Nissan Altima L32. Manual - part 1321

SEC-434

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U1010 CONTROL UNIT (CAN)

U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000004499074

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000004499075

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

B2013 ID DISCORD, IMMU-STRG

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B2013 ID DISCORD, IMMU-STRG

Description

INFOID:0000000004499076

BCM performs the ID verification with the steering lock unit and releases the steering lock if both BCM and

steering lock unit ID are same. BCM starts the communication with the steering lock unit when keyfob is car-

ried into the passenger compartment and the push-button ignition switch is pressed.

DTC Logic

INFOID:0000000004499077

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Lock steering.

2. Press the push-button ignition switch.

3. Check “Self Diagnostic Result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-435, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004499078

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT-III. Re-register all keyfobs.

For initialization and registration of keyfob, refer to “CONSULT-III Operation Manual”.
Can the system be initialized and can steering lock be released with re-registered keyfob?

YES

>> Steering lock unit was unregistered.

NO

>> Replace steering wheel lock unit.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2013

ID DISCORD, IMMU-
STRG

The ID verification results between BCM and steer-
ing control unit are NG. The registration is neces-
sary.

• Steering wheel lock unit

SEC-436

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B2014 CHAIN OF STRG-IMMU

B2014 CHAIN OF STRG-IMMU

Description

INFOID:0000000004499079

BCM performs the ID verification with the steering lock unit to release the steering. BCM starts the communi-

cation with the steering lock unit when keyfob is carried into the passenger compartment and the push-button

ignition switch is pressed.

DTC Logic

INFOID:0000000004499080

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Lock steering.

2. Press the push-button ignition switch.

3. Check “Self Diagnostic Result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to 

SEC-436, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004499081

1.

CHECK STEERING LOCK UNIT POWER SUPPLY

1. Turn ignition switch OFF.

2. Disconnect steering lock unit harness connector.

3. Check voltage between steering lock unit harness connector

and ground while turning ignition switch from OFF to ACC.

Is the inspection result normal?

YES

>> GO TO 3

NO

>> GO TO 2

2.

CHECK STEERING LOCK UNIT POWER SUPPLY CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2014

CHAIN OF STRG-
IMMU

Inactive communication between steering 
control unit and BCM

• Harness or connectors

(steering lock unit circuit is open or short-
ed)

• Steering lock unit
• BCM

Steering lock unit

Ground

Ignition switch 

position

Voltage [V]

Connector

Terminal

M32

7

Ground

OFF 

→ ACC

Battery volt-

age

OFF or ON

0

ALKIA1348ZZ

B2014 CHAIN OF STRG-IMMU

SEC-437

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3. Check continuity between steering lock unit harness connector

M32 (A) terminal 7 and BCM harness connector M19 (B) termi-

nal 94.

4. Check continuity between steering lock unit harness connector

M32 (A) terminal 7 and ground.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> Repair harness or connector.

3.

CHECK STEERING LOCK UNIT GROUND CIRCUIT

1. Turn ignition switch OFF.

2. Check continuity between steering lock unit and ground.

Is the inspection result normal?

YES

>> GO TO 4

NO

>> Repair harness or connector.

4.

CHECK STEERING LOCK UNIT COMMUNICATION SIGNAL

1. Connect steering lock unit harness connector.

2. Using an oscilloscope, read voltage signal between steering

lock unit harness connector and ground.

Steering lock unit

BCM

Continuity

Connector

Terminal

connector

Terminal

A: M32

7

B: M19

94

Yes

Steering lock unit

Ground

Continuity

Connector

Terminal

A: M32

7

Ground

No

ALKIA0433ZZ

Steering lock unit

Ground

Continuity

Connector

Terminal

M32

5

Ground

Yes

6

ALKIA1641ZZ

ALKIA0435ZZ