Nissan Altima L32. Instruction — part 1272

SEC-238

< COMPONENT DIAGNOSIS >

[SEDAN WITH INTELLIGENT KEY]

B2014 CHAIN OF STRG-IMMU

B2014 CHAIN OF STRG-IMMU

Description

INFOID:0000000004206198

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 Intelligent Key is carried into the passenger compartment and the push-

button ignition switch is pressed.

DTC Logic

INFOID:0000000004206199

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-238, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206200

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-239

< COMPONENT DIAGNOSIS >

[SEDAN WITH INTELLIGENT KEY]

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A

B

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P

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

SEC-240

< COMPONENT DIAGNOSIS >

[SEDAN WITH INTELLIGENT KEY]

B2014 CHAIN OF STRG-IMMU

Is the inspection result normal?

YES

>> Replace steering lock unit.

NO

>> GO TO 5

5.

CHECK STEERING LOCK UNIT COMMUNICATION CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM harness connector.

3. Check continuity between BCM harness connector M19 (A) ter-

minal 99 and steering lock unit harness connector M32 (B) ter-

minal 2.

4. Check continuity between BCM harness connector M19 (A) ter-

minal 99 and ground.

Is the inspection normal?

YES

>> GO TO 6

NO

>> Repair harness or connector.

6.

CHECK INTERMITTENT INCIDENT

Refer to

GI-42, "Intermittent Incident"

.

>> Inspection End.

Steering lock unit

Ground

Steering lock unit condi-

tion

Value

Connector

Terminal

M32

2

Ground

Lock

Battery voltage

Lock or unlock

For 15 seconds after un-

lock

Battery voltage

15 seconds or later after

unlock.

0 V

Steering is locked

: Opening the door when ignition switch is ON to OFF.

Steering is unlocked

: Ignition switch is OFF to ACC.

JMKIA0066GB

BCM

Steering lock unit

Continuity

Connector

Terminal

connector

Terminal

A: M19

99

B: M32

2

Yes

BCM

Ground

Continuity

Connector

Terminal

A: M19

99

Ground

No

ALKIA0436ZZ

B2108 STEERING LOCK RELAY

SEC-241

< COMPONENT DIAGNOSIS >

[SEDAN WITH INTELLIGENT KEY]

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B2108 STEERING LOCK RELAY

Description

INFOID:0000000004206285

The steering lock relay ON signal is transmitted to IPDM E/R by BCM via CAN communication.

IPDM E/R turns the steering lock relay ON and transmits the release of the steering to BCM.

DTC Logic

INFOID:0000000004206286

DTC DETECTION LOGIC

NOTE:

• If DTC B2108 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

SEC-235, "DTC Logic"

.

• If DTC B2108 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-236, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Press the push-button ignition switch under the following conditions and wait for at least 1 second.

-

CVT selector lever is in the P position

-

Do not depress the brake pedal.

2. Check “Self diagnostic result” with CONSULT-III.
Is DTC detected?

YES

>> Refer to

SEC-241, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000004206287

1.

CHECK FUSE

1. Turn ignition switch OFF.

2. Check 10A fuse (No. 40, located in IPDM E/R).
Is the inspection result normal?

YES

>> Replace IPDM E/R. Refer to

PCS-48, "Removal and Installation"

.

NO

>> Check the following.

• Harness for open or short between IPDM E/R and battery

• Fuse

DTC No.

Trouble diagnosis

name

DTC detecting condition

Possible cause

B2108

STRG LCK RELAY
ON

IPDM E/R detects that the relay is stuck at ON po-
sition for about 1 second even if the IPDM E/R re-
ceives steering lock relay ON/OFF signal from
BCM.

• IPDM E/R