2005 NISSAN NAVARA control unit

TROUBLE DIAGNOSIS
BRC-17
[ABS]
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CONSULT- II FunctionsEFS005TT
CONSULT-II MAIN FUNCTION
In a diagnosis function (main function), there are “SELF-DIAG RESULTS”, “DATA MONITOR”, “CAN DIAG
SUPPORT MNTR”, “ACTIVE TEST”, “FUNCTION TEST”, “ECU PART NUMBER”.
CONSULT-II BASIC OPERATION PROCEDURE
1. Touch “ABS” in “SELECT SYSTEM” screen.
2. Select required diagnostic location from “SELECT DIAG MODE”
screen.
Diagnostic
test modeFunction Reference
SELF-DIAG
RESULTSSelf-diagnostic results can be read and erased quickly.BRC-18, "
Self-Diagnosis"
DATA MONI-
TORInput/Output data in the ABS actuator and electric unit (control unit) can be read.BRC-20, "Data Monitor"
CAN DIAG
SUPPORT
MNTRThe results of transmit/receive diagnosis of communication can be read.LAN-15, "CAN Diagnostic
Support Monitor"
ACTIVE
TESTDiagnostic Test Mode in which CONSULT-II drives some actuators apart from
the ABS actuator and electric unit (control unit) and also shifts some parameters
in a specified range.BRC-21, "Active Test"
FUNCTION
TESTPerformed by CONSULT-II instead of a technician to determine whether each
system is “OK” or “NG”.Separate volume “CON-
SULT-II OPERATION MAN-
UAL (FUNCTION TEST)”
ECU PART
NUMBERABS actuator and electric unit (control unit) part number can be read. —
BCIA0030E
BCIA0031E

BRC-18
[ABS]
TROUBLE DIAGNOSIS
Self-Diagnosis
EFS005TU
OPERATION PROCEDURE
1. Turn ignition switch OFF.
2. Connect CONSULT-II and CONSULT-II CONVERTER to data link connector.
3. Turn ignition switch ON.
4. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
5. After stopping vehicle, with engine running, touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG
RESULTS” in order on CONSULT-II screen.
CAUTION:
If “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turn on the
ignition switch, “ABS” might not be displayed in the “SELECT SYSTEM” screen. In this case,
repeat the operation from step 1.
6. The self-diagnostic results are displayed. (Touch “PRINT” to print out self-diagnostic results, If necessary.)
lCheck ABS warning lamp if “NO FAILURE” is displayed.
7. Perform the appropriate inspection from display item list, and repair or replace the malfunctioning compo-
nent. Refer toBRC-18, "
Display Item List".
8. Start engine and drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute.
CAUTION:
When the wheel sensor malfunctions, after inspecting the wheel sensor system, the ABS warning
lamp and brake warning lamp will not turn off even when the system is normal unless the vehicle
is driving at 30 km/h (19MPH) or more for approximately 1 minute.
ERASE MEMORY
1. Turn ignition switch OFF.
2. Start engine and touch “START (NISSAN BASED VHCL)”, “ABS”, “SELF-DIAG RESULTS”, “ERASE
MEMORY” in order on CONSULT-II screen to erase the error memory.
If “ABS” is not indicated, go toGI-50, "
CONSULT-II Data Link Connector (DLC) Circuit".
CAUTION:
If the error memory is not erased, re-perform the operation from step 4.
3. Perform self-diagnosis again, and make sure that diagnostic memory is erased.
4. Drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute as the final inspection, and make
sure that the ABS warning lamp turn off.
DISPLAY ITEM LIST
Self-diagnostic item Malfunction detecting condition Check system
RR RH SENSOR-1 Circuit of rear RH wheel sensor is open.
BRC-24, "
Inspection 1
Wheel Sensor System"
(Note 1) RR LH SENSOR-1 Circuit of rear LH wheel sensor is open.
FR RH SENSOR-1 Circuit of front RH wheel sensor is open.
FR LH SENSOR-1 Circuit of front LH wheel sensor is open.
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.
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.
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.
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.

TROUBLE DIAGNOSIS
BRC-19
[ABS]
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BRC
Note 1: After completing repairs of shorted sensor circuit, when ignition switch is turned ON, ABS warning lamp turns on. Make sure 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 errors are detected in several systems, including CAN communication system [U1000], troubleshoot CAN communication
circuit. Refer toBRC-28, "
Inspection 4 CAN Communication Circuit". BATTERY VOLTAGE
[MALFUNCTION]ABS actuator and electric unit (control unit) power voltage is too low.BRC-28, "
Inspection 5
ABS Actuator and Elec-
tric Unit (Control Unit)
Power Supply and
Ground Circuit"
CONTROLLER FAILURE Internal malfunction of ABS actuator and electric unit (control unit)BRC-26, "
Inspection 2
ABS Actuator and Elec-
tric Unit (Control Unit)"
PUMP MOTORDuring actuator motor operation with ON, when actuator motor turns
OFF or when control line for actuator motor relay is open.BRC-26, "
Inspection 3
ABS Actuator Relay or
ABS Motor Relay Cir-
cuit"During actuator motor operation with OFF, when actuator motor
turns ON or when control line for relay is shorted to ground.
ABS SENSOR
[MALFUNCTION SIGNAL]Wheel sensor input is malfunction.BRC-24, "
Inspection 1
Wheel Sensor System"
(Note 1)
FR LH IN ABS SOLWhen the control unit detects an error in the front LH inlet solenoid
circuit.
BRC-26, "
Inspection 3
ABS Actuator Relay or
ABS Motor Relay Cir-
cuit"
FR LH OUT ABS SOLWhen the control unit detects an error in the front LH outlet solenoid
circuit.
FR RH IN ABS SOLWhen the control unit detects an error in the front RH inlet solenoid
circuit.
FR RH OUT ABS SOLWhen the control unit detects an error in the front RH outlet solenoid
circuit.
RR LH IN ABS SOLWhen the control unit detects an error in the rear LH inlet solenoid
circuit.
RR LH OUT ABS SOLWhen the control unit detects an error in the rear LH outlet solenoid
circuit.
RR RH IN ABS SOLWhen the control unit detects an error in the rear RH inlet solenoid
circuit.
RR RH OUT ABS SOLWhen the control unit detects an error in the rear RH outlet solenoid
circuit.
ACTUATOR RLY When the control unit detects an error in the actuator relay circuit.
CAN COMM CIRCUIT
[U1000]When there is an error in the CAN communications.BRC-28, "
Inspection 4
CAN Communication
Circuit"(Note 2) Self-diagnostic item Malfunction detecting condition Check system

BRC-20
[ABS]
TROUBLE DIAGNOSIS
Data Monitor
EFS005TV
OPERATION PROCEDURE
1. Touch “START (NISSAN BASED VHCL)”, “ABS”, “DATA MONITOR” in order on CONSULT-II screen.
CAUTION:
When “START (NISSAN BASED VHCL)” is touched immediately after starting engine or turning on
ignition switch, “ABS” might not be displayed in “SELECT SYSTEM” screen. In this case, repeat
the operation from step 1.
2. At the monitor item selection screen, touch one of the item “ECU INPUT SIGNALS”, “MAIN SIGNALS” or
“SELECTION FROM MENU”.
3. Touch “START” to proceed to the data monitor screen.
DISPLAY ITEM LIST
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-circuited.
E:ECU INPUT SIGNALS M:MAIN SIGNALS S:SELECTION FROM MENU
SELECT
MONITOR
ITEMMonitor item Display contentData monitor
ConditionReference value in
normal operation
E, M, SFR LH SENSOR
FR RH SENSOR
RR LH SENSOR
RR RH SENSORWheel speed0 [km/h] Vehicle stopped
Nearly matches the speed-
ometer display (±10% or
less)Vehicle running
(Note 1)
E, M, S STOP LAMP SW Brake pedal operationBrake pedal depressed ON
Brake pedal not depressed OFF
E, M, S BATTERY VOLTBattery voltage supplied to the ABS
actuator and electric unit (control
unit)Ignitionswitch ON 10–16V
M, SFR RH IN SOL
FR RH OUT SOL
FR LH IN SOL
FR LH OUT SOL
RR RH IN SOL
RR RH OUT SOL
RR LH IN SOL
RR LH OUT SOLOperation status of all solenoid
valveActuator (solenoid valve) is
active (“Active Test ”with
CONSULT-II) or actuator
relay is inactive (in fail-safe
mode).ON
When the actuator (sole-
noid valve) is not active
and actuator relay is active
(ignition switch ON).OFF
M, S MOTOR RELAYMotor and motor relay operation
statusWhen the motor relay and
motor are operatingON
When the motor relay and
motor are not operatingOFF
M, S ACTUATOR RLY Actuator relay operation statusWhen the actuator relay is
operatingON
When the actuator relay is
not operatingOFF
M, S ABS WARN LAMPABS warning lamp status
(Note 2)When ABS warning lamp is
ON.ON
When ABS warning lamp is
OFF.OFF
S EBD WARN LAMP Brake warning lamp status (Note 2)Brake warning lamp ON ON
Brake warning lamp OFF OFF
S EBD SIGNAL EBD operationEBD active ON
EBD not active OFF

TROUBLE DIAGNOSIS
BRC-23
[ABS]
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BRC
For Fast and Accurate DiagnosisEFS005TX
PRECAUTIONS FOR DIAGNOSIS
lBefore performing diagnosis, always read precautions. Refer toBRC-17, "CONSULT- II Functions".
lAfter diagnosis is finished, be sure to erase memory. Refer toBRC-18, "ERASE MEMORY".
lWhen checking continuity and voltage between units, be sure to check for disconnection, looseness,
bend, or collapse of connector terminals. If any malfunction is found, repair or replace connector termi-
nals.
lFor intermittent symptoms, possible cause is malfunction in harness, harness connector, or terminals.
Move harness, harness connector, and terminals to check for poor connections.
lIf a circuit tester is used for check, be careful not to forcibly extend any connector terminal.
lABS system electrically controls brake operation and engine output. Following symptoms may be caused
by normal operations:
Basic InspectionEFS005TY
BASIC INSPECTION 1 BRAKE FLUID LEVEL, LEAKS, AND BRAKE PADS
1. Check fluid level in the brake reservoir tank. If fluid level is low, refill brake fluid.
2. Check brake tube and around ABS actuator and electric unit (control unit) for leaks. If leakage or seepage
is found, check the following items.
lIf ABS actuator and electric unit (control unit) connection is loose, tighten brake tube to the specified
torque and re-conduct the leak inspection to make sure there are no leakage.
lIf there is damage to the connection flare nut or ABS actuator and electric unit (control unit) screw,
replace the damaged part and re-conduct the leak inspection to make sure there are no leakage.
lIf there is leakage or seepage at any location other than ABS actuator and electric unit (control unit)
connection, wipe away leakage or seepage with clean cloth. Then inspect again and confirm than there
is on leakage.
lIf there is leakage from ABS actuator and electric unit (control unit), wipe away leakage or seepage with
clean cloth. Then inspect again. If there is leakage or seepage, replace ABS actuator and electric unit
(control unit).
CAUTION:
ABS actuator and electric unit (control unit) body cannot be disassembled.
3. Check brake pad degree of wear. Refer toBR-24, "
PAD WEAR INSPECTION"in “Front Disc Brake” and
BR-32, "
Lining Thickness Inspection"in “Rear Drum Brake”.
BASIC INSPECTION 2 POWER SYSTEM TERMINAL LOOSENESS AND BATTERY INSPECTION
Make sure battery positive cable, negative cable and ground connection are not loose. In addition, check the
battery voltage to make sure it has not dropped and alternator is normal.
Symptom Symptom description Result
Motor operation noiseThis is noise of motor inside ABS actuator and electric unit (control unit). Slight
noise may occur during ABS operation.
Normal
Just after engine starts, motor operating noise may be heard. This is a normal
status of the system operation check.
System operation check noiseWhen engine starts, slight “click” noise may be heard from engine compart-
ment. This is normal and is part of system operation check.Normal
ABS operation
(Longer stopping distance)When driving on roads with a low coefficient of friction, such as snowy roads
or gravel roads, the stopping distance is sometimes longer for vehicles
equipped with ABS. Therefore, when driving on such roads, drive at a suffi-
ciently reduced speed to be safe.Normal

BRC-24
[ABS]
TROUBLE DIAGNOSIS
BASIC INSPECTION 3 ABS WARNING LAMP AND BRAKE WARNING LAMP INSPECTION
ON and OFF Timing for ABS Warning Lamp, Brake Warning Lamp
´:ON –:OFF
Note 1:Brake warning lamp will turn on in case of operating parking brake (switch turned on) or of a actuating brake fluid level switch
(brake fluid is insufficient).
Note 2:After starting engine, turn OFF.
Check the following items when unsuitable for an above condition.
lABS warning lamp: Refer toBRC-28, "Inspection 4 CAN Communication Circuit".
lBrake waning lamp: Refer toBRC-28, "Inspection 4 CAN Communication Circuit",BRC-30, "Inspection 6
Brake Fluid Level Switch Circuit",BRC-32, "Inspection 7 Parking Brake Switch Circuit".
If malfunction is not found, refer toBRC-33, "
Inspection 8 Warning lamp system".
Inspection 1 Wheel Sensor SystemEFS005TZ
Check each part according to CONSULT-II self-diagnostic results, and then identify the parts to be replaced.
CAUTION:
Check each part between wheel sensor terminals.
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed in self-diagnosis display items?
YES >> GO TO 2.
NO >> INSPECTION END
2.CHECK TYRE
Check air pressure, wear and size.
Are air pressure, wear and size within standard values?
YES >> GO TO 3.
NO >> Adjust air pressure, or replace tyre.
Condition ABS warning lampBrake warning lamp
[Note 1]Remarks
Ignition SW OFF – — —
Approx. 2 seconds after ignition
switch is turned ON´´[Note 2] —
Approx. 2 seconds later after ignition
switch ON–´[Note 2]Go out 2 seconds after ignition
switch is turned ON.
ABS error´—There is an ABS actuator and
electric unit (control unit) error.
(Power, ground or system mal-
function)
EBD error´´—
Self-diagnostic results
FR RH SENSOR-1,-2
FR LH SENSOR- 1,-2
RR RH SENSOR-1,-2
RR LH SENSOR-1,- 2
ABS SENSOR [MALFUNCTION SIGNAL]

TROUBLE DIAGNOSIS
BRC-25
[ABS]
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3.CHECK SENSOR AND SENSOR ROTOR
lCheck sensor rotor for damage.
lCheck wheel sensor for damage, disconnection or looseness.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace the malfunctioning component.
4.CHECK CONNECTOR
1. Turn ignition switch OFF and disconnect ABS actuator and electric unit (control unit) connector E63 and
malfunctioning wheel sensor connector E66 (FR - LH), E77 (FR - RH), C10 (RR - LH) or C11 (RR - RH).
Check terminal to see if it is deformed, disconnected, loose, etc., and repair or replace it if any malfunction
condition is found.
2. Reconnect connectors and check that interference with other parts has not cut wheel sensor cables, drive
vehicle at 30 km/h (19 MPH) or more for approximately 1minute, and perform self-diagnosis.
OK or NG
OK >> Connector terminal contact is loose, damaged, open or shorted.
NG >> GO TO 5.
5.CHECK WHEEL SENSOR HARNESS
1. Turn ignition switch OFF and disconnect wheel sensor connec-
tor E66 (FR - LH), E77 (FR - RH), C10 (RR - LH) or C11 (RR -
RH) and ABS actuator and electric unit (control unit) connector
E63.
2. Check continuity between terminals. (Also check continuity
when steering wheel is turned right and left and when sensor
harness inside wheel well is moved.)
OK or NG
OK >> GO TO 6.
NG >> Repair or replace harness and connector that have malfunction.
SFIA3206E
Power supply circuit Signal circuit Ground circuit
WheelABS C/U
(E63)Wheel sensorABS C/U
(E63)Wheel sensorABS C/U
(Signal)Ground
Front RH 34 1 33 2 34, 33
— Front LH 45 1 46 2 45, 46
Rear RH 43 1 42 2 43, 42
Rear LH 36 1 37 2 36, 37
Power supply circuit : Continuity should exist.
Signal circuit : Continuity should exist.
Ground circuit : Continuity should not exist.

BRC-26
[ABS]
TROUBLE DIAGNOSIS
6.CHECK WHEEL SENSOR
1. Replace wheel sensor that resulted in malfunction by self-diagnosis.
2. Reconnect connectors, drive vehicle at 30 km/h (19 MPH) or more for approximately 1 minute, and then
perform self-diagnosis.
Is above displayed on self-diagnosis display?
OK >> Wheel sensor has malfunction.
NG >>
lReplace ABS actuator and electric unit (control unit).
lPerform to self-diagnosis again, and make sure that the result shows “NO DTC IS DETECTED.
FURTHER TESTING MAY BE REQUIRED”.
Inspection 2 ABS Actuator and Electric Unit (Control Unit)EFS005U0
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed in self-diagnosis display items?
YES >> Replace ABS actuator and electric unit (control unit). Perform ABS actuator and electric unit (con-
trol unit) self-diagnosis again.
NO >> INSPECTION END
Inspection 3 ABS Actuator Relay or ABS Motor Relay CircuitEFS005U1
INSPECTION PROCEDURE
1.CHECK SELF-DIAGNOSTIC RESULTS
Check self-diagnostic results.
Is above displayed in self-diagnosis item?
YES >> GO TO 2.
NO >> INSPECTION END
Self-diagnostic results
CONTROLLER FAILURE
Self-diagnostic results
FR LH IN ABS SOL
FR LH OUT ABS SOL
RR RH IN ABS SOL
RR RH OUT ABS SOL
FR RH IN ABS SOL
FR RH OUT ABS SOL
RR LH IN ABS SOL
RR LH OUT ABS SOL
PUMP MOTOR
ACTUATOR RLY