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.

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

Diagnosis procedure

1.REPLACE BCM

When DTC “U1010” is detected, replace BCM.

>> Replace BCM. Refer to BCS-73, "Removal and Installation".

U0415 vehicle speed

Dtc logic

DTC DETECTION LOGIC

NOTE:

• If DTC U0415 is displayed with DTC U1000, first perform the trouble diagnosis for DTC U1000. Refer to BCS-63, "DTC Logic".
• If DTC U0415 is displayed with DTC U1010, first perform the trouble diagnosis for DTC U1010. Refer to BCS-64, "DTC Logic".

DTC CONFIRMATION PROCEDURE

1. DTC CONFIRMATION

1. Erase the DTC
2. Turn ignition switch OFF
3. Perform Self Diagnostic Result of BCM with CONSULT, after the ignition switch has been turned ON for 2 seconds or more.

Is any DTC detected? YES >> Refer to BCS-65, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis procedure

1. ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF DIAGNOSTIC RESULT

Perform Self Diagnostic Result of ABS with CONSULT. Refer to BRC-31, "CONSULT Function (ABS)".

Is any DTC detected? YES >> Perform the trouble diagnosis related to the detected DTC. Refer to BRC-43, "DTC Index".

NO >> GO TO 2.

2. CHECK ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) POWER SUPPLY AND GROUND CIRCUIT

Check ABS actuator and electric unit (control unit) power and ground. Refer to BRC-62, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace harness or connectors.

3. COMBINATION METER SELF DIAGNOSTIC RESULT

Perform Self Diagnostic Result of METER M&A with CONSULT. Refer to MWI-17, "CONSULT Function (METER/M&A)".

Is any DTC detected? YES >> Perform the trouble diagnosis related to the detected DTC. Refer to MWI-26, "DTC Index".

NO >> Refer to GI-39, "Intermittent Incident".

B2562 low voltage

Dtc logic

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1. DTC CONFIRMATION

1. Erase DTC.
2. Turn ignition switch OFF.
3. Perform the Self Diagnostic Result of BCM with CONSULT, after the ignition switch has been turned ON for 120 seconds or more.

Is any DTC detected? YES >> Refer to BCS-66, "Diagnosis Procedure".

NO >> Inspection End.

Diagnosis procedure

1. CHECK BATTERY VOLTAGE

Check battery voltage.

Is battery voltage less than 8.8V? YES >> Charge battery and retest. Refer to CHG-14, "Work Flow (With EXP-800 NI or GR8-1200 NI)" or CHG-17, "Work Flow (Without EXP-800 NI or GR8-1200 NI)".

NO >> GO TO 2.

2. CHECK POWER SUPPLY AND GROUND CIRCUIT

Check BCM power supply and ground circuit. Refer to BCS-67, "Diagnosis Procedure".

Is the inspection result normal? YES >> GO TO 3.

NO >> Repair or replace harness or connectors.

3. BCM SELF DIAGNOSTIC RESULT

Perform Self Diagnostic Result of BCM with CONSULT. Refer to BCS-24, "BCM : CONSULT Function (BCM - BCM)".

Is DTC B2562 CRNT? YES >> Replace BCM. Refer to BCS-73, "Removal and Installation".

NO >> Refer to GI-39, "Intermittent Incident".

Power supply and ground circuit

Diagnosis procedure

Regarding wiring diagram information, refer to bcs-51, "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. Disconnect BCM connector M85.
2. Check voltage between bcm connector m85 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 M85 and ground.

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

No >> repair harness or connector.

Combination switch input circuit

Diagnosis procedure

Regarding Wiring Diagram information, refer to BCS-51, "Wiring Diagram".

1.Check input 1 - 5 circuit for open

1. Turn ignition switch off.
2. Disconnect bcm and combination switch connectors.
3. Check continuity between BCM connector and combination switch connector.

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

No >> repair harness or connectors.

2.Check input 1 - 5 circuit for short

Check for continuity between bcm connector and ground.

Is the inspection result normal? YES >> Repair harness or connectors.

NO >> GO TO 3.

3.Check bcm output voltage

1. Connect bcm connector.
2. Check voltage between bcm connector and ground.

Is the inspection result normal? Yes >> replace combination switch.

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

Combination switch output circuit

Diagnosis procedure

Regarding wiring diagram information, refer to bcs-51, "wiring diagram".

1.Check output 1 - 5 circuit for open

1. Turn ignition switch off.
2. Disconnect bcm and combination switch connectors.
3. Check continuity between BCM connector and combination switch connector.

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

No >> repair harness or connectors.

2.Check output 1 - 5 circuit for short

Check for continuity between BCM connector and ground.

Is the inspection result normal? YES >> Repair harness or connectors.

NO >> GO TO 3.

3.Check bcm input signal

1. Connect bcm and combination switch connectors.
2. Turn ON any switch in the system that is malfunctioning.
3. Check voltage between bcm connector and ground.

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

No >> replace combination switch.