2001 INFINITI QX4 relay

SELF-DIAGNOSTIC RESULTS MODENBBR0097S02
Diagnostic item Diagnostic item is detected when ... Reference Page
FR RH SENSOR*1
[OPEN]ICircuit for front right wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR LH SENSOR*1
[OPEN]ICircuit for front left wheel sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR RH SENSOR*1
[OPEN]ICircuit for rear right sensor is open.
(An abnormally high input voltage is entered.)BR-56
RR LH SENSOR*1
[OPEN]ICircuit for rear left sensor is open.
(An abnormally high input voltage is entered.)BR-56
FR RH SENSOR*1
[SHORT]ICircuit for front right wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
FR LH SENSOR*1
[SHORT]ICircuit for front left wheel sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR RH SENSOR*1
[SHORT]ICircuit for rear right sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
RR LH SENSOR*1
[SHORT]ICircuit for rear left sensor is shorted.
(An abnormally low input voltage is entered.)BR-56
ABS SENSOR*1
[ABNORMAL SIGNAL]ITeeth damage on sensor rotor or improper installation of wheel sensor.
(Abnormal wheel sensor signal is entered.)BR-56
FR RH IN ABS SOL
[OPEN, SHORT]ICircuit for front right inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH IN ABS SOL
[OPEN, SHORT]ICircuit for front left inlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR RH OUT ABS SOL
[OPEN, SHORT]ICircuit for front right outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
FR LH OUT ABS SOL
[OPEN, SHORT]ICircuit for front left outlet solenoid valve is open.
(An abnormally low output voltage is entered.)BR-59
RR IN ABS SOL
[OPEN, SHORT]ICircuit for rear inlet solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
RR OUT ABS SOL
[OPEN, SHORT]ICircuit for rear out solenoid valve is shorted.
(An abnormally high output voltage is entered.)BR-59
ABS ACTUATOR RELAY
[ABNORMAL]IActuator solenoid valve relay is ON, even if control unit sends off signal.
IActuator solenoid valve relay is OFF, even if control unit sends on signal.BR-59
ABS MOTOR RELAY
[ABNORMAL]ICircuit for ABS motor relay is open or shorted.
ICircuit for actuator motor is open or shorted.
IActuator motor relay is stuck.BR-61
BATTERY VOLT
[VB-LOW]IPower source voltage supplied to ABS control unit is abnormally low.
BR-63
CONTROL UNITIFunction of calculation in ABS control unit has failed. BR-68
G SENSOR*2
[ABNORMAL]IG sensor circuit is open or shorted.
BR-65
*1: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This does not
indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warning lamp also illu-
minates when the ignition switch is turned ON. In this case, drive the vehicle at speeds greater than 30 km/h (19 MPH) for approxi-
mately 1 minute as specified in ªSELF-DIAGNOSIS PROCEDUREº, BR-41. Check to ensure that the ABS warning lamp goes out while
the vehicle is being driven.
*2: 4WD models onlyGI
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ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Inspection Procedure (Cont'd)
BR-45

DATA MONITOR MODENBBR0097S05
MONITOR ITEM CONDITION SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR RH SENSOR
RR LH SENSORDrive vehicle.
(Each wheel is rotating.)Wheel speed signal
(Almost the same speed as speedometer.)
STOP LAMP SW Brake is depressed.Depress the pedal: ON
Release the pedal: OFF
G-SWITCHHVehicle is driven.
Vehicle is stopped.
Brake is applied.During sudden braking while driving on high  roads (asphalt
roads, etc.): OFF
While vehicle is stopped or during constant-speed driving: ON
FR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR IN SOL
RR OUT SOL1. Drive vehicle at speeds
over 30 km/h (19 MPH) for at
least 1 minute.
2. Engine is running.Operating conditions for each solenoid valve are indicated. ABS
is not operating: OFF
MOTOR RELAYABS is not operating: OFF
ABS is operating: ON
ACTUATOR RELAY
Ignition switch is ON or
engine is running.Ignition switch ON (Engine stops): OFF
Engine running: ON
WARNING LAMPABS warning lamp is turned on: ON
ABS warning lamp is turned off: OFF
BATTERY VOLT Power supply voltage for control unit
ABS OPER SIGABS is not operating: OFF
ABS is operating: ON
H: 4WD model only
ACTIVE TEST MODENBBR0097S06
TEST ITEM CONDITION JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
RR SOLENOID
Engine is running.Brake fluid pressure control operation
IN SOL OUT SOL
UP (Increase): OFF OFF
KEEP (Hold): ON OFF
DOWN (Decrease): ON ON
ABS MOTORABS actuator motor
ON: Motor runs (ABS motor relay ON)
OFF: Motor stops (ABS motor relay OFF)
ABS OPER SIGIgnition switch is ON or
engine is running.ON: Set ABS OPER SIG ªONº (ABS is operating.)
OFF: Set ABS OPER SIG ªOFFº (ABS is not operating.)
G SWITCHHIgnition switch is ON.G SWITCH (G SENSOR)
ON: Set G SWITCH MONITOR ªONº (G switch circuit is
closed.)
OFF: Set G SWITCH MONITOR ªOFFº (G switch circuit is
open.)
H: 4WD models only
NOTE:
Active test will automatically stop ten seconds after the test starts. (TEST IS STOPPED monitor shows ON.)
ON BOARD DIAGNOSTIC SYSTEM DESCRIPTIONABS
CONSULT-II Inspection Procedure (Cont'd)
BR-48

Malfunction Code/Symptom ChartNBBR0101
Code No. (No. of warning lamp flashes) Malfunctioning part Reference Page
12 Self-diagnosis could not detect any malfunctions. Ð
17*4 G sensor and circuit BR-65
18*1 Sensor rotor BR-56
21*1 Front right sensor (open-circuit) BR-56
22*1 Front right sensor (short-circuit) BR-56
25*1 Front left sensor (open-circuit) BR-56
26*1 Front left sensor (short-circuit) BR-56
31*1 Rear right sensor (open-circuit) BR-56
32*1 Rear right sensor (short-circuit) BR-56
35*1 Rear left sensor (open-circuit) BR-56
36*1 Rear left sensor (short-circuit) BR-56
41 Actuator front right outlet solenoid valve BR-59
42 Actuator front right inlet solenoid valve BR-59
45 Actuator front left outlet solenoid valve BR-59
46 Actuator front left inlet solenoid valve BR-59
55 Actuator rear outlet solenoid valve BR-59
56 Actuator rear inlet solenoid valve BR-59
57*2 Power supply (Low voltage) BR-63
61*3 Actuator motor or motor relay BR-61
63 Solenoid valve relay BR-59
71 Control unit BR-68
Warning lamp stays on when ignition
switch is turned ON.Control unit power supply circuit
Warning lamp bulb circuit
Control unit or control unit connector
Solenoid valve relay stuck
Power supply for solenoid valve relay coilBR-74
ABS works frequently Ð BR-69
Unexpected pedal action Ð BR-69
Long stopping distance Ð BR-70
ABS does not work Ð BR-71
Pedal vibration and noise Ð BR-71
Warning lamp does not come on
when ignition switch is turned ON.Fuse, warning lamp bulb or warning lamp circuit
Control unitBR-72
Vehicle vibrates excessively when ABS is
operating.ABS control unit to TCM circuit BR-77
*1: If one or more wheels spin on a rough or slippery road for 40 seconds or more, the ABS warning lamp will illuminate. This does not
indicate a malfunction. Only in the case of the short-circuit (Code Nos. 26, 22, 32 and 36), after repair the ABS warning lamp also illu-
minates when the ignition switch is turned ON. In this case, drive the vehicle at speeds greater than 30 km/h (19 MPH) for approxi-
mately 1 minute as specified in ªSELF-DIAGNOSIS PROCEDUREº, BR-41. Check to ensure that the ABS warning lamp goes out while
the vehicle is being driven.
*2: The trouble code ª57º, which refers to a low power supply voltage, does not indicate that the ABS control unit is malfunctioning. Do
not replace the ABS control unit with a new one.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTIONABS
Malfunction Code/Symptom Chart
BR-54

ABS Actuator Solenoid Valve or Solenoid Valve
Relay
DIAGNOSTIC PROCEDURE=NBBR0103Malfunction code No. 41, 45, 55, 42, 46, 56, 63
1 INSPECTION START
Solenoid valve relay inspection
SBR488E
©GO TO 2.
2 CHECK FUSIBLE LINK
Check 40A fusible linkc. For fusible link layout, refer to EL-16, ªPOWER SUPPLY ROUTINGº.
Is fusible link OK?
Ye s©GO TO 3.
No©GO TO 6.
3 CHECK CONNECTOR
1. Disconnect connector from ABS actuator and electric unit. Check terminals for damage or loose connection. Then
reconnect connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 4.
No©INSPECTION END
4 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND CIRCUIT
Refer to ªABS ACTUATOR AND ELECTRIC UNIT GROUNDº in ªGround Circuit Checkº, BR-53.
Is ground circuit OK?
Ye s©GO TO 5.
No©Repair harness or connector.
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TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
ABS Actuator Solenoid Valve or Solenoid Valve Relay
BR-59

5 CHECK SOLENOID VALVE POWER SUPPLY CIRCUIT
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector E111 (body side) terminal 18 and ground.
SBR489E
Does battery voltage exist?
Ye s©Replace ABS actuator and electric unit.
No©Check the following.
If NG, repair harness or connectors.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fusible link
6 REPLACE FUSIBLE LINK
Replace fusible link.
Does the fusible link blow out when ignition switch is turned ON?
Ye s©GO TO 7.
No©INSPECTION END
7 CHECK SOLENOID VALVE RELAY POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect battery cable and ABS actuator and electric unit connector.
2. Check continuity between ABS actuator and electric unit connector E111 (body side) terminal 18 and ground.
SBR490E
Continuity should not exist.
Does continuity exist?
Ye s©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fusible link
No©Replace ABS actuator and electric unit.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
ABS Actuator Solenoid Valve or Solenoid Valve Relay (Cont'd)
BR-60

Motor Relay or Motor
DIAGNOSTIC PROCEDURE=NBBR0104Malfunction code No. 61
1 INSPECTION START
ABS motor relay inspection
SBR491E
©GO TO 2.
2 CHECK FUSIBLE LINK
Check 40A fusible linkd. For fusible link layout, refer to EL-16, ªPOWER SUPPLY ROUTINGº.
Is fusible link OK?
Ye s©GO TO 3.
No©GO TO 6.
3 CHECK CONNECTOR
1. Disconnect ABS actuator and electric unit connector. Check terminals for damage or loose connection. Then reconnect
connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s©GO TO 4.
No©INSPECTION END
4 CHECK ABS ACTUATOR AND ELECTRIC UNIT GROUND CIRCUIT
Refer to ªABS ACTUATOR AND ELECTRIC UNIT GROUNDº in ªGround Circuit Checkº, BR-53.
Is ground circuit OK?
Ye s©GO TO 5.
No©Repair harness or connector.
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TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Motor Relay or Motor
BR-61

5 CHECK MOTOR RELAY POWER SUPPLY CIRCUIT
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector E111 (body side) terminal 17 and ground.
SBR492E
Does battery voltage exist?
Ye s©Replace ABS actuator and electric unit.
No©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fusible link
6 REPLACE FUSIBLE LINK
Replace fusible link.
Does the fusible link blow out when ignition switch is turned ON?
Ye s©GO TO 7.
No©INSPECTION END
7 CHECK ABS ACTUATOR MOTOR POWER SUPPLY CIRCUIT FOR SHORT
1. Disconnect battery cable and ABS actuator and electric unit connector.
2. Check continuity between ABS actuator and electric unit connector E111 (body side) terminal 17 and ground.
SBR493E
Continuity should not exist.
Does continuity exist?
Ye s©Check the following.
If NG, repair harness or connector.
IHarness connector E111
IHarness for open or short between ABS actuator and electric unit and fusible link
No©Replace ABS actuator and electric unit.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMSABS
Motor Relay or Motor (Cont'd)
BR-62

System ChartNBEC0013
Input (Sensor) ECM Function Output (Actuator)
ICamshaft position sensor (PHASE)
ICrankshaft position sensor (REF)
IMass air flow sensor
IEngine coolant temperature sensor
IHeated oxygen sensor 1 (front)
IIgnition switch
IThrottle position sensor
IClosed throttle position switch*3
IPark/neutral position (PNP) switch
IAir conditioner switch
IKnock sensor
IIntake air temperature sensor
IAbsolute pressure sensor
IEVAP control system pressure sensor*1
IBattery voltage
IPower steering oil pressure switch
IVehicle speed sensor
IFuel tank temperature sensor*1
ICrankshaft position sensor (POS)
IHeated oxygen sensor 2 (rear)*2
ITCM (Transmission control module)
IRefrigerant pressure sensor
IElectrical load
IFuel level sensor*1Fuel injection & mixture ratio control Injectors
Electronic ignition system Power transistor
Idle air control system IACV-AAC valve
Fuel pump control Fuel pump relay
On board diagnostic system MIL (On the instrument panel)
Swirl control valve controlSwirl control valve control solenoid
valve
Power valve control VIAS control solenoid valve
Heated oxygen sensor 1 heater (front) con-
trolHeated oxygen sensor 1 heater
(front)
Heated oxygen sensor 2 heater (rear) controlHeated oxygen sensor 2 heater
(rear)
EVAP canister purge flow controlEVAP canister purge volume con-
trol solenoid valve
Air conditioning cut control Air conditioner relay
ON BOARD DIAGNOSIS for EVAP systemIEVAP canister vent control valve
IVacuum cut valve bypass valve
*1: These sensors are not used to control the engine system. They are used only for the on board diagnosis.
*2: This sensor is not used to control the engine system under normal conditions.
*3: This switch will operate in place of the throttle position sensor to control EVAP parts if the sensor malfunctions.GI
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ENGINE AND EMISSION CONTROL OVERALL SYSTEM
System Chart
EC-27