CONTROL UNIT

DTC Logic

INFOID:0000000009482224

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

Internal Amplifier temperature 
Warning
[U12AE]

Internal amplifier temperature has exceeded 
maximum temperature.

Replace AV control unit if malfunction occurs 
constantly.
Refer to 

AV-348, "Removal and Installation"

.

AV

U12AF AV CONTROL UNIT

AV-301

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

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U12AF AV CONTROL UNIT

DTC Logic

INFOID:0000000009482225

DTC DETECTION LOGIC

CONSULT Display

DTC Detection Condition

Possible Cause

CD Mechanism Temperature 
Warning
[U12AF]

CD drive temperature has exceeded maximum 
temperature. CD drive is switched OFF to avoid 
irreversible damage.

Replace AV control unit if malfunction occurs 
constantly.
Refer to 

AV-348, "Removal and Installation"

.

AV-302

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

U12B0 POWER SUPPLY VOLTAGE

U12B0 POWER SUPPLY VOLTAGE

DTC Logic

INFOID:0000000009482226

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009482227

1.

CHECK CHARGING SYSTEM

Check the vehicle charging system. Refer to 

CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or 

CHG-

5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

.

Is the inspection result normal?

YES

>> GO TO 2.

NO

>> Repair or replace the malfunctioning components.

2.

CHECK AV CONTROL UNIT POWER SUPPLY AND GROUND CIRCUITS

Perform the AV control unit power supply and ground circuit diagnosis procedure. Refer to 

AV-305, "AV CON-

TROL UNIT : Diagnosis Procedure"

.

Is the inspection result normal?

YES

>> Replace the AV control unit. Refer to 

AV-348, "Removal and Installation"

.

NO

>> Repair or replace harness or connectors.

CONSULT Display

DTC Detection Condition

Possible Cause

Supply Voltage Goes below 9V 
> 20s
[U12B0]

AV control unit supply voltage exceeds lower lim-
its.

• Charging system malfunction.
• AV control unit power supply or ground circuits.

AV

U12B1 POWER SUPPLY VOLTAGE

AV-303

< DTC/CIRCUIT DIAGNOSIS >

[NAVIGATION]

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U12B1 POWER SUPPLY VOLTAGE

DTC Logic

INFOID:0000000009482228

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009482229

1.

CHECK CHARGING SYSTEM

Check the vehicle charging system. Refer to 

CHG-2, "Work Flow (With EXP-800 NI or GR8-1200 NI)"

 or 

CHG-

5, "Work Flow (Without EXP-800 NI or GR8-1200 NI)"

.

Is the inspection result normal?

YES

>> Replace the AV control unit. Refer to 

AV-348, "Removal and Installation"

.

NO

>> Repair or replace the malfunctioning components.

CONSULT Display

DTC Detection Condition

Possible Cause

Supply Voltage Goes High > 
16V for 20s
[U12B1]

AV control unit supply voltage exceeds upper lim-
its.

Charging system malfunction.