Nissan Xterra. Manual - part 123

DIAGNOSIS SYSTEM [ABS ACTUATOR AND ELECTRIC UNIT (CONTROL 

UNIT)]

BRC-149

< SYSTEM DESCRIPTION >

[TYPE 2]

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ABS MOTOR

• Touch “On” and “Off” on screen. Make sure motor relay and actuator relay operate as shown in table below.

STOP LAMP ON RELAY

• Touch “On” and “Off” on screen. Make sure stop lamp relay operates as shown in table below. Brake lamps

will illuminate when relay is “On”.

Operation

On

Off

MOTOR RELAY

On

Off

ACTUATOR RLY

On

On

Operation

On

Off

STP ON RLY

On

Off

BRC-150

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 2]

APPLICATION NOTICE

DTC/CIRCUIT DIAGNOSIS

APPLICATION NOTICE

Application Notice

INFOID:0000000009482746

Service information

Remarks

TYPE 1

VDC/TCS/ABS

TYPE 2

HILL DESCENT CONTROL/HILL START ASSIST/VDC/TCS/ABS

C1101, C1102, C1103, C1104 WHEEL SENSOR

BRC-151

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 2]

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C1101, C1102, C1103, C1104 WHEEL SENSOR

Description

INFOID:0000000010255724

When the sensor rotor rotates, the magnetic field changes. It converts the magnetic field changes to current

signals (rectangular wave) and transmits them to the ABS actuator and electric unit (control unit). 

DTC Logic

INFOID:0000000010255725

DTC DETECTION LOGIC

DTC CONFIRMATION PROCEDURE

1.

CHECK SELF DIAGNOSTIC RESULT

 With 

CONSULT.

1. Start engine and drive vehicle at approximately 21 km/h (13 MPH) or more for approximately 5 minutes.

2. Perform self diagnostic result.
Is DTC C1101, C1102, C1103 or C1104 detected?

YES

>> Proceed to diagnosis procedure. Refer to 

BRC-151, "Diagnosis Procedure"

.

NO

>> Inspection End.

Diagnosis Procedure

INFOID:0000000010255726

Regarding Wiring Diagram information, refer to 

BRC-211, "Wiring Diagram - WITH HILL DESCENT CON-

TROL/HILL START ASSIST"

.

CAUTION:

Do not check between wheel sensor terminals.

1.

CONFIRM DTC

 With CONSULT

1. Perform self-diagnostic result of ABS and record all active DTCs.

2. Clear all DTCs.

3. Perform DTC confirmation procedure. Refer to 

BRC-151, "DTC Logic"

.

Does DTC C1101, C1102, C1103 or C1104 reset?

YES

>> GO TO 2.

NO

>> Refer to 

GI-40, "Intermittent Incident"

.

2.

INSPECT WHEEL SENSOR

Inspect the suspect wheel sensor for damage or deformation.

DTC

Display Item

Malfunction detected condition

Possible causes

C1101

RR RH SENSOR-1

• When power supply voltage of rear wheel sensor 

RH is low.

• When an open or shorted circuit is detected in rear 

wheel sensor RH circuit.

• Harness or connector
• Wheel sensor
• ABS actuator and electric unit 

(control unit)

C1102

RR LH SENSOR-1

• When power supply voltage of rear wheel sensor 

LH is low.

• When an open or shorted circuit is detected in rear 

wheel sensor LH circuit.

C1103

FR RH SENSOR-1

• When power supply voltage of front wheel sensor 

RH is low.

• When an open or shorted circuit is detected in front 

wheel sensor RH circuit.

C1104

FR LH SENSOR-1

• When power supply voltage of front wheel sensor 

LH is low.

• When an open or shorted circuit is detected in front 

wheel sensor LH circuit.

BRC-152

< DTC/CIRCUIT DIAGNOSIS >

[TYPE 2]

C1101, C1102, C1103, C1104 WHEEL SENSOR

Is the inspection result normal?

YES

>> GO TO 3.

NO

>> Repair or replace as necessary.

3.

HARNESS AND CONNECTOR INSPECTION

1. Disconnect ABS actuator and electric unit (control unit) connector E125 and wheel sensor connector of

suspect wheel.

2. Check harness, connectors and terminals for corrosion, deformation, disconnection, looseness or dam-

age.

Is the inspection result normal?

YES

>> GO TO 4.

NO

>> Repair or replace as necessary.

4.

CHECK WHEEL SENSOR OUTPUT SIGNAL

1. Connect ABS active wheel sensor tester (J-45741) to wheel sensor using appropriate adapter.

2. Turn on the ABS active wheel sensor tester power switch.

NOTE:

The green POWER indicator should illuminate. If the POWER indicator does not illuminate, replace the

battery in the ABS active wheel sensor tester before proceeding.

3. Spin the wheel of the vehicle by hand and observe the red SENSOR indicator on the ABS active wheel

sensor tester. The red SENSOR indicator should flash on and off to indicate an output signal.

NOTE:

If the red SENSOR indicator illuminates but does not flash, reverse the polarity of the test

er leads and retest.

Does the ABS active wheel sensor tester detect a signal?

YES

>> GO TO 5.

NO

>> Replace the wheel sensor. Refer to 

BRC-232, "Removal and Installation"

.

5.

CHECK WIRING HARNESS FOR SHORT TO VOLTAGE

1. Turn ignition switch ON.

2. Check voltage between wheel sensor harness connector terminals of suspect wheel and ground.

Is the inspection result normal?

YES

>> GO TO 6.

NO

>> Repair the circuit.

6.

CHECK WIRING HARNESS FOR SHORT TO GROUND

1. Turn ignition switch OFF.

2. Check continuity between wheel sensor harness connector terminals of suspect wheel and ground.

Wheel Sensor

Ground

Voltage

Wheel

Connector

Terminal

Front LH

E18

1

—

0V

2

Front RH

E117

1

2

Rear LH

C11

1

2

Rear RH

C10

1

2

Wheel Sensor

Ground

Continuity

Wheel

Connector

Terminal