abs motor NISSAN X-TRAIL 2005 Service Repair Manual

EM-82
[QR]
ENGINE ASSEMBLY

REMOVAL
Outline
Remove engine and transaxle assembly from vehicle downward. Separate engine and transaxle.
Preparation
1. Remove hood assembly. Refer to BL-12, "HOOD" .
2. Release fuel pressure. Refer to EC-49, "
FUEL PRESSURE RELEASE" (WITH EURO-OBD) or EC-562,
"FUEL PRESSURE RELEASE" (WITHOUT EURO-OBD).
3. Drain engine coolant from radiator. Refer to CO-9, "
Changing Engine Coolant" .
CAUTION:

Perform this step when the engine is cold.

Do not spill engine coolant on drive belt.
4. Remove the following parts.

LH and RH undercovers

Front road wheels and tyres

Battery; Refer to SC-4, "BATTERY" .

Drive belt; Refer to EM-13, "DRIVE BELTS" .

Air duct and air cleaner case assembly; Refer to EM-16, "AIR CLEANER AND AIR DUCT" .

Alternator; Refer to SC-13, "CHARGING SYSTEM" .

Radiator and radiator cooling fan assembly; Refer to CO-12, "RADIATOR" .
5. Disconnect engine room harness from the engine side and set it aside for easier work.
6. Disconnect all vacuum hoses and air hoses connected to vehicle side at engine side.
Engine Room LH
1. Disconnect fuel feed hoses, and plug them to prevent fuel from draining. Refer to EM-34, "FUEL INJEC-
TOR AND FUEL TUBE" .
2. Disconnect heater hoses, and install plugs them to prevent engine coolant from draining. Refer to CO-23,
"THERMOSTAT AND WATER CONTROL VALVE" .
3. Disconnect clutch operating cylinder from transaxle, and move it aside. Refer to CL-12, "
OPERATING
CYLINDER" .
4. Disconnect shift and select cable from transaxle. Refer to MT-16, "
CONTROL LINKAGE" .
5. Disconnect B terminal harness of starter motor. Refer to SC-23, "
STARTING SYSTEM" .
Engine Room RH
1. Remove engine coolant reservoir tank. Refer to CO-12, "RADIATOR" .
2. Remove A/C compressor with piping connected from engine. Temporarily secure it on vehicle side with a
rope to avoid putting load on it. Refer to ATC-144, "
Removal and Installation of Compressor" .
3. Remove power steering oil pump with piping connected from engine. Temporarily secure it on vehicle side
with a rope to avoid putting load on it. Refer to PS-37, "
HYDRAULIC LINE" .
Vehicle Underbody
1. Remove exhaust front tube. Refer to EX-2, "EXHAUST SYSTEM" .
2. Remove transaxle joint bolts which pierce at oil pan (upper) lower rear side. Refer to MT-19, "
TRAN-
SAXLE ASSEMBLY" .
3. Remove front wheel sensor (LH and RH) for ABS from steering knuckle. Refer to BRC-46, "
WHEEL SEN-
SORS" .
4. Remove brake caliper assembly with piping connected from steering knuckle. Temporarily secure it on the
vehicle side with a rope to avoid load on it. Refer to BR-27, "
FRONT DISC BRAKE" .
5. Remove LH and RH drive shafts from steering knuckle. Refer to FAX-11, "
FRONT DRIVE SHAFT" .
Removal
1. Install engine slingers into front-left of cylinder head and rear-right of cylinder head.

EC-1038
[YD (WITH EURO-OBD)]
TROUBLE DIAGNOSIS

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
EGR VOL CON/V [step]×

Indicates the EGR volume control value
computed by the ECM according to the
input signals.

The opening becomes larger as the
value increases.
INT/A VOLUME [mg/]

The intake air volume computed from the
mass air flow sensor signal is displayed.
BARO SEN [kPa]××

The barometric pressure (determined by
the signal voltage from the absolute
pressure sensor built into the ECM) is
displayed.
INT/M PRES SE [kPa]

Turbocharger boost (determined by the
signal voltage from the turbocharger
boost sensor) is displayed.
CYL COUNT [1/2/3/4]

The cylinder being injected is displayed.
1 ... Cylinder No.1 is injected.
2 ... Cylinder No.2 is injected.
3 ... Cylinder No.3 is injected.
4 ... Cylinder No.4 is injected.
SET SW
[ON/OFF]×

Indicates [ON/OFF] condition from SET/
COAST switch signal.
RESUME/ACC SW
[ON/OFF]×

Indicates [ON/OFF] condition from
RESUME/ACCELERATE switch signal.
CANCEL SW
[ON/OFF]×

Indicates [ON/OFF] condition from CAN-
CEL switch signal.
MAIN SW
[ON/OFF]×

Indicates [ON/OFF] condition from MAIN
switch signal.
Voltage [V]
Voltage, frequency, duty cycle or pulse
width measured by the probe.Only “#” is displayed if item is
unable to be measured.
Figures with “#”s are temporary
ones.
They are the same figures as an
actual piece of data which was
just previously measured. [Hz] or
[%] Frequency [msec], [Hz] or
[%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMONITOR ITEMECM
INPUT
SIGNALMAIN
SIG-
NALSCONDITION SPECIFICATION
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
POWER BAL-
ANCE

Engine: After warming up, idle the
engine.

A/C switch: OFF

Shift lever: Neutral position

Cut off each injector signal one at
a time using CONSULT-IIEngine runs rough or dies.

Harness and connectors

Compression

Fuel injector
COOLING FAN *

Ignition switch: ON

Operate the cooling fan at LOW,
HI speed and turn OFF using
CONSULT-II.Cooling fan moves at LOW, HI
speed and stops.
Harness and connector

Cooling fan motor

Cooling fan relay

TROUBLE DIAGNOSIS
EC-1409
[YD (WITHOUT EURO-OBD)]
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EC

NOTE:
Any monitored item that does not match the vehicle being diagnosed is deleted from the display automatically.
ACTIVE TEST MODE
EGR VOL CON/V [step]×

Indicates the EGR volume control value
computed by the ECM according to the
input signals.

The opening becomes larger as the
value increases.
INT/A VOLUME [mg/]

The intake air volume computed from the
mass air flow sensor signal is displayed.
BARO SEN [kPa]××

The barometric pressure (determined by
the signal voltage from the absolute pres-
sure sensor built into the ECM) is dis-
played.
INT/M PRES SE [kPa]

Turbocharger boost (determined by the
signal voltage from the turbocharger
boost sensor) is displayed.
CYL COUNT [1/2/3/4]

The cylinder being injected is displayed.
1 ... Cylinder No.1 is injected.
2 ... Cylinder No.2 is injected.
3 ... Cylinder No.3 is injected.
4 ... Cylinder No.4 is injected.
SET SW
[ON/OFF]×

Indicates [ON/OFF] condition from SET/
COAST switch signal.
RESUME/ACC SW
[ON/OFF]×

Indicates [ON/OFF] condition from
RESUME/ACCELERATE switch signal.
CANCEL SW
[ON/OFF]×

Indicates [ON/OFF] condition from CAN-
CEL switch signal.
MAIN SW
[ON/OFF]×

Indicates [ON/OFF] condition from MAIN
switch signal.
Voltage [V]
Voltage, frequency, duty cycle or pulse
width measured by the probe.Only “#” is displayed if item is
unable to be measured.
Figures with “#”s are temporary
ones.
They are the same figures as an
actual piece of data which was
just previously measured. [Hz] or
[%] Frequency [msec], [Hz] or
[%]
DUTY-HI
DUTY-LOW
PLS WIDTH-HI
PLS WIDTH-LOWMONITOR ITEMECM
INPUT
SIGNALMAIN
SIG-
NALSCONDITION SPECIFICATION
TEST ITEM CONDITION JUDGEMENT CHECK ITEM (REMEDY)
POWER BAL-
ANCE

Engine: After warming up, idle the
engine.

A/C switch: OFF

Shift lever: Neutral position

Cut off each injector signal one at
a time using CONSULT-IIEngine runs rough or dies.

Harness and connectors

Compression

Fuel injector
COOLING FAN *

Ignition switch: ON

Operate the cooling fan at LOW,
HI speed and turn OFF using
CONSULT-II.Cooling fan moves at LOW, HI
speed and stops.
Harness and connector

Cooling fan motor

Cooling fan relay

BRC-1
BRAKE CONTROL SYSTEM
F BRAKES
CONTENTS
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SECTION BRC
A
B
BRC

BRAKE CONTROL SYSTEM
ABS
PRECAUTIONS .......................................................... 4
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” .................................................................. 4
Precautions for Brake System .................................. 4
Precautions for Brake Control .................................. 4
PREPARATION ........................................................... 5
Special Service Tools ............................................... 5
SYSTEM DESCRIPTION ............................................ 6
System Diagram ....................................................... 6
ABS Function ........................................................... 6
EBD Function ........................................................... 6
Fail-Safe Function .................................................... 6
ABS, EBD SYSTEM .............................................. 6
Hydraulic Circuit Diagram ........................................ 7
CAN COMMUNICATION ............................................ 8
System Description .................................................. 8
CAN Communication Unit ........................................ 8
TYPE 1/TYPE 2 .................................................... 8
TYPE 3 .................................................................. 9
TYPE 7/TYPE 8 .................................................. 10
TROUBLE DIAGNOSIS ............................................ 12
How to Proceed With Diagnosis ............................. 12
BASIC CONCEPT ............................................... 12
DIAGNOSIS FLOWCHART ................................ 13
ASKING COMPLAINTS ...................................... 14
EXAMPLE OF DIAGNOSIS SHEET ................... 14
Component Parts Location ..................................... 15
Schematic .............................................................. 16
Wiring Diagram — ABS — ..................................... 17
LHD MODEL ....................................................... 17
RHD MODEL ....................................................... 21
Control Unit Input/Output Signal Standard ............. 25
REFERENCE VALUE FROM CONSULT-II ......... 25
CONSULT- II Functions .......................................... 26
CONSULT-II MAIN FUNCTION ........................... 26
CONSULT-II BASIC OPERATION PROCEDURE
... 26SELF-DIAGNOSIS .............................................. 28
DATA MONITOR ................................................. 30
ACTIVE TEST ..................................................... 32
Correct and Quick Diagnosis .................................. 34
DIAGNOSIS PRECAUTIONS ............................. 34
Basic Inspection ..................................................... 35
BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
LEAKS, AND BRAKE PADS INSPECTION ......... 35
BASIC INSPECTION 2 POWER SYSTEM TER-
MINAL LOOSENESS AND BATTERY INSPEC-
TION .................................................................... 35
BASIC INSPECTION 3 ABS WARNING LAMP ... 35
Inspection 1: Wheel Sensor System ....................... 36
INSPECTION PROCEDURE .............................. 36
Inspection 2: ABS Actuator and Electric Unit (Con-
trol Unit) 1 ............................................................... 38
Inspection 3: ABS Actuator and Electric Unit (Con-
trol Unit) Power Supply and Ground Circuit ............ 38
Inspection 4: ABS Actuator Relay or ABS Motor
Relay Power System .............................................. 39
Inspection 5: ABS Actuator and Electric Unit (Con-
trol Unit) 2 ............................................................... 40
Inspection 6: G Sensor System .............................. 41
Inspection 7: CAN Communication System ............ 43
Symptom 1: ABS Works Frequently ....................... 43
Symptom 2: Unexpected Pedal Reaction ............... 44
Symptom 3: Longer Stopping Distance .................. 44
Symptom 4: ABS Does Not Work ........................... 45
Symptom 5: Pedal Vibration and ABS Operation
Noise ...................................................................... 45
WHEEL SENSORS ................................................... 46
Removal and Installation ........................................ 46
REMOVAL ........................................................... 46
INSTALLATION ................................................... 46
G SENSOR ................................................................ 47
Removal and Installation ........................................ 47
REMOVAL ........................................................... 47
INSTALLATION ................................................... 47

BRC-2 SENSOR ROTOR ...................................................... 48
Removal and Installation ........................................ 48
REMOVAL ........................................................... 48
INSTALLATION .................................................... 48
ABS ACTUATOR AND ELECTRIC UNIT (ASSEM-
BLY) ........................................................................... 49
Removal and Installation ........................................ 49
ESP/TCS/ABS
PRECAUTIONS ......................................................... 50
Precautions for Supplemental Restraint System
(SRS) “AIR BAG” and “SEAT BELT PRE-TEN-
SIONER” ................................................................. 50
Precautions for Brake System ................................ 50
Precautions for Brake Control ................................ 50
PREPARATION ......................................................... 51
Special Service Tools ............................................. 51
ON-VEHICLE SERVICE ............................................ 52
Adjustment of Steering Angle Sensor Neutral Posi-
tion .......................................................................... 52
SYSTEM DESCRIPTION .......................................... 53
System Diagram ..................................................... 53
ESP Function .......................................................... 53
TCS Function .......................................................... 53
ABS Function .......................................................... 54
EBD Function ......................................................... 54
Fail-Safe Function .................................................. 54
ESP/ TCS SYSTEM ............................................ 54
ABS, EBD SYSTEM ............................................ 54
Hydraulic Circuit Diagram ....................................... 55
CAN COMMUNICATION ........................................... 56
System Description ................................................. 56
CAN Communication Unit ....................................... 56
TYPE 4/TYPE 5 ................................................... 56
TYPE 6 ................................................................ 57
TYPE 9 ................................................................ 58
TROUBLE DIAGNOSIS ............................................ 60
How to Proceed With Diagnosis ............................. 60
BASIC CONCEPT ............................................... 60
DIAGNOSIS FLOWCHART ................................. 61
ASKING COMPLAINTS ....................................... 62
EXAMPLE OF DIAGNOSIS SHEET .................... 62
Component Parts and Harness Connector Location ... 63
Schematic ............................................................... 64
Wiring Diagram —ESP/TCS/ABS— ..................... 65
LHD MODEL ........................................................ 65
RHD MODEL ....................................................... 71
Control Unit Input/Output Signal Standard .............. 77
REFERENCE VALUE FROM CONSULT-II ......... 77
CONSULT-II Functions ........................................... 79
CONSULT-II MAIN FUNCTION ........................... 79
CONSULT-II BASIC OPERATION PROCEDURE
... 79
SELF-DIAGNOSIS .............................................. 81
DATA MONITOR .................................................. 83
ACTIVE TEST ..................................................... 86
For Fast and Accurate Diagnosis ........................... 88PRECAUTIONS FOR DIAGNOSIS ..................... 88
Basic Inspection ...................................................... 89
BASIC INSPECTION 1 BRAKE FLUID AMOUNT,
LEAKS, AND BRAKE PADS INSPECTION ......... 89
BASIC INSPECTION 2 POWER SYSTEM TER-
MINAL LOOSENESS AND BATTERY INSPEC-
TION .................................................................... 89
BASIC INSPECTION 3 ABS WARNING LAMP,
ESP OFF INDICATOR LAMP, SLIP INDICATOR
LAMP AND BRAKE WARNING LAMP INSPEC-
TION .................................................................... 90
Inspection 1 Wheel Sensor System ........................ 91
INSPECTION PROCEDURE ............................... 91
Inspection 2 Engine System ................................... 93
Inspection 3 ESP/TCS/ABS Control Unit System ... 93
Inspection 4 Pressure Sensor and the Circuit
between Pressure Sensor and ESP/TCS/ABS Con-
trol Unit. ................................................................... 93
Inspection 5 Steering Angle Sensor and Circuit
between Steering Angle Sensor and ESP/TCS/ABS
Control Unit. ............................................................ 95
Inspection 6 Yaw Rate/Side G sensor and the Circuit
between Yaw Rate/Side G sensor and ESP/TCS/
ABS Control Unit. .................................................... 97
Inspection 7 Solenoid Valve, ESP Switch-over Sole-
noid Valve and Circuit ............................................. 98
Inspection 8 Actuator Motor, Motor Relay and Circuit
.101
Inspection 9 Actuator Relay and Circuit ................103
Inspection 10 Stop Lamp Switch and Circuit .........105
Inspection 11 ESP/TCS/ABS Control Unit Power
Supply Circuit ........................................................105
Inspection 12 When “EMERGENCY BRAKE” is
indicated in the Self-Diagnostic Results ................107
Inspection 13 When “ST ANG SEN SIGNAL” is Indi-
cated in the Self-Diagnostic Results .....................107
Inspection 14 Brake Fluid Level of Reservoir Tank,
Communication Circuit between ESP/TCS/ABS
Control Unit and Brake Fluid Level Warning Switch .108
Inspection 15 CAN Communication Circuit, ESP/
TCS/ABS Control Unit and Steering Angle Sensor .109
Component Check ................................................109
ESP OFF SWITCH ............................................109
ESP RELAY BOX ...............................................109
ESP ACTUATOR ...............................................110
Symptom 1: ABS Works Frequently .....................112
Symptom 2: Unexpected Pedal Reaction .............113
Symptom 3: Longer Stopping Distance .................113
Symptom 4: ABS Does Not Work .........................113
Symptom 5: Pedal Vibration and ABS Operation
Noise .....................................................................113
Symptom 6: ESP OFF Indicator Lamp Does Not Illu-
minate ...................................................................114
Symptom 7: SLIP Indicator Lamp Does Not Illumi-
nate .......................................................................114
Symptom 8: Vehicle Jerks During ESP/TCS/ABS
Control ..................................................................115

BRC-4
[ABS]
PRECAUTIONS

[ABS]PRECAUTIONSPFP:00001
Precautions for Supplemental Restraint System (SRS) “AIR BAG” and “SEAT
BELT PRE-TENSIONER”
EFS005X6
The Supplemental Restraint System such as “AIR BAG” and “SEAT BELT PRE-TENSIONER”, used along
with a front seat belt, helps to reduce the risk or severity of injury to the driver and front passenger for certain
types of collision. Information necessary to service the system safely is included in the SRS and SB section of
this Service Manual.
WARNING:

To avoid rendering the SRS inoperative, which could increase the risk of personal injury or death
in the event of a collision which would result in air bag inflation, all maintenance must be per-
formed by an authorized NISSAN/INFINITI dealer.

Improper maintenance, including incorrect removal and installation of the SRS, can lead to per-
sonal injury caused by unintentional activation of the system. For removal of Spiral Cable and Air
Bag Module, see the SRS section.

Do not use electrical test equipment on any circuit related to the SRS unless instructed to in this
Service Manual. SRS wiring harnesses can be identified by yellow and/or orange harnesses or
harness connectors.
Precautions for Brake SystemEFS004GX

Recommended fluid is brake fluid “DOT 3” or “DOT 4”.

Do not reuse drained brake fluid.

Be careful not to splash brake fluid on painted areas such as body. If brake fluid is splashed, wipe it off
and flush area with water immediately.

Do not use mineral oils such as gasoline or kerosene to clean. They will ruin rubber parts and cause
improper operation.

Using a flare nut torque wrench, securely tighten brake tube
flare nuts.

Brake system is an important safety part. If a brake fluid leak is
detected, always disassemble the affected part. If a malfunction
is detected, replace part with a new one.

Before working, turn ignition switch OFF and disconnect har-
ness connectors of ABS actuator and electric unit (control unit)
or battery cable from negative terminal.

When installing brake piping, be sure to check torque.
Precautions for Brake ControlEFS004FV

During ABS operation, brake pedal lightly vibrates and a mechanical noise may be heard. This is normal.

Just after starting vehicle after ignition switch ON, brake pedal may vibrate or motor operating noise may
be heard from engine compartment. This is a normal status of operation check.

Stopping distance may be longer than that of vehicles without ABS when vehicle drives on rough, gravel,
or snow-covered (fresh, deep snow) roads.

When an malfunction is indicated by ABS or another warning lamp, collect all necessary information from
customer (what symptoms are present under what conditions) and check for simple causes before start-
ing diagnostic servicing. Besides electrical system inspection, check booster operation, brake fluid level,
and oil leaks.

If tyre size and type are used in an improper combination, or brake pads are not Genuine NISSAN parts,
stopping distance or steering stability may deteriorate.

If there is a radio, antenna, or antenna lead-in wire (including wiring) near control module, ABS function
may have a malfunction.

If aftermarket parts (car stereo, CD player, etc.) Have been installed, check for incidents such as harness
pinches, open circuits, and improper wiring.
SBR820BA

TROUBLE DIAGNOSIS
BRC-25
[ABS]
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BRC

Control Unit Input/Output Signal StandardEFS004GA
REFERENCE VALUE FROM CONSULT-II
CAUTION:
The display shows the control unit calculation data, so a normal value might be displayed even in the
event the output circuit (harness) is open or short - circulated.
Note 1: Confirm tyre pressure is normal.
Note 2: ABS warning lamp ON/OFF timing
ON: For approximately 1 second after the ignition switch is turned on or when an malfunction is detected.
OFF: Approximately 1 second after the ignition switch is turned on (when system is normal).Monitor item Display ContentData monitor
Reference: Inspection
checklist
ConditionReference values
for normal opera-
tion
FR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSORWheel speed calcu-
lated using signals
from all four wheel
sensorsVehicle stopped 0 km/h (0 MPH)
BRC-36, "
Inspection 1:
Wheel Sensor System"While driving (Note 1)Nearly matches
the speedometer
display (± 10% or
less)
DOCILE G-SEN. 1
DOCILE G-SEN. 2
(4WD model)Fore-and-aft G
detected by G sensorWhen vehicle is stopped on
level groundOFF
BRC-41, "
Inspection 6: G
Sensor System"When G sensor is tilted toward
the front with G sensor mount-
ing bolt removedON
ABS IN SOL
ABS OUT SOLOperation status of all
solenoidsWhen the actuator solenoid
operates or during a fail-safeON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the actuator relay oper-
ates and the actuator solenoid
does not operateOFF
STOP LAMP SW Brake pedal operationBrake pedal depressed ON
Stop lamp switch circuit
Brake pedal not depressed OFF
MOTOR RELAYMotor and motor relay
operation statusWhen the motor relay and
motor are operatingON
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
When the motor relay and
motor are not operatingOFF
ACTUATOR RELAYActuator relay opera-
tion statusWhen the actuator relay is
operatingOFF
When the actuator relay is not
operatingON
ABS WARN LAMPABS warning lamp on
condition (Note 2)ABS warning lamp ON ONBRC-35, "
BASIC
INSPECTION 3 ABS
WARNING LAMP"ABS warning lamp OFF OFF
BATTERY VOLTBattery voltage sup-
plied to ABS actuator
and electric unit (con-
trol unit) Ignition switch ON 10 - 16VBRC-38, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EBD FAIL SIG
ABS FAIL SIGFail signal statusEBD Fail
ABS FailON
EBD system
ABS system EBD normal
ABS normalOFF
EBD SIGNAL
ABS SIGNALEBD operation
ABS operationEBD active
ABS activeON
EBD not active
ABS not activeOFF

TROUBLE DIAGNOSIS
BRC-29
[ABS]
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BRC

Display Item List
Suspect Systems Malfunction detecting condition Inspection system
RR RH SENSOR-1 When the circuit in the rear RH wheel sensor is open.
BRC-36, "
Inspection 1:
Wheel Sensor Sys-
tem"(Note 1) RR LH SENSOR-1 When the circuit in the rear LH wheel sensor is open.
FR RH SENSOR-1 When the circuit in the front RH wheel sensor is open.
FR LH SENSOR-1 When the circuit in the front LH wheel sensor is open.
FR LH SENSOR-2When the circuit in the front LH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR RH SENSOR-2When the circuit in the rear RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
FR RH SENSOR-2When the circuit in the front RH wheel sensor is short-circuited.
Or when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
RR LH SENSOR-2When the circuit in the rear LH wheel sensor is short-circuited. Or
when the sensor power voltage is outside the standard. When
the distance between the wheel sensor and sensor rotor is too
large and the sensor pulse cannot be recognized by the control
unit.
MAIN RELAYWhen the control unit detects an malfunction in the actuator relay
system.BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH IN ABS SOLWhen the control unit detects an malfunction in the front left inlet
solenoid system.
BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
FR LH OUT ABS SOLWhen the control unit detects an malfunction in the front left out-
let solenoid system.
RR RH IN ABS SOLWhen the control unit detects an malfunction in the rear right inlet
solenoid system.
RR RH OUT ABS SOLWhen the control unit detects an malfunction in the rear right out-
let solenoid system.
FR RH IN ABS SOLWhen the control unit detects an malfunction in the front right
inlet solenoid system.
FR RH OUT ABS SOLWhen the control unit detects an malfunction in the front right out-
let solenoid system.
RR LH IN ABS SOLWhen the control unit detects an malfunction in the rear left inlet
solenoid system.
RR LH OUT ABS SOLWhen the control unit detects an malfunction in the rear left outlet
solenoid system.
LOW POWER VOLTAGEWhen the ABS actuator and electric unit power voltage is lower
than normal. BRC-38, "
Inspection 3:
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
EMERGENCY BRAKEWhen the ABS actuator and electric unit malfunctions (pressure
increase is too much or too little).BRC-40, "
Inspection 5:
ABS Actuator and Elec-
tric Unit (Control Unit) 2"
ABS CONTROLLERWhen there is an internal malfunction in the ABS actuator and
electric unit.BRC-38, "
Inspection 2:
ABS Actuator and Elec-
tric Unit (Control Unit) 1"

BRC-30
[ABS]
TROUBLE DIAGNOSIS

Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning
lamp turns on. Check that ABS warning lamp turns off while driving vehicle at 30 km/h (19 MPH) or more for
approximately 1 minute according to self-diagnosis procedure. In addition, if wheel sensor 2 is displayed for
wheels, check wheel sensor circuit and also check control unit power voltage.
Note 2: When malfunctions are detected in several systems, including CAN communication system [U1000],
troubleshoot CAN communication system.
DATA MONITOR
Operation Procedure
1. Touch “ABS”, “DATA MONITOR” in order on the CONSULT-II screen.
2. Return to the Monitor Item Selection screen, and touch “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”. Refer to the following information.
3. When “START” is touched, the data monitor screen is displayed.
Display Item List
CAN COMM CIRCUIT When there is an malfunction in the CAN communication system.
BRC-43, "Inspection 7:
CAN Communication
System" (Note 2)
PUMP MOTOR During actuator motor operation with ON, when actuator motor
turns OFF or when control line for actuator motor relay is open.BRC-39, "
Inspection 4:
ABS Actuator Relay or
ABS Motor Relay Power
System"
G - SENSOR
(4WD model)Decel G-sensor is malfunctioning, or signal line of Decel G-sen-
sor is open or shorted. BRC-41, "Inspection 6:
G Sensor System"
Suspect Systems Malfunction detecting condition Inspection system
Item (Unit)SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU
FR LH SENSOR
[km/h]×××Wheel speed calculated by front
LH wheel sensor signal is dis-
played.
FR RH SENSOR
[(km/h]×××Wheel speed calculated by front
RH wheel sensor signal is dis-
played.
RR LH SENSOR
[km/h]×××Wheel speed calculated by Rear
LH wheel sensor signal is dis-
played.
RR RH SENSOR
[km/h]×××Wheel speed calculated by Rear
RH wheel sensor signal is dis-
played.
DECEL G-SEN 1
(ON/OFF) (4WD model)×××Decel G-sensor 1 (ON/OFF) status
is displayed.
DECEL G-SEN 2
(ON/OFF) (4WD model)×××Decel G-sensor 2 (ON/OFF) status
is displayed.
FR LH IN SOL
(ON/OFF)–××Front left inlet ABS solenoid valve
(ON/OFF) status is displayed.
FR LH OUT SOL
(ON/OFF)–××Front left outlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR RH IN SOL
(ON/OFF)–××Rear right inlet ABS solenoid valve
(ON/OFF) status is displayed.
RR RH OUT SOL
(ON/OFF)–××Rear right outlet ABS solenoid
valve (ON/OFF) status is dis-
played.

TROUBLE DIAGNOSIS
BRC-31
[ABS]
C
D
E
G
H
I
J
K
L
MA
B
BRC

×: Applicable
–: Not applicable FR RH IN SOL
(ON/OFF)–××Front right inlet ABS solenoid
valve (ON/OFF) status is dis-
played.
FR RH OUT SOL
(ON/OFF)–××Front right outlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR LH IN SOL
(ON/OFF)–××Rear left rear inlet ABS solenoid
valve (ON/OFF) status is dis-
played.
RR LH OUT SOL
(ON/OFF)–××Rear left outlet ABS solenoid valve
(ON/OFF) status is displayed.
STOP LAMP SW
(ON/OFF)×××Stop lamp switch (ON/OFF) status
is displayed.
MOTOR RELAY
(ON/OFF)–××ABS motor relay (ON/OFF) condi-
tion is displayed.
ACTUATOR RLY
(ON/OFF)–××ABS actuator relay (ON/OFF) sta-
tus is displayed.
ABS WARN LAMP
(ON/OFF)–××ABS warning lamp (ON/OFF) sta-
tus is displayed.
BATTERY VOLT
(V )×××The voltage supplied to the ABS
control unit is displayed.
EBD SIGNAL
(ON/OFF)––×EBD operation (ON/OFF) status is
displayed.
ABS SIGNAL
(ON/OFF)––×ABS operation (ON/OFF) status is
displayed.
EBD FAIL SIG
(ON/OFF)––×EBD fail-safe signal (ON/OFF) sta-
tus is displayed.
ABS FAIL SIG
(ON/OFF)––×ABS fail-safe signal (ON/OFF) sta-
tus is displayed. Item (Unit)SELECT MONITOR ITEM
Remarks
ECU INPUT
SIGNALSMAIN SIGNALSSELECTION
FROM MENU