Nissan Leaf. Manual — part 149
AV
U1A05 TCU
AV-587
< DTC/CIRCUIT DIAGNOSIS >
[TELEMATICS SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1A05 TCU
DTC Logic
INFOID:0000000010122761
Diagnosis Procedure
INFOID:0000000010122762
Regarding Wiring Diagram information, refer to
(NAVIGATION WITHOUT BOSE) or
(NAVIGATION WITH BOSE).
1.
CHECK USB HARNESS CONTINUITY
1. Turn the power switch OFF.
2. Disconnect TCU and AV control unit connectors.
3. Check the continuity between TCU harness connector and AV control unit harness connector.
4. Check the continuity between TCU harness connector and ground.
Is the check result normal?
YES
>> Replace TCU. Refer to
AV-594, "Removal and Installation"
.
NO
>> Repair or replace the harness or connectors.
DTC
Display contents of CON-
SULT
DTC detection condition
Action to take
U1A05
USB COMM
[U1A05]
It is detected for malfunction of the USB communication
module (communication disabled) between TCU and AV
control unit.
• Check the USB harness con-
nection and erase DTC.
• Replace TCU if the malfunction
constantly occurs.
Refer to
.
TCU
AV control unit
Continuity
Connector
Terminal
Connector
Terminal
M68
47
M97 (without Bose)
M104 (with Bose)
62
Yes
48
61
55
70
56
69
TCU
Ground
Continuity
Connector
Terminal
M68
47
No
48
56
AV-588
< DTC/CIRCUIT DIAGNOSIS >
[TELEMATICS SYSTEM]
U1A07 TEL ANTENNA
U1A07 TEL ANTENNA
DTC Logic
INFOID:0000000010122763
Diagnosis Procedure
INFOID:0000000010122764
Regarding Wiring Diagram information, refer to
(NAVIGATION WITHOUT BOSE) or
(NAVIGATION WITH BOSE).
1.
HARNESS INSPECTION
1. Turn the power switch OFF.
2. Disconnect the TEL antenna feeder connector of TCU.
3. Check the continuity between TEL antenna-side harness connector.
Is the check result normal?
YES
>> Replace TCU. Refer to
AV-594, "Removal and Installation"
.
NO
>> Replace the TEL antenna. Refer to
AV-597, "Removal and Installation"
.
DTC
Display contents of CON-
SULT
DTC detection condition
Action to take
U1A07
TEL ANTENNA SHORT
[U1A07]
TEL antenna was short-circuited.
• Check the TEL antenna har-
ness connection and the har-
ness condition, and erase
DTC.
• If poor harness condition or the
malfunction constantly occurs,
replace the TEL antenna.
Refer to
TEL antenna
Continuity
Connector
Terminal
M113
58
59
No
AV
U1A08 TEL ANTENNA
AV-589
< DTC/CIRCUIT DIAGNOSIS >
[TELEMATICS SYSTEM]
C
D
E
F
G
H
I
J
K
L
M
B
A
O
P
U1A08 TEL ANTENNA
DTC Logic
INFOID:0000000010122765
Diagnosis Procedure
INFOID:0000000010122766
Regarding Wiring Diagram information, refer to
(NAVIGATION WITHOUT BOSE) or
(NAVIGATION WITH BOSE).
1.
CHECK OF TEL ANTENNA
1. Turn the power switch OFF.
2. Disconnect the TEL antenna feeder connector.
3. Visually check TEL antenna and antenna feeder.
Is the inspection result normal?
YES
>> GO TO 2.
NO
>> Repair malfunctioning parts.
2.
CHECK AV CONTROL UNIT VOLTAGE
1. Disconnect TEL antenna connector.
2. Turn power switch ON.
3. Check voltage between TCU and ground.
Is the inspection result normal?
YES
>> Replace TEL antenna. Refer to
AV-597, "Removal and Installation"
NO
>> Replace TCU. Refer to
AV-594, "Removal and Installation"
.
DTC
Display contents of CON-
SULT
DTC detection condition
Action to take
U1A08
TEL ANTENNA NO CONN
[U1A08]
TEL ANTENNA NO CONN
• Check the harness connec-
tion and erase DTC.
• Replace TCU if the malfunc-
tion constantly occurs. Re-
fer to
(+)
(
−)
Reference value
TCU
Terminal
Connector
M113
58
Ground
2.8 V
AV-590
< DTC/CIRCUIT DIAGNOSIS >
[TELEMATICS SYSTEM]
POWER SUPPLY AND GROUND CIRCUIT
POWER SUPPLY AND GROUND CIRCUIT
TCU
TCU : Diagnosis Procedure
INFOID:0000000010122767
Regarding Wiring Diagram information, refer to
(NAVIGATION WITHOUT BOSE) or
(NAVIGATION WITH BOSE).
1.
CHECK FUSE
Check if the fuse is blown.
Is the check result normal?
YES
>> GO TO 2.
NO
>> Replace the blown fuse after repairing the affected circuit.
2.
CHECK TCU VOLTAGE CIRCUITS
Check the voltage between the TCU harness connector and ground.
Is the check result normal?
YES
>> GO TO 3.
NO
>> Repair or replace the harness or connectors.
3.
CHECK TCU GROUND CIRCUIT
1. Turn the power switch OFF.
2. Disconnect the TCU connector.
3. Check the continuity between TCU harness connector and ground.
Is the check result normal?
YES
>> Inspection End.
NO
>> Repair or replace the harness or connectors.
Power supply
Fuse No.
BAT
34
Power switch ACC or ON
19
Power switch ON
3
Signal
TCU
Terminal
Test condition
Standard
Reference value
Connector
(+)
(-)
Power switch
BAT
M67
1
2
OFF
9 – 16 V
Battery Voltage
ACC
3
ACC
9 – 16 V
12 V
ON
4
ON
9 – 16 V
12 V
Signal
Connector
Terminal
Power switch
Continuity
Ground
M67
2
OFF
Yes
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