Nissan Sentra. Manual - part 789

SEC-184

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2192, P1611 ID DISCORD, IMMU-ECM

4.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

B2193, P1612 CHAIN OF ECM-IMMU

SEC-185

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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B2193, P1612 CHAIN OF ECM-IMMU

Description

INFOID:0000000009756830

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:0000000009756831

DTC DETECTION LOGIC

NOTE:

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

BCS-118, "DTC Logic"

.

• If DTC B2193 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-185, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756832

1.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-126, "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

>> Inspection End.

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

SEC-186

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

B2195 ANTI-SCANNING

B2195 ANTI-SCANNING

DTC Logic

INFOID:0000000009756833

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Check DTC in “Self Diagnostic Result” mode of “BCM” using CONSULT.
Is DTC detected?

YES

>> Refer to 

SEC-186, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756834

1.

CHECK SELF DIAGNOSTIC RESULT 1

1. Select “Self Diagnostic Result” of “BCM” using CONSULT.

2. Erase DTC.

3. Perform DTC Confirmation Procedure for DTC P2195. Refer to 

SEC-186, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 2. 

NO

>> Inspection End.

2.

CHECK EQUIPMENT OF THE VEHICLE

Check that unspecified accessory part related to engine start is not installed.
Is unspecified accessory part related to engine start installed?

YES

>> GO TO 3.

NO

>> GO TO 4.

3.

CHECK SELF DIAGNOSTIC RESULT 2

1. Obtain the customer’s approval to remove unspecified accessory part related to engine start, and then

remove it.

2. Select “Self Diagnostic Result” of “BCM” using CONSULT.

3. Erase DTC.

4. Perform DTC CONFIRMATION PROCEDURE for DTC B2195. Refer to 

SEC-186, "DTC Logic"

.

Is DTC detected?

YES

>> GO TO 4.

NO

>> Inspection End.

4.

REPLACE BCM

1. Replace BCM. Refer to 

BCS-126, "Removal and Installation"

.

2. Perform initialization of BCM and registration of all ignition keys using CONSULT.

For initialization and registration procedures, refer to CONSULT Immobilizer mode and follow the on-

screen instructions.

>> Inspection End.

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2195

ANTI SCANNING

ID verification between BCM and ECM  is de-
tected out of specification 

ID verification request out of specifi-
cation

B2196 DONGLE UNIT

SEC-187

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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B2196 DONGLE UNIT

Description

INFOID:0000000009756835

BCM performs ID verification between BCM and dongle unit.

When verification result is OK, BCM permits cranking.

DTC Logic

INFOID:0000000009756836

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.

2. Turn ignition switch OFF.

3. Turn ignition switch ON.

4. Check DTC in “Self-diagnosis result” mode of “BCM” using CONSULT.
Is the DTC detected?

YES

>> Refer to 

SEC-187, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756837

Regarding Wiring Diagram information, refer to 

SEC-152, "Wiring Diagram"

.

1.

PERFORM INITIALIZATION

1. Perform initialization of BCM and registration of all mechanical keys using CONSULT.

For initialization and registration procedures, refer to CONSULT Immobilizer mode and follow the on-

screen instructions.

2. Start the engine.
Does the engine start?

YES

>> Inspection End.

NO

>> GO TO 2.

2.

CHECK DONGLE UNIT CIRCUIT

1. Turn ignition switch OFF.

2. Disconnect BCM connector and dongle unit connector.

3. Check continuity between BCM harness connector and dongle unit harness connector.

4. Check continuity between BCM harness connector and ground.

Is the inspection result normal?

DTC No.

Trouble diagnosis name

DTC detecting condition

Possible cause

B2196

DONGLE NG

The ID verification results between BCM 
and dongle unit is NG.

• Harness or connectors

(Dongle unit circuit is open or shorted.)

• Dongle unit

BCM

Dongle unit

Continuity

Connector

Terminal

Connector

Terminal

M21

24

M39

1

Yes

BCM

Ground

Continuity

Connector

Terminal

M21

24

No