Nissan Leaf. Manual - part 148

AV

U1A01 TCU

AV-583

< DTC/CIRCUIT DIAGNOSIS >

[TELEMATICS SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1A01 TCU

DTC Logic

INFOID:0000000010122757

DTC

Display contents of CON-

SULT

DTC detection condition

Action to take

U1A01

INTERNAL ERROR (TCU)
[U1A01]

Malfunction in TCU is detected.

• Check the connector wiring 

and erase DTC.

• Replace TCU if the malfunc-

tion constantly occurs. Re-
fer to 

AV-594, "Removal and 

Installation"

.

AV-584

< DTC/CIRCUIT DIAGNOSIS >

[TELEMATICS SYSTEM]

U1A02 TCU

U1A02 TCU

DTC Logic

INFOID:0000000010122758

DTC

Display contents of CON-

SULT

DTC detection condition

Action to take

U1A02

TEL COMMUNICATION 
MODULE
[U1A02]

Malfunction on the communication module in TCU is de-
tected.

• Check the harness connec-

tion and erase DTC.

• Replace TCU if the malfunc-

tion constantly occurs. Re-
fer to 

AV-594, "Removal and 

Installation"

.

AV

U1A03 TCU

AV-585

< DTC/CIRCUIT DIAGNOSIS >

[TELEMATICS SYSTEM]

C

D

E

F

G

H

I

J

K

L

M

B

A

O

P

U1A03 TCU

DTC Logic

INFOID:0000000010122759

DTC

Display contents of CON-

SULT

DTC detection condition

Action to take

U1A03

SIM CARD
[U1A03]

SIM card is not inserted or unable to be read.

• Check if there is a contact mal-

function at the SIM card and 
card slot.

• Check the harness connection 

and erase DTC.

• Replace TCU if the malfunction 

constantly occurs. Refer to 

AV-

594, "Removal and Installa-
tion"

.

AV-586

< DTC/CIRCUIT DIAGNOSIS >

[TELEMATICS SYSTEM]

U1A04 TCU

U1A04 TCU

DTC Logic

INFOID:0000000010122760

DTC

Display contents of CON-

SULT

DTC detection condition

Action to take

U1A04

VIN UNFINISHED
[U1A04]

No write of VIN number is detected.

• Write VIN number using CON-

SULT. Refer to 

AV-577, "ADDI-

TIONAL SERVICE WHEN 
REPLACING TCU : Work Pro-
cedure"

.

• Replace TCU if the malfunction 

is detected after VIN number is 
written. Refer to 

AV-594, "Re-

moval and Installation"

.