Infiniti FX35, FX50 (S51). Manual - part 214

BCS

U0415 VEHICLE SPEED SIG

BCS-37

< DTC/CIRCUIT DIAGNOSIS >

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U0415 VEHICLE SPEED SIG

Description

INFOID:0000000005249331

U0415 is displayed if any unusual condition is present in the reception status of the vehicle speed signal from
the ABS actuator and electric unit (control unit).

DTC Logic

INFOID:0000000005249332

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION

1.

Erase the DTC.

2.

Turn ignition switch OFF.

3.

Perform the “Self Diagnostic Result” of CONSULT-III, when passed 2 seconds or more after the ignition
switch is turned ON.

Is any DTC detected?

YES

>> Refer to 

BCS-37, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249333

1.

ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT) SELF-DIAG RESULTS 

Perform “Self-Diagnostic Result” of ABS actuator and electric unit (control unit) with CONSULT-III. Refer to

BRC-44, "CONSULT-III Function"

.

Is any DTC detected?

YES

>> Repair or replace the malfunctioning part.

NO

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

DTC

 CONSULT-III display 

description

DTC Detection Condition

Probable cause

U0415

VEHICLE SPEED

When the vehicle speed signal received from 
the ABS actuator and electric unit (control 
unit) remains abnormal for 2 seconds or more.

• ABS actuator and electric unit (control unit)
• BCM

BCS-38

< DTC/CIRCUIT DIAGNOSIS >

B2562 LOW VOLTAGE

B2562 LOW VOLTAGE

DTC Logic

INFOID:0000000005249334

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION

1.

Erase DTC.

2.

Turn ignition switch OFF.

3.

Perform the “Self Diagnostic Result” of CONSULT-III, when passed 120 seconds or more after the ignition
switch is turned ON.

Is any DTC detected?

YES

>> Refer to 

BCS-38, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249335

1.

CHECK POWER SUPPLY CIRCUIT

Check BCM power supply circuit. Refer to 

BCS-40, "Diagnosis Procedure"

.

Is the circuit normal?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> Repair the malfunctioning part.

DTC

CONSULT-III display 

description

DTC Detection Condition

Possible cause

B2562

LOW VOLTAGE

When the power supply voltage to BCM remains less 
than 8.8 V for 120 seconds or more

Harness or connector (power supply 
circuit)

BCS

B26E7 TPMS CAN COMM

BCS-39

< DTC/CIRCUIT DIAGNOSIS >

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B26E7 TPMS CAN COMM

DTC Logic

INFOID:0000000005249336

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

DTC CONFIRMATION

1.

Erase the DTC.

2.

Turn ignition switch OFF.

3.

Perform the “Self Diagnostic Result” of CONSULT-III, when passed 2 seconds or more after the ignition
switch is turned ON.

Is any DTC detected?

YES

>> Refer to 

BCS-39, "Diagnosis Procedure"

.

NO

>> INSPECTION END

Diagnosis Procedure

INFOID:0000000005249337

NOTE:
If DTC “B26E7” detected along with DTC “U1000”, first diagnose the DTC “U1000”. Refer to 

BCS-35, "Diagno-

sis Procedure"

.

1.

LOW TIRE PRESSURE WARNING CONTROL UNIT SELF DIAGNOSTIC RESULT 

Perform “Self Diagnostic Result” of low tire pressure warning control unit with CONSULT-III. Refer to 

WT-12,

"CONSULT-III Function"

.

Is any DTC detected?

YES

>> GO TO 2.

NO

>> GO TO 4.

2.

LOW TIRE PRESSURE WARNING CONTROL UNIT DIAGNOSIS

Perform low tire pressure warning control unit component diagnosis of detected DTC. Refer to 

BCS-78,

"DTC Index"

.

>> GO TO 3.

3.

BCM SELF DIAGNOSTIC RESULT

Erase DTC of BCM, and perform “Self Diagnostic Result” again.

Is DTC “B26E7” detected?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> INSPECTION END

4.

REPLACE LOW TIRE PRESSURE WARNING CONTROL UNIT TEMPORARILY

Remove low tire pressure warning control unit, and install normal low tire pressure warning control unit. 

>> GO TO 5.

5.

BCM SELF-DIAGNOSTIC RESULT

Erase DTC of BCM, and perform “Self Diagnostic Result” again.

Is DTC “B26E7” detected?

YES

>> Replace BCM. Refer to 

BCS-83, "Exploded View"

.

NO

>> Replace low tire pressure warning control unit. Refer to 

WT-76, "Exploded View"

.

DTC

 CONSULT-III display description

DTC Detection Condition

Probable cause

B26E7

TPMS CAN COMM

When ignition switch is ON, BCM cannot re-
ceived CAN communication signal from low 
tire pressure warning control unit.

• CAN communication system
• Low tire pressure warning control unit
• BCM

BCS-40

< DTC/CIRCUIT DIAGNOSIS >

POWER SUPPLY AND GROUND CIRCUIT

POWER SUPPLY AND GROUND CIRCUIT

Diagnosis Procedure

INFOID:0000000005249338

1.

CHECK FUSE AND FUSIBLE LINK

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

Is the fuse fusing?

YES

>> Replace the blown fuse or fusible link after repairing the affected circuit if a fuse or fusible link is

blown.

NO

>> GO TO 2.

2.

CHECK POWER SUPPLY CIRCUIT

1.

Turn ignition switch OFF.

2.

Disconnect BCM connectors.

3.

Check voltage between BCM harness connector and ground.

Is the measurement value normal?

YES

>> GO TO 3.

NO

>> Repair harness or connector.

3.

CHECK GROUND CIRCUIT

Check continuity between BCM harness connector and ground.

Does continuity exist?

YES

>> INSPECTION END

NO

>> Repair harness or connector.

Signal name

Fuse and fusible link No.

Battery power supply

L

10

Terminals

Voltage

(Approx.)

(+)

(

−

)

BCM

Ground

Connector

Terminal

M118

1

Battery voltage

M119

11

BCM

Ground

Continuity

Connector

Terminal

M119

13

Existed