Nissan Sentra. Manual - part 788

SEC-180

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2190, P1614 NATS ANTENNA AMP.

YES

>> GO TO 4

NO

>> Repair or replace fuse or harness.

4.

CHECK NATS ANTENNA AMP. GROUND LINE CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect NATS antenna amp. connector.

3. Check continuity between NATS antenna amp. connector M42 terminal 3 and ground.

Is the inspection result normal?

YES

>> GO TO 5

NO

>> • Repair or replace harness.

NOTE:

If harness is OK, replace BCM 

BCS-126, "Removal and Installation"

. Perform initialization with

CONSULT. For initialization, refer to CONSULT Immobilizer mode and follow the on-screen

instructions.

5.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 1

1. Connect NATS antenna amp. connector.

2. Turn ignition switch ON.

3. Check voltage between NATS antenna amp. connector M42 terminal 2 and ground with analog tester.

Is the inspection result normal?

YES

>> GO TO 6

NO

>> • Repair or replace harness.

NOTE:

If harness is OK, replace BCM 

BCS-126, "Removal and Installation"

. Perform initialization with

CONSULT. For initialization, refer to CONSULT Immobilizer mode and follow the on-screen

instructions.

6.

CHECK NATS ANTENNA AMP. SIGNAL LINE- 2

Check voltage between NATS antenna amp. connector M42 terminal 4 and ground with analog tester.

Is the inspection result normal?

YES

>> NATS antenna amp. is malfunctioning. Replace NATS antenna amp. Refer to 

SEC-193, "Removal

and Installation"

.

NO

>> • Repair or replace harness.

NOTE:

3 - Ground

: Continuity should exist.

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

2

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

Terminals

Position of ignition key cylinder

Voltage (V)

(Approx.)

( + )

( - )

4

Ground

Before inserting ignition key

Battery voltage

After inserting ignition key

Pointer of tester should move for approx. 30 seconds, 

then return to battery voltage

Just after turning ignition switch 

ON

Pointer of tester should move for approx. 1 second, then 

return to battery voltage

B2190, P1614 NATS ANTENNA AMP.

SEC-181

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

C

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B

SEC

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If harness is OK, replace BCM, refer to 

BCS-126, "Removal and Installation"

. Perform initializa-

tion with CONSULT. For initialization, refer to CONSULT Immobilizer mode and follow the on-

screen instructions.

SEC-182

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2191, P1615 DIFFERENCE OF KEY

B2191, P1615 DIFFERENCE OF KEY

Description

INFOID:0000000009756824

Performs ID verification through BCM when mechanical key is inserted in the ignition key cylinder.

Prohibits the release of steering lock or start of engine when an unregistered ID of mechanical key is used.

DTC Logic

INFOID:0000000009756825

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Insert mechanical key into the key cylinder.

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

YES

>> Refer to 

SEC-182, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756826

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT. Re-register all mechanical keys.

For initialization and registration of mechanical key. Refer to CONSULT Immobilizer mode and follow the on-

screen instructions.
Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> Mechanical key was unregistered.

NO

>> BCM is malfunctioning.

• Replace BCM. Refer to 

BCS-126, "Removal and Installation"

.

• Perform initialization again.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2191

DIFFERENCE OF 
KEY

The ID verification results between BCM and me-
chanical key are NG. The registration is necessary.

Mechanical key 

P1615

B2192, P1611 ID DISCORD, IMMU-ECM

SEC-183

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

C

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G

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B

SEC

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B2192, P1611 ID DISCORD, IMMU-ECM

Description

INFOID:0000000009756827

BCM performs the ID verification with ECM that allows the engine to start. BCM starts the communication with

ECM if ignition switch is turned ON and starts the engine if the ID is OK. ECM prevents the engine from start-

ing if the ID is not registered.

DTC Logic

INFOID:0000000009756828

DTC DETECTION LOGIC

NOTE:

• If DTC B2192 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-118, "DTC Logic"

.

• If DTC B2192 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

BCS-119, "DTC Logic"

.

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-183, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756829

1.

PERFORM INITIALIZATION

Perform initialization with CONSULT. Re-register all mechanical keys.

For initialization and registration of mechanical key, refer to CONSULT Immobilizer mode and follow the on-

screen instructions.
Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> ID was unregistered.

NO

>> GO TO 2

2.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-126, "Removal and Installation"

.

2. Perform initialization with CONSULT. Re-register all mechanical keys.

For initialization and registration of mechanical key, refer to CONSULT Immobilizer mode and follow the

on-screen instructions.

Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> BCM is malfunctioning.

NO

>> GO TO 3

3.

REPLACE ECM

1. Replace ECM. Refer to 

EC-485, "Removal and Installation"

.

2. Perform initialization with CONSULT. Re-register all mechanical keys.

For initialization and registration of mechanical key, refer to CONSULT Immobilizer mode and follow the

on-screen instructions.

Can the system be initialized and can the engine be started with re-registered mechanical key?

YES

>> ECM is malfunctioning.

NO

>> GO TO 4

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2192

ID DISCORD BCM-
ECM

The ID verification results between BCM and ECM 
are NG. The registration is necessary.

• BCM
• ECM

P1611