Nissan Altima HL32 Hybrid. Instruction - part 776

LAN-58

< BASIC INSPECTION >

[HEV SYSTEM CAN]

DIAGNOSIS AND REPAIR WORKFLOW

Reception item of “ABS”: “U0073”, “U0123” and “U0124” are not indicated. ABS communicates normally

with YAW. Put a check mark on the normal circuit between ABS and YAW (check mark 2-b in the figure

below).

3. Through the above procedure, the error is detected in between EPS and DLC main line (shaded in the fig-

ure below).

NOTE:

For abbreviations, refer to 

LAN-50, "Abbreviation List"

.

4. Perform the inspection for the detected error circuit. For the inspection procedure, refer to 

LAN-68, "Main

Line"

. (When the error is detected on branch line, refer to 

LAN-68, "Branch Line"

.)

JPMIA0256GB

JPMIA0257GB

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-59

< BASIC INSPECTION >

[HEV SYSTEM CAN]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Diagnosis Sheet

INFOID:0000000004219060

DTC Related to HEV SYSTEM CAN List

INFOID:0000000004219061

JPMIA0258GB

LAN-60

< BASIC INSPECTION >

[HEV SYSTEM CAN]

DIAGNOSIS AND REPAIR WORKFLOW

Unit

DTC (INF 

code)

Diagnos-

tic unit

Self-diagno-

sis item

(CONSULT-III 

indication)

DTC detection logic

Possible cause

Hybrid vehicle 
control ECU

• P0A1D (924)
• P0A1D (925)

—

HV ECU

Hybrid vehicle control ECU malfunc-
tions.

Hybrid vehicle control ECU

• U0100 (211)
• U0100 (530)

ECM

LOST COMM 
[ECM]

CAN communication signal is not 
transmitted or received between ECM 
and hybrid vehicle control ECU for 1 
second or more.

• HEV SYSTEM CAN com-

munication line between 
ECM and hybrid vehicle 
control ECU

• HEV SYSTEM CAN com-

munication line short

U0100 (212)

ECM

LOST COMM 
[ECM]

Malfunction signal of CAN communi-
cation line between ECM and hybrid 
vehicle control ECU is received.

• HEV SYSTEM CAN com-

munication line between 
ECM and hybrid vehicle 
control ECU

• HEV SYSTEM CAN com-

munication line short

• U0129 (220)
• U0129 (528)

ABS

LOST COMM 
[BRAKE]

CAN communication signal is not 
transmitted or received between 
brake ECU and hybrid vehicle control 
ECU for 2 seconds or more.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and hybrid ve-
hicle control ECU

• HEV SYSTEM CAN com-

munication line short

U0129 (222)

ABS

LOST COMM 
[BRAKE]

Malfunction signal of CAN communi-
cation line between brake ECU and 
hybrid vehicle control ECU is re-
ceived.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and hybrid ve-
hicle control ECU

• HEV SYSTEM CAN com-

munication line short

• U0131 (433)
• U0131 (434)

EPS

LOST COMM 
[EPS]

CAN communication signal is not re-
ceived between EPS control unit and 
hybrid vehicle control ECU for 1 sec-
ond or more.

• HEV SYSTEM CAN com-

munication line between 
EPS control unit and hy-
brid vehicle control ECU

• HEV SYSTEM CAN com-

munication line short

LAN

DIAGNOSIS AND REPAIR WORKFLOW

LAN-61

< BASIC INSPECTION >

[HEV SYSTEM CAN]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

Brake ECU

C1300

—

ECU

Brake ECU malfunctions.

Brake ECU

U0073

• YAW
• STRG

LOST COMM 
YAW/STRG

• CAN communication is stopped for 

more than 1 second.

• The following phenomenon occur 

more than 10 times in 60 seconds.

- CAN communication with yaw rate/

side/decel G sensor or steering an-
gle sensor is suspended more than 
1 time per 5 seconds.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and yaw rate/
side/decel G sensor, 
steering angle sensor

• HEV SYSTEM CAN com-

munication line short

U0123

• YAW
• HV ECU

LOST COMM 
[YAW]

• CAN communication signal is not 

received between yaw rate/side/de-
cel G sensor and brake ECU for 1 
second or more.

• The following phenomenon occur 

more than 10 times in 60 seconds.

- CAN communication with hybrid ve-

hicle control ECU is suspended 
more than 1 time per 5 seconds.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and yaw rate/
side/decel G sensor, hy-
brid vehicle control ECU

• HEV SYSTEM CAN com-

munication line short

U0124

• YAW
• HV ECU

LOST COMM 
[DECEL]

U0126

• STRG
• HV ECU

LOST COMM 
[STRG]

• CAN communication signal is not 

received between steering angle 
sensor and brake ECU for 1 second 
or more.

• The following phenomenon occur 

more than 10 times in 60 seconds.

- CAN communication with hybrid ve-

hicle control ECU is suspended 
more than 1 time per 5 seconds.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and steering 
angle sensor, hybrid vehi-
cle control ECU

• HEV SYSTEM CAN com-

munication line short

U0293

HV ECU

LOST COMM 
[HV ECU]

• CAN communication signal is not 

received between hybrid vehicle 
control ECU and brake ECU for 2 
seconds or more.

• CAN communication signal from 

hybrid vehicle control ECU has er-
ror.

• The following phenomenon occur 

more than 10 times in 60 seconds.

- CAN communication with hybrid ve-

hicle control ECU is suspended 
more than 1 time per 5 seconds.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and hybrid ve-
hicle control ECU

• HEV SYSTEM CAN com-

munication line short

EPS control 
unit

C1608

—

CONTROL 
UNIT

EPS control unit malfunctions.

EPS control unit

CAUTION:

Before replace EPS con-
trol unit, inspect EPS con-
trol unit. Refer to 

BRC-5, 

"Work Flow"

.

U0129

ABS

LOST COMM 
[BRAKE]

CAN communication signal is not re-
ceived between brake ECU and EPS 
control unit for 2 seconds or more.

• HEV SYSTEM CAN com-

munication line between 
brake ECU and EPS con-
trol unit

• HEV SYSTEM CAN com-

munication line short

U0293

HV ECU

LOST COMM 
[HV ECU]

CAN communication signal is not re-
ceived between hybrid vehicle control 
ECU and EPS control unit for 2 sec-
onds or more.

• HEV SYSTEM CAN com-

munication line between 
hybrid vehicle control 
ECU and EPS control unit

• HEV SYSTEM CAN com-

munication line short

Unit

DTC (INF 

code)

Diagnos-

tic unit

Self-diagno-

sis item

(CONSULT-III 

indication)

DTC detection logic

Possible cause