Nissan Altima L32. Manual - part 126

BCS-38

< COMPONENT DIAGNOSIS >

[BCM]

U1000 CAN COMM CIRCUIT

COMPONENT DIAGNOSIS

U1000 CAN COMM CIRCUIT

Description

INFOID:0000000004202258

Refer to 

LAN-7, "System Description"

.

DTC Logic

INFOID:0000000004202259

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004202260

1.

 PERFORM SELF DIAGNOSTIC

1. Turn ignition switch ON and wait for 2 second or more.

2. Check “SELF- DIAG RESULTS”.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Refer to 

LAN-8, "CAN Communication Control Circuit"

.

NO

>> Refer to 

GI-42, "Intermittent Incident"

.

CONSULT-III dis-

play description

DTC Detection Condition

Possible cause

CAN COMM CIR-
CUIT
[U1000]

When any listed module cannot communicate CAN com-
munication signal continuously for 2 seconds or more with 
ignition switch ON

In CAN communication system, any item (or items) 
of the following listed below is malfunctioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (IPDM E/R)

BCS

U1010 CONTROL UNIT (CAN)

BCS-39

< COMPONENT DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000004202261

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004202262

1.

 REPLACE BCM

When DTC U1010 is detected, replace BCM.

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

CONSULT-III display 

description

DTC Detection Condition

Possible cause

CAN COMM CIRCUIT
[U1010]

BCM detected internal CAN communication circuit malfunction.

BCM

BCS-40

< COMPONENT DIAGNOSIS >

[BCM]

U0415 VEHICLE SPEED SIG

U0415 VEHICLE SPEED SIG

Description

INFOID:0000000004202263

U0415 is displayed if any unusual condition is present in the reception status of the vehicle speed signal from

the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000004202264

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 DTC CONFIRMATION

1. Erase the DTC.

2. Turn ignition switch OFF.

3. Perform the "SELF-DIAG RESULTS" of CONSULT-III, after the ignition switch has been turned ON for 2

seconds or more.

Is any DTC detected?

YES

>> Refer to 

BCS-91, "DTC Index"

.

NO

>> Inspection End. 

Diagnosis Procedure

INFOID:0000000004202265

1.

 ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAG RESULTS

Perform "SELF-DIAG RESULTS" of ABS actuator and electric unit (control unit) with CONSULT-III. Refer to

BRC-12, "CONSULT-III Function (ABS)"

.

Is any DTC detected?

YES

>> Repair or replace the malfunctioning part.

NO

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when ...

Probable malfunction location

U0415

VEHICLE SPEED SIG
[U0415]

When the vehicle speed signal received from 
the ABS actuator and electric unit (control 
unit) remains abnormal for 2 seconds or more.

• ABS actuator and electric unit (control unit)
• BCM

BCS

B2562 LOW VOLTAGE

BCS-41

< COMPONENT DIAGNOSIS >

[BCM]

C

D

E

F

G

H

I

J

K

L

B

A

O

P

N

B2562 LOW VOLTAGE

DTC Logic

INFOID:0000000004202266

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

 DTC CONFIRMATION

1. Erase DTC.

2. Turn ignition switch OFF.

3. Perform the "SELF-DIAG RESULTS" of CONSULT-III, after the ignition switch has been turned ON for 1.5

seconds or more.

Is any DTC detected?

YES

>> Refer to 

BCS-41, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004202267

1.

 CHECK BATTERY VOLTAGE

Check battery voltage. 
Is battery voltage less than 8.8V?

Yes

>> Charge battery and retest. Refer to 

PG-72, "Work Flow"

.

No

>> GO TO 2

2.

 CHECK POWER SUPPLY CIRCUIT

Check BCM power supply circuit. Refer to 

BCS-42, "Diagnosis Procedure"

.

Is the circuit OK?

Yes

>> Replace BCM. Refer to 

BCS-96, "Removal and Installation"

.

No

>> Repair or replace the malfunctioning part.

Special Repair Requirement

INFOID:0000000004202268

1.

 REQUIRED WORK WHEN REPLACING BCM

Initialize control unit. Refer to 

BCS-6, "CONFIGURATION (BCM) : Special Repair Requirement"

.

>> Work End.

DTC

Display contents of 

CONSULT-III

Diagnostic item is detected when ...

Possible cause

B2562

LOW VOLTAGE

When the power supply voltage to BCM remains less 
than 8.8 V for 1.5 seconds or more

Harness or connector (power supply 
circuit)