Nissan Sentra Service Manual: DTC/circuit diagnosis

U1000 CAN COMM CIRCUIT

Description

Refer to lan-7, "can communication system : system description".

Dtc logic

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 seconds 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-73, "removal and installation".

B2621 inside antenna

Dtc logic

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle Intelligent Key antenna signal strength

Dtc detection logic

Dtc	Consult display description	Dtc detecting condition	Possible cause
B2621	Inside antenna 1	An excessive high or low voltage from inside antenna (instrument center) is sent to BCM	Inside key antenna (instrument center) Harness between bcm and inside key antenna (instrument center) BCM

Dtc confirmation procedure

1.Perform dtc confirmation procedure

1. Select INTELLIGENT KEY of BCM using CONSULT.
2. Select INSIDE ANT DIAGNOSIS in WORK SUPPORT mode.
3. Perform inside key antenna (INSIDE ANT DIAGNOSIS) on WORK SUPPORT of INTELLIGENT KEY.
4. Check BCM for DTC.

Is inside key antenna DTC detected? YES >> Refer to DLK-72, "Diagnosis Procedure".

NO >> Inside key antenna (instrument center) is OK.

Diagnosis procedure

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check Intelligent Key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Regarding wiring diagram information, refer to dlk-49, "wiring diagram".

1.Check inside key antenna input signal 1

1. Turn ignition switch on.
2. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace bcm. Refer to bcs-73, "removal and installation".

No >> go to 2.

2.Check inside key antenna circuit

1. Turn ignition switch OFF.
2. Disconnect bcm connector and inside key antenna (instrument center) connector.
3. Check continuity between bcm harness connector and inside key antenna (instrument center) 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 inside key antenna input signal 2

1. Replace inside key antenna (instrument center). (New antenna or other antenna)
2. Connect bcm connector and inside key antenna (instrument center) connector.
3. Turn ignition switch on.
4. Check signal between bcm harness connector and ground using oscilloscope

Is the inspection result normal? Yes >> replace inside key antenna (instrument center).

No >> replace bcm. Refer to bcs-73, "removal and installation".

B2622 inside antenna

Dtc logic

Note:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Dtc detection logic

Dtc	Consult display description	Dtc detecting condition	Possible cause
B2622	INSIDE ANTENNA 2	An excessive high or low voltage from inside antenna (console) is sent to bcm	Inside key antenna (console) Harness between BCM and inside key antenna (console) BCM

Dtc confirmation procedure

1.Perform dtc confirmation procedure

1. Select intelligent key of bcm using consult.
2. Select inside ant diagnosis in work support mode.
3. Perform inside key antenna (inside ant diagnosis) on work support of intelligent key.
4. Check BCM for DTC.

Is inside key antenna dtc detected? Yes >> refer to dlk-75, "diagnosis procedure".

No >> inside key antenna (console) is ok.

Diagnosis procedure

Note:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle Intelligent Key antenna signal strength

Regarding wiring diagram information, refer to dlk-49, "wiring diagram".

1.Check inside key antenna input signal 1

1. Turn ignition switch ON.
2. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? YES >> Replace BCM. Refer to BCS-73, "Removal and Installation".

NO >> GO TO 2.

2.Check inside key antenna circuit

1. Turn ignition switch OFF.
2. Disconnect BCM connector and inside key antenna (console) connector
3. Check continuity between bcm harness connector and inside key antenna (console) 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 inside key antenna input signal 2

1. Replace inside key antenna (console). (New antenna or other antenna)
2. Connect bcm connector and inside key antenna (console) connector.
3. Turn ignition switch ON.
4. Check signal between BCM harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace inside key antenna (console).

No >> replace bcm. Refer to bcs-73, "removal and installation".

B2623 inside antenna

Dtc logic

Note:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle Intelligent Key antenna signal strength

Dtc detection logic

Dtc	Consult display description	Dtc detecting condition	Possible cause
B2623	INSIDE ANTENNA 3	An excessive high or low voltage from inside antenna (trunk room) is sent to bcm	Inside key antenna (trunk room) Harness between bcm and inside key antenna (trunk room) Bcm

Dtc confirmation procedure

1.Perform dtc confirmation procedure

1. Select INTELLIGENT KEY of BCM using CONSULT.
2. Select inside ant diagnosis in work support mode.
3. Perform inside key antenna (inside ant diagnosis) on work support of intelligent key.
4. Check BCM for DTC.

Is inside key antenna dtc detected? Yes >> refer to dlk-78, "diagnosis procedure".

No >> inside key antenna (trunk room) is ok.

Diagnosis procedure

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle Intelligent Key antenna signal strength

Regarding Wiring Diagram information, refer to DLK-49, "Wiring Diagram".

1.Check inside key antenna input signal 1

1. Turn ignition switch ON.
2. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace bcm. Refer to bcs-73, "removal and installation".

No >> go to 2.

2.Check inside key antenna circuit

1. Turn ignition switch off.
2. Disconnect BCM connector and inside key antenna (trunk room) connector.
3. Check continuity between BCM harness connector and inside key antenna (trunk room) 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 inside key antenna input signal 2

1. Replace inside key antenna (trunk room). (New antenna or other antenna)
2. Connect bcm connector and inside key antenna (trunk room) connector.
3. Turn ignition switch ON.
4. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace inside key antenna (trunk room).

No >> replace bcm. Refer to bcs-73, "removal and installation".

B2626 outside antenna

Dtc logic

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check Intelligent Key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Dtc detection logic

DTC	CONSULT display description	DTC detecting condition	Possible cause
B2626	B2626 OUTSIDE ANTENNA 1	An excessive high or low voltage from outside key antenna (driver side) is sent to BCM	Outside key antenna (driver side) Harness between BCM and outside key antenna (driver side) BCM

DTC CONFIRMATION PROCEDURE

1.PERFORM DTC CONFIRMATION PROCEDURE

1. Turn ignition switch ON.
2. Check “Self Diagnostic Result” mode of “BCM” using CONSULT.

Is DTC detected? YES >> Refer to DLK-81, "Diagnosis Procedure".

NO >> Outside key antenna (driver side) is OK.

Diagnosis Procedure

NOTE:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check Intelligent Key relative signal strength
• Confirm vehicle Intelligent Key antenna signal strength

Regarding Wiring Diagram information, refer to DLK-49, "Wiring Diagram".

1.Check outside key antenna input signal 1

1. Turn ignition switch ON.
2. Check signal between BCM harness connector and ground using oscilloscope.

Is the inspection result normal? YES >> Replace BCM. Refer to BCS-73, "Removal and Installation".

NO >> GO TO 2.

2.Check outside key antenna circuit

1. Turn ignition switch OFF.
2. Disconnect bcm connector and outside key antenna (driver side) connector.
3. Check continuity between bcm harness connector and outside key antenna (driver side) 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 outside key antenna input signal 2

1. Replace outside key antenna (driver side). (New antenna or other antenna)
2. Connect bcm connector and outside key antenna (driver side) connector.
3. Turn ignition switch on.
4. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace outside key antenna (driver side).

No >> replace bcm. Refer to bcs-73, "removal and installation".

B2627 outside antenna

Dtc logic

Note:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Dtc detection logic

Dtc	Consult display description	Dtc detecting condition	Possible cause
B2627	Outside antenna 2	An excessive high or low voltage from outside key antenna (passenger side ) is sent to BCM	Outside key antenna (passenger side) Harness between BCM and outside key antenna (passenger side) BCM

Dtc confirmation procedure

1.Perform dtc confirmation procedure

1. Turn ignition switch on.
2. Check self diagnostic result mode of bcm using consult.

Is outside key antenna dtc detected? Yes >> refer to dlk-84, "diagnosis procedure".

No >> outside key antenna (passenger side) is ok.

Diagnosis procedure

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Regarding wiring diagram information, refer to dlk-49, "wiring diagram".

1.Check outside key antenna input signal 1

1. Turn ignition switch ON.
2. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace bcm. Refer to bcs-73, "removal and installation".

No >> go to 2.

2.Check outside key antenna circuit

1. Turn ignition switch OFF.
2. Disconnect BCM connector and outside key antenna (passenger side) connector.
3. Check continuity between bcm harness connector and outside key antenna (passenger side) 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 outside key antenna input signal 2

1. Replace outside key antenna (passenger side). (New antenna or other antenna)
2. Connect bcm connector and outside key antenna (passenger side) connector.
3. Turn ignition switch on.
4. Check signal between bcm harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace outside key antenna (passenger side).

No >> replace bcm. Refer to bcs-73, "removal and installation".

B2628 outside antenna

Dtc logic

Note:

The Signal Tech II Tool (J-50190) can be used to perform the following functions. Refer to the Signal Tech II User Guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Dtc detection logic

Dtc	Consult display description	Dtc detecting condition	Possible cause
B2628	OUTSIDE ANTENNA 3	An excessive high or low voltage from outside key antenna (rear bumper) is sent to bcm	Outside key antenna (rear bumper) Harness between bcm and outside key antenna (rear bumper) Bcm

Dtc confirmation procedure

1.Perform dtc confirmation procedure

1. Turn ignition switch on.
2. Check Self Diagnostic Result mode of BCM using CONSULT.

Is outside key antenna dtc detected? Yes >> refer to dlk-87, "diagnosis procedure".

No >> outside key antenna (rear bumper) is ok.

Diagnosis procedure

Note:

The signal tech ii tool (j-50190) can be used to perform the following functions. Refer to the signal tech ii user guide for additional information.

• Check intelligent key relative signal strength
• Confirm vehicle intelligent key antenna signal strength

Regarding wiring diagram information, refer to dlk-49, "wiring diagram".

1.Check outside key antenna input signal 1

1. Turn ignition switch ON.
2. Check signal between BCM harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace bcm. Refer to bcs-73, "removal and installation".

No >> go to 2.

2.Check outside key antenna circuit

1. Turn ignition switch off.
2. Disconnect bcm connector and outside key antenna (rear bumper) connector.
3. Check continuity between bcm harness connector and outside key antenna (rear bumper) 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 outside key antenna input signal 2

1. Replace outside key antenna (rear bumper). (New antenna or other antenna)
2. Connect bcm and outside key antenna (rear bumper) connector.
3. Turn ignition switch on.
4. Check signal between BCM harness connector and ground using oscilloscope.

Is the inspection result normal? Yes >> replace outside key antenna (rear bumper).

No >> replace bcm. Refer to bcs-73, "removal and installation".