Nissan Sentra. Manual - part 787

SEC-176

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

U1000 CAN COMM

DTC/CIRCUIT DIAGNOSIS

U1000 CAN COMM

Description

INFOID:0000000009756813

Refer to 

LAN-7, "CAN COMMUNICATION SYSTEM : System Description"

.

DTC Logic

INFOID:0000000009756814

DTC DETECTION LOGIC

NOTE:

U1000 can be set if a module harness was disconnected and reconnected, perhaps during a repair. Confirm

that there are actual CAN diagnostic symptoms and a present DTC by performing the Self Diagnostic Result

procedure.

Diagnosis Procedure

INFOID:0000000009756815

1.

 PERFORM SELF DIAGNOSTIC RESULT

1. Turn ignition switch ON and wait for 2 second or more.

2. Check “SELF- DIAG RESULTS”.
Is “CAN COMM CIRCUIT” displayed?

YES

>> Perform CAN Diagnosis as described in DIAGNOSIS section of CONSULT operation manual.

NO

>> Refer to 

GI-39, "Intermittent Incident"

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CONSULT Display

DTC Detection Condition

Possible Cause

CAN COMM CIRCUIT
[U1000]

When any listed module cannot communicate 
with CAN communication signal continuously for 
2 seconds or more with ignition switch ON

In CAN communication system, any item (or 
items) of the following listed below is malfunc-
tioning.
• Transmission
• Receiving (ECM)
• Receiving (VDC/TCS/ABS)
• Receiving (METER/M&A)
• Receiving (TCM)
• Receiving (IPDM E/R)

U1010 CONTROL UNIT (CAN)

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< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

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U1010 CONTROL UNIT (CAN)

DTC Logic

INFOID:0000000009756816

DTC DETECTION LOGIC

Diagnosis Procedure

INFOID:0000000009756817

1.

REPLACE BCM

When DTC “U1010” is detected, replace BCM.

>> Replace BCM. Refer to 

BCS-126, "Removal and Installation"

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CONSULT Display

DTC Detection Condition

Possible Cause

CONTROL UNIT (CAN)
[U1010]

BCM detected internal CAN communication cir-
cuit malfunction.

BCM

SEC-178

< DTC/CIRCUIT DIAGNOSIS >

[WITHOUT INTELLIGENT KEY SYSTEM]

P1610 LOCK MODE

P1610 LOCK MODE

Description

INFOID:0000000009756818

When the starting operation is carried more than five times consecutively under the following conditions, NATS

will shift to the mode which prevents the engine from being started.

• Unregistered mechanical key is used.

• BCM or ECM malfunctioning.

DTC Logic

INFOID:0000000009756819

DTC DETECTION 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-178, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756820

1.

CHECK ENGINE START FUNCTION

1. Perform the check for DTC except DTC P1610.

2. Use CONSULT to erase DTC after fixing.

3. Check that engine can start with registered mechanical key.
Does the engine start?

YES

>> Inspection End.

NO

>> GO TO 2

2.

CHECK INTERMITTENT INCIDENT

Refer to 

GI-39, "Intermittent Incident"

.

>> Inspection End.

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

P1610

LOCK MODE

When the starting operation is carried out 
five or more times consecutively under the 
following conditions.
• Unregistered mechanical key
• BCM or ECM malfunctioning.

• Mechanical key
• BCM
• ECM

B2190, P1614 NATS ANTENNA AMP.

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[WITHOUT INTELLIGENT KEY SYSTEM]

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B2190, P1614 NATS ANTENNA AMP.

Description

INFOID:0000000009756821

Performs ID verification through BCM and NATS antenna amplifier when ignition key is inserted and ignition

switch turned ON.

Prohibits the start of engine when an unregistered ID of ignition key is used.

DTC Logic

INFOID:0000000009756822

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

PERFORM DTC CONFIRMATION PROCEDURE

1. Insert ignition key into the key cylinder.

2. Turn ignition switch ON.

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

YES

>> Refer to 

SEC-179, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000009756823

Regarding Wiring Diagram information, refer to 

SEC-152, "Wiring Diagram"

.

1.

CHECK NATS ANTENNA AMP. INSTALLATION

Check NATS antenna amp. installation. Refer to 

SEC-193, "Removal and Installation"

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Is the inspection result normal?

YES

>> GO TO 2

NO

>> Reinstall NATS antenna amp. correctly.

2.

CHECK NVIS (NATS) IGNITION KEY ID CHIP

Start engine with another registered NATS ignition key.
Does the engine start?

YES

>> • Ignition key ID chip is malfunctioning.

• Replace the ignition key.

• Perform initialization with CONSULT.

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

NO

>> GO TO 3

3.

CHECK POWER SUPPLY FOR NATS ANTENNA AMP.

1. Turn ignition switch ON.

2. Check voltage between NATS antenna amp. connector M42 terminal 1 and ground.

Is the inspection result normal?

DTC No.

Trouble diagnosis 

name

DTC detecting condition

Possible cause

B2190

NATS ANTENNA 
AMP

• Inactive communication between NATS antenna 

amp. and BCM.

• Ignition key is malfunctioning.

• Harness or connectors

(The NATS antenna amp. circuit is 
open or shorted)

• Ignition  key
• NATS antenna amp.
• BCM

P1614

1 - Ground

: Battery voltage