Nissan Sentra Service Manual: Dtc/circuit diagnosis

Power supply and ground circuit

Diagnosis Procedure

Refer to LAN-7, "CAN COMMUNICATION SYSTEM : System Description".

Vehicle security indicator

Description

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.

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 malfunctioning. Transmission Receiving (ECM) Receiving (VDC/TCS/ABS) Receiving (METER/M&A) Receiving (TCM) Receiving (IPDM E/R)

Diagnosis Procedure

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".

U1010 CONTROL UNIT (CAN)

DTC Logic

DTC DETECTION LOGIC

CONSULT Display	DTC Detection Condition	Possible Cause
CONTROL UNIT (CAN) [U1010]	BCM detected internal CAN communication circuit malfunction.	BCM

Diagnosis Procedure

1.REPLACE BCM

When DTC “U1010” is detected, replace BCM.

>> Replace BCM. Refer to BCS-126, "Removal and Installation".

P1610 LOCK MODE

Description

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

DTC DETECTION LOGIC

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

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

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.

B2190, P1614 NATS ANTENNA AMP.

Description

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

DTC DETECTION LOGIC

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

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

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".

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.

1 - Ground : Battery voltage

Is the inspection result normal?

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.

3 - Ground : Continuity should exist.

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:

If harness is OK, replace BCM, refer to BCS-126, "Removal and Installation". Perform initialization with CONSULT. For initialization, refer to CONSULT Immobilizer mode and follow the onscreen instructions.

B2191, P1615 DIFFERENCE OF KEY

Description

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

DTC DETECTION LOGIC

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
B2191	DIFFERENCE OF KEY	The ID verification results between BCM and mechanical key are NG. The registration is necessary.	Mechanical key
P1615

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

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 onscreen 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.

B2192, P1611 ID DISCORD, IMMU-ECM

Description

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 starting if the ID is not registered.

DTC Logic

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 No.	Trouble diagnosis name	DTC detecting condition	Possible cause
B2192	ID DISCORD BCMECM	The ID verification results between BCM and ECM are NG. The registration is necessary.	BCM ECM
P1611

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

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 onscreen 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

4.CHECK INTERMITTENT INCIDENT

Refer to GI-39, "Intermittent Incident".

>> Inspection End.

B2193, P1612 CHAIN OF ECM-IMMU

Description

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 starting if the ID is not registered.

DTC Logic

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 No.	Trouble diagnosis name	DTC detecting condition	Possible cause
B2193	CHAIN OF BCMECM	Inactive communication between ECM and BCM	Harness or connectors (The CAN communication line is open or short) BCM ECM
P1612

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

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.

B2195 ANTI-SCANNING

DTC Logic

DTC DETECTION LOGIC

DTC No.	Trouble diagnosis name	DTC detecting condition	Possible cause
B2195	ANTI SCANNING	ID verification between BCM and ECM is detected out of specification	ID verification request out of specification

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

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 onscreen instructions.

>> Inspection End.

B2196 DONGLE UNIT

Description

BCM performs ID verification between BCM and dongle unit.

When verification result is OK, BCM permits cranking.

DTC Logic

DTC DETECTION LOGIC

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

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

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 onscreen 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?

Yes >> go to 3.

No >> repair or replace harness.

3.Check dongle unit ground circuit

Check continuity between dongle unit harness connector and ground.

Is the inspection result normal? Yes >> replace dongle unit.

No >> repair or replace harness.

Power supply and ground circuit

Diagnosis procedure

Regarding wiring diagram information, refer to bcs-111, "wiring diagram".

1.Check fuses and fusible link

Check that the following fuses and fusible link are not blown.

Is the fuse blown? Yes >> replace the blown fuse or fusible link after repairing the affected circuit.

No >> go to 2.

2.Check power supply circuit

1. Turn ignition switch OFF.
2. Disconnect bcm connectors.
3. Check voltage between bcm connector and ground.

Is the inspection result normal? Yes >> go to 3.

No >> repair harness or connector.

3.Check ground circuit

Check continuity between BCM connector and ground.

Is the inspection result normal? Yes >> inspection end.

No >> repair harness or connector.

Vehicle security indicator

Description

• Vehicle security indicator is built in combination meter.
• NATS (Nissan Anti-Theft System) condition is indicated by blink or illumination of vehicle security indicator.

Component function check

1.Check function

1. Perform active test of theft ind in the immu mode with consult.
2. Check vehicle security indicator operation.

Is the inspection result normal? Yes >> inspection end.

No >> refer to sec-190, "diagnosis procedure".

Diagnosis procedure

Regarding wiring diagram information, refer to sec-152, "wiring diagram".

1.Check security indicator lamp power supply circuit

1. Turn ignition switch off.
2. Disconnect combination meter connector.
3. Check voltage between combination meter harness connector and ground.

Is the inspection result normal? Yes >> go to 2.

No-1 >> check 10 a fuse [no. 8, Located in the fuse block (j/b)].

No-2 >> check harness for open or short between combination meter and fuse.

2.Check security indicator lamp signal

1. Connect combination meter connector.
2. Disconnect BCM connector.
3. Check voltage between bcm harness connector and ground.

Is the inspection result normal? YES >> Replace BCM. Refer to BCS-126, "Removal and Installation".

NO >> GO TO 3.

3.Check security indicator lamp circuit

1. Disconnect combination meter connector.
2. Check continuity between combination meter harness connector and BCM harness connector.

3. Check continuity between combination meter harness connector and ground.

Is the inspection result normal? Yes >> replace combination meter. Refer to mwi-77, "removal and installation".

No >> repair or replace harness.