ABS INFINITI QX4 2005 Factory Service Manual

TROUBLE DIAGNOSIS
TF-47
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Revision: October 20052005 QX56
How to Erase Self-diagnostic Results
1. Perform applicable inspection of malfunctioning item and then repair or replace.
2. Start engine and select “SELF-DIAG RESULTS” mode for “ALL MODE AWD/4WD” with CONSULT-II.
3. Touch “ERASE” on CONSULT-II screen to erase DTC memory.
CAUTION:
If memory cannot be erased, perform applicable diagnosis.
DATA MONITOR MODE
Operation Procedure
1. Perform “CONSULT-II SETTING PROCEDURE”. Refer to TF-44, "CONSULT-II SETTING PROCEDURE"
.
2. Touch “DATA MONITOR”.
3. Select from “SELECT MONITOR ITEM”, screen of data monitor mode is displayed.
NOTE:
When malfunction is detected, CONSULT-II performs REAL-TIME DIAGNOSIS.
Also, any malfunction detected while in this mode will be displayed at real time.
Display Item List
×: Standard –: Not applicable
Monitored item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELEC-
TION FROM
MENU
VHCL/S SEN·FR [km/h] or [mph]×–×Wheel speed calculated by ABS actuator and
electric unit (control unit).
Signal input with CAN communication line.
VHCL/S SEN·RR [km/h] or [mph]×–×Wheel speed calculated by TCM.
Signal input with CAN communication line.
ENGINE SPEED [rpm]×–×Engine speed calculated by ECM.
Signal input with CAN communication line.
THRTL POS SEN [V]×–×Accelerator pedal position (APP) sensor sig-
nal voltage is displayed.
Signal input with CAN communication line.
FLUID TEMP SE [V]×–×Transfer fluid temperature sensor signal volt-
age is displayed.
BATTERY VOLT [V]×–×Power supply voltage for transfer control unit.
2WD SWITCH [ON/OFF]×–×4WD shift switch status is displayed.
AUTO SWITCH [ON/OFF]×–×4WD shift switch status is displayed.
LOCK SWITCH [ON/OFF]×–×4WD shift switch status is displayed.
(LOCK means 4H of 4WD shift switch.)
4L SW [ON/OFF]×–×4WD shift switch status is displayed.
(4L means 4LO of 4WD shift switch.)
N POSI SW TF [ON/OFF]×–×Neutral-4LO switch signal status is displayed.
ATP SWITCH [ON/OFF]×–×ATP switch signal status is displayed.
WAIT DETCT SW [ON/OFF]×–×Wait detection switch status is displayed.
LINE PRES SW [ON/OFF]×–×Line pressure switch status is displayed.
CL PRES SW [ON / OFF]×–×Clutch pressure switch status is displayed.
N POSI SW AT [ON/OFF]זדN” position signal of A/T PNP switch status
is displayed.
Signal input with CAN communication line.
R POSI SW AT [ON/OFF]זדR” position signal of A/T PNP switch status
is displayed.
Signal input with CAN communication line.

TF-48
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
P POSI SW AT [ON/OFF]זדP” position signal of A/T PNP switch status is
displayed.
Signal input with CAN communication line.
ABS OPER SW [ON/OFF]×–×ABS operation signal status is displayed.
Signal input with CAN communication line.
VDC OPER SW [ON/OFF]×–×VDC operation signal status is displayed.
Signal input with CAN communication line.
TCS OPER SW [ON/OFF]×–×TCS operation signal status is displayed.
Signal input with CAN communication line.
THROTTLE POSI [0.0/8] –××Thottle position status is displayed.
Signal input with CAN communication line.
4WD MODE [AUTO/LOCK/2WD/4L] –××Control status of 4WD recognized by transfer
control unit. (AUTO, 4H, 2WD or 4LO)
VHCL/S COMP [km/h] or [mph] –××Vehicle speed recognized by transfer control
unit.
COMP CL TORQ [kgm] –××Calculated torque recognized by transfer
control unit.
DUTY SOLENOID [%] –××Control value of clutch pressure solenoid.
2-4WD SOL [ON/OFF] –××Output condition to 2-4WD solenoid.
2-4WD SOL MON [ON/OFF] – –×Check signal for transfer control unit signal
output.
MOTOR RELAY [ON/OFF] –××Transfer motor relay signal status is dis-
played.
MOTOR RELAY MON [ON/OFF] – –×Check signal for transfer control unit signal
output.
4WD FAIL LAMP [ON/OFF] –××Control status of 4WD warning lamp is dis-
played.
2WD IND [ON/OFF] – –×Control status of 4WD shift indicator lamp
(2WD indicator lamp) is displayed.
AUTO IND [ON/OFF] – –×Control status of 4WD shift indicator lamp
(2WD and AUTO indicator lamp) is displayed.
LOCK IND [ON/OFF] – –×Control status of 4WD shift indicator lamp
(2WD, AUTO and Lock indicator) is dis-
played.
4L IND [ON/OFF] – –×Control status of 4LO indicator lamp is dis-
played.
ATP IND [ON/OFF] – –×Control status of ATP warning lamp is dis-
played.
SHIFT POS SW1 [ON/OFF]×–×Actuator position switch 1 (Low) signal status
is displayed.
SHIFT POS SW2 [ON/OFF]×–×Actuator position switch 2 (high) signal status
is displayed.
SHIFT ACT1 [ON/OFF] –××Output condition to actuator motor (clock-
wise)
SHIFT AC MON1 [ON/OFF]×–×Check signal for transfer control unit signal
output
SHIFT ACT2 [ON/OFF] –××Output condition to actuator motor (counter-
clockwise)
SHIFT AC MON2 [ON/OFF]×–×Check signal for transfer control unit signal
output Monitored item (Unit)Monitor item selection
Remarks
ECU INPUT
SIGNALSMAIN
SIGNALSSELEC-
TION FROM
MENU

TROUBLE DIAGNOSIS
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Diagnostic Procedure
1. Warn up engine.
2. Move A/T selector lever to “P” position.
3. Turn 4WD shift switch to “2WD” position.
4. Turn ignition switch “ON” and “OFF” at least twice, and then turn ignition switch “OFF”.
5. Turn 4WD shift switch to “AUTO” position.
6. Turn ignition switch “ON”. (Do not start engine.)
7. 4WD warning lamp ON.
If 4WD warning lamp does not turn ON, refer to TF-121, "
4WD Warning Lamp Does Not Turn ON" .
8. Move A/T selector lever to “R” position.
9. Turn 4WD shift switch to “2WD”, “AUTO” and “2WD” in order.
10. Move A/T selector lever to “D” position.
11. Turn 4WD shift switch to “LOCK”, “AUTO” and “LOCK” in order.
12. Move A/T selector lever to “N” position.
13. Turn 4WD shift switch to “AUTO” position.
14. Move A/T selector lever to “P” position.
15. Read the flickering of 4WD warning lamp.
Refer to TF-51, "
Judgement Self-diagnosis" .
Judgement Self-diagnosis
When a malfunction is detected, the malfunction route is indicated by flickering of the 4WD warning lamp.
PDIA0227E
Flickering pattern or
flickering conditionItems Malfunction Check items
2Output shaft revolution
signal (from TCM)

Malfunction is detected in output shaft revolution signal
that is output from TCM through CAN communication.

Improper signal is input while driving.TF-58, "
Output Shaft
Revolution Signal
(TCM)"
3Clutch pressure sole-
noid signal
Proper voltage is not applied to clutch pressure solenoid
valve due to open or short circuit.TF-86, "Clutch Pres-
sure Solenoid"
4 2-4WD solenoid signal
Proper voltage is not applied to 2-4WD solenoid valve
due to open or short circuit.TF-91, "2-4WD Sole-
noid"
5 Transfer motor
Motor does not operate properly due to open or short cir-
cuit in transfer motor or motor relay.TF-95, "Tran s fe r Mo to r"
6Vehicle speed signal
(from ABS)

Malfunction is detected in vehicle speed signal that is
output from ABS actuator and electric unit (control unit)
through CAN communication.

Improper signal is input while driving.TF-58, "
Vehicle Speed
Sensor (ABS)"
7 CAN communication
Malfunction has been detected from CAN communica-
tion line.TF-113, "CAN Commu-
nication Line"
8 AD converter
AD converter system of transfer control unit is malfunc-
tioning.TF-54, "Power Supply
Circuit For Transfer
Control Unit"

TF-52
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
9Transfer fluid tempera-
ture

Signal voltage from fluid temperature sensor is abnor-
mally high (Transfer fluid temperature is abnormally low)
while driving.TF-102, "Transfer Fluid
Temperature"
10 Neutral-4LO switch
Improper signal from neutral-4LO switch is input due to
open or short circuit.TF-59, "Neutral-4LO
Switch"
11 Clutch pressure switch

Improper signal from clutch pressure switch is input due
to open or short circuit.

Malfunction occurs in clutch pressure switch or hydraulic
circuit.TF-105, "
Clutch Pres-
sure Switch"
12 Line pressure switch

Improper signal from line pressure switch is input due to
open or short circuit.

Malfunction occurs in line pressure switch or hydraulic
circuit.TF-108, "
Line Pressure
Switch"
13Engine speed signal
(from ECM)

Malfunction is detected in engine speed signal that is
output from ECM through CAN communication.

Improper signal is input while driving.TF-85, "
Engine Speed
Signal (ECM)"
14Throttle position sen-
sor (from ECM)

Malfunction is detected in accelerator pedal position sig-
nal that is output from ECM through CAN communica-
tion.

Signal voltage from accelerator pedal position sensor is
abnormally high or low.T F - 111 , "
Throttle Posi-
tion Signal (ECM)"
15 Power supply
Power supply voltage for transfer control unit is abnor-
mally low while driving.TF-54, "Power Supply
Circuit For Transfer
Control Unit"
16 4WD shift switch
More than two switch inputs are simultaneously detected
due to short circuit of 4WD shift switch.TF-62, "4WD Shift
Switch"
17ABS operation signal
(from ABS)

Malfunction is detected in ABS operation signal that is
output from ABS actuator and electric unit (control unit)
through CAN communication.T F - 111 , "ABS Operation
Signal (ABS)"
18 Wait detection switch
Improper signal from wait detection switch is input due to
open or short circuit.TF-66, "Wait Detection
Switch"
19 Actuator motor

Motor does not operate properly due to open or short cir-
cuit in actuator motor.

Malfunction is detected in the actuator motor. (When
4WD shift switch is operated and actuator motor is not
operated)

Malfunction is detected in transfer shift high relay and
transfer shift low relay.TF-70, "
Actuator
Motor", TF-54, "Power
Supply Circuit For
Transfer Control Unit"
20Actuator position
switch

Improper signal from actuator position switch is input
due to open or short circuit.

Malfunction is detected in the actuator position switch.TF-77, "
Actuator Posi-
tion Switch"
21 Actuator circuit

Transfer control device actuator circuit is shorted or
open. (Malfunctions are detected when motor relay cir-
cuit is open/shorted or relay transfer shift circuit is open/
shorted.)

Malfunction occurs in transfer control device drive circuit.TF-81, "
Transfer Con-
trol Device"

Malfunction is detected in transfer shut off relay.TF-54, "
Power Supply
Circuit For Transfer
Control Unit"
22VDC operation signal
(from VDC)

Malfunction is detected in VDC operation signal that is
output from ABS actuator and electric unit (control unit)
through CAN communication.TF-112, "VDC Opera-
tion Signal (ABS)"
23TCS operation signal
(from TCS)

Malfunction is detected in TCS operation signal that is
output from ABS actuator and electric unit (control unit)
through CAN communication.TF-112, "TCS Opera-
tion Signal (ABS)"
Flickering pattern or
flickering conditionItems Malfunction Check items

TROUBLE DIAGNOSIS
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Revision: October 20052005 QX56
CAUTION:

If “CAN communication” is displayed with other DTCs, first perform the trouble diagnosis for CAN communication line.

If “ABS operation signal”, “VDC operation signal" or “TCS operation signal" is displayed, first perform the trouble diag-
nosis for ABS system.

If “Output shaft revolution signal” is displayed, first perform the trouble diagnosis for A/T system.
NOTE:

If "actuator position switch" or “actuator circuit” is displayed, first erase self-diagnostic results. ("Actuator position switch" or “actua-
tor circuit” may be displayed after installing transfer control unit or transfer assembly.)

If “clutch pressure switch” or “line pressure switch” is displayed only while driving in reverse, check the continuity of “R” position on
A/T PNP switch. When there is nothing wrong with the electrical system, check the hydraulic system.
ERASE SELF-DIAGNOSIS

In order to make it easier to find the cause of hard-to-duplicate malfunctions, malfunction information is
stored into the control unit as necessary during use by the user. This memory is not erased no matter how
many times the ignition switch is turned ON and OFF.

However, this information is erased by turning ignition switch “OFF” after performing self-diagnostics or by
erasing the memory using the CONSULT-II.
24PNP switch signal
(from TCM)
When A/T PNP switch signal is malfunctioning or com-
munication error between the vehicles.TF-69, "PNP Switch
Signal (TCM)"
Repeats flickering
every 2 to 5 sec.— Circuits that the self-diagnosis covers have no malfunction. —
Repeats flickering
every 0.25 sec.Data erase display

Power supply failure of memory back-up.

Battery performance is poor.TF-54, "
Power Supply
Circuit For Transfer
Control Unit"
No flickeringPNP switch or 4WD
shift switch
PNP switch or 4WD shift switch circuit is shorted or
open.TF-69, "PNP Switch
Signal (TCM)", TF-62,
"4WD Shift Switch"
Flickering pattern or
flickering conditionItems Malfunction Check items

TF-58
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
Output Shaft Revolution Signal (TCM)EDS0 02 I6
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH TCM
Perform self-diagnosis with TCM. Refer to TF-50, "
SELF-DIAGNOSTIC PROCEDURE (WITH CONSULT-II)" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-54, "
TRANSFER CONTROL UNIT TERMINALS
AND REFERENCE VALUE" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with TCM again. Refer to TF-50, "
SELF-DIAGNOSTIC PROCEDURE
(WITH CONSULT-II)" .
Vehicle Speed Sensor (ABS)EDS0 02 I7
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-29, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-54, "
TRANSFER CONTROL UNIT TERMINALS
AND REFERENCE VALUE" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-29,
"SELF-DIAGNOSIS" .

TROUBLE DIAGNOSIS FOR SYSTEM
TF-111
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Revision: October 20052005 QX56
Throttle Position Signal (ECM)EDS002IM
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH ECM
Perform self-diagnosis with ECM. Refer to EC-130, "
SELF-DIAG RESULTS MODE" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with ECM again. Refer to EC-130, "
SELF-DIAG RESULTS MODE" .
ABS Operation Signal (ABS)EDS002IN
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-29, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-29,
"SELF-DIAGNOSIS" .

TF-112
TROUBLE DIAGNOSIS FOR SYSTEM
Revision: October 20052005 QX56
VDC Operation Signal (ABS)EDS002IO
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-29, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with ABS actuator electric unit (control unit) again. Refer to BRC-29,
"SELF-DIAGNOSIS" .
TCS Operation Signal (ABS)EDS002IP
DIAGNOSTIC PROCEDURE
1. CHECK DTC WITH ABS ACTUATOR AND ELECTRIC UNIT (CONTROL UNIT)
Perform self-diagnosis with ABS actuator and electric unit (control unit). Refer to BRC-29, "
SELF-DIAGNO-
SIS" .
Is any malfunction detected by self-diagnosis?
YES >> Check the malfunctioning system.
NO >> GO TO 2.
2. CHECK TRANSFER CONTROL UNIT
Check transfer control unit input/output signal. Refer to TF-36, "
Transfer Control Unit Input/Output Signal Ref-
erence Values" .
OK or NG
OK >> GO TO 3.
NG >> Check transfer control unit pin terminals for damage or loose connection with harness connector.
If any items are damaged, repair or replace damaged parts.
3. CHECK DTC
Perform the self-diagnosis, after driving a vehicle for a while.
OK or NG
OK >> Inspection End.
NG >> Perform self-diagnosis with ABS actuator and electric unit (control unit) again. Refer to BRC-29,
"SELF-DIAGNOSIS" .

FRONT WIPER AND WASHER SYSTEM
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Washer Tube Layout EKS00BE7
Removal and Installation of Wiper and Washer Switch EKS00BE8
REMOVAL
1. Remove steering column covers.
2. Remove wiper washer switch connector.
3. Pinch tabs at wiper and washer switch base and slide switch
away from steering column to remove.
INSTALLATION
Installation is in the reverse order of removal.
Removal and Installation of Washer Tank EKS00BE9
REMOVAL
1. Remove side washer tank screw.
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WKIA0071E
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