Nissan Frontier. Manual - part 1131

B2191, P1615 DIFFERENCE OF KEY

SEC-21

< DTC/CIRCUIT DIAGNOSIS >

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B2191, P1615 DIFFERENCE OF KEY

Description

INFOID:0000000009479041

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

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

DTC Logic

INFOID:0000000009479042

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-21, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479043

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-49, "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

SEC-22

< DTC/CIRCUIT DIAGNOSIS >

B2192, P1611 ID DISCORD, IMMU-ECM

B2192, P1611 ID DISCORD, IMMU-ECM

Description

INFOID:0000000009479044

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:0000000009479045

DTC DETECTION LOGIC

NOTE:

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

BCS-26, "DTC Logic"

.

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

SEC-17, "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-22, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479046

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-49, "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 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

B2192, P1611 ID DISCORD, IMMU-ECM

SEC-23

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4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-42, "Intermittent Incident"

.

>> Inspection End.

SEC-24

< DTC/CIRCUIT DIAGNOSIS >

B2193, P1612 CHAIN OF ECM-IMMU

B2193, P1612 CHAIN OF ECM-IMMU

Description

INFOID:0000000009479047

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:0000000009479048

DTC DETECTION LOGIC

NOTE:

• If DTC B2193 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to

BCS-26, "DTC Logic"

.

• If DTC B2193 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to

SEC-17, "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-24, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009479049

1.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-49, "Removal and Installation"

.

2. Perform initialization with CONSULT.

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

Does the engine start?

YES

>> BCM was malfunctioning.

NO

>> ECM is malfunctioning.

• Replace ECM.

• Perform ECM re-communicating function.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2193

CHAIN OF BCM-
ECM

Inactive communication between ECM and BCM

• Harness or connectors

(The CAN communication line is 
open or short)

• BCM
• ECM

P1612