control unit NISSAN NAVARA 2005 Repair Workshop Manual

BRC-34
[ABS]
TROUBLE DIAGNOSIS
4.CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving.
OK or NG
OK >> Normal
NG >> Perform self-diagnosis. Refer toBRC-18, "
Self-Diagnosis".
Symptom 2: Unexpected Pedal ReactionEFS005U9
1.CHECK BRAKE PEDAL STROKE
Check brake pedal stroke. Refer toBR-6, "
Inspection and Adjustment".
Is the stroke too big?
YES >>lBleed air from brake piping. Refer toBR-11, "Bleeding Brake System".
lCheck brake pedal, brake booster, and master cylinder for mount play, looseness, brake sys-
tem fluid leakage, etc. Repair if necessary. Refer to Brake pedal:BR-8, "
COMPONENTS",
brake booster and master cylinder:BR-20, "
COMPONENTS".
NO >> GO TO 2.
2.CHECK FUNCTION
Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS. Check if braking force is
normal in this condition. Connect connector after inspection.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-33, "
Symptom 1: Excessive ABS Function Operation Frequency".
NG >> Check the following system. If any malfunction is found, repair or replace malfunctioning parts.
lBrake booster. Refer toBR-19, "BRAKE BOOSTER".
lHydraulic line. Refer toBR-12, "BRAKE TUBE AND HOSE".
lFront brake caliper. Refer toBR-24, "FRONT DISC BRAKE".
lRear wheel cylinder. Refer toBR-30, "REAR DRUM BRAKE".
Symptom 3: The Stopping Distance Is LongEFS005UA
CAUTION:
The stopping distance on slippery road surfaces might be longer with the ABS operating than when
the ABS is not operating.
1.CHECK FUNCTION
Turn ignition switch OFF. Disconnect ABS actuator and electric unit (control unit) connector to deactivate ABS.
In this condition, check stopping distance. After inspection, connect connector.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom 1. Refer to
BRC-33, "
Symptom 1: Excessive ABS Function Operation Frequency".
NG >>
lBleed air from the brake piping. Refer toBR-11, "Bleeding Brake System".
lCheck the following system. If any malfunction is found, repair or replace malfunctioning parts.
–Brake booster. Refer toBR-19, "BRAKE BOOSTER".
–Hydraulic line. Refer toBR-12, "BRAKE TUBE AND HOSE".
–Front brake caliper. Refer toBR-24, "FRONT DISC BRAKE".
–Rear wheel cylinder. Refer toBR-30, "REAR DRUM BRAKE".

TROUBLE DIAGNOSIS
BRC-35
[ABS]
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Symptom 4: ABS Function Does Not OperateEFS005UB
CAUTION:
ABS does not operate when speed is 10 km/h (6 MPH) or lower.
1.CHECK ABS WARNING LAMP DISPLAY
Make sure that the ABS warning lamp is turned off after the ignition switch is turned ON or when driving.
OK or NG
OK >> GO TO procedure 3 “CHECK WHEEL SENSOR AND SENSOR ROTOR” of symptom1. Refer to
BRC-33, "
Symptom 1: Excessive ABS Function Operation Frequency".
NG >> Perform self-diagnosis. Refer toBRC-18, "
Self-Diagnosis".
Symptom 5: Pedal Vibration or ABS Operation Sound OccursEFS005UC
CAUTION:
Under the following conditions, ABS is activated and vibration is felt when brake pedal is lightly
depressed (just place a foot on it). However, this is normal.
lWhen shifting gears
lWhen driving on slippery road
lDuring cornering at high speed
lWhen passing over bumps or grooves [at approximately 50 mm (1.97 in) or more]
lWhen pulling away just after starting engine [at approximately 10 km/h (6 MPH) or more]
1.SYMPTOM CHECK 1
Check if there is pedal vibration or operation noise when the engine is started.
Do symptoms occur?
YES >> GO TO 2.
NO >> Perform self-diagnosis. Refer toBRC-18, "
Self-Diagnosis".
2.SYMPTOM CHECK 2
Check symptoms when electrical component (headlamps, etc.) switches are operated.
Do symptoms occur?
YES >> Check if there is a radio, antenna, antenna lead wire, or wiring close to the control unit. If there is,
move it farther away.
NO >> GO TO procedure 3²CHECK WHEEL SENSOR AND SENSOR ROTOR²of symptom 1. Refer to
BRC-33, "
Symptom 1: Excessive ABS Function Operation Frequency".
Symptom 6: ABS Warning Lamp Indication Is Not NormalEFS005UD
NOTE:
Lighting condition of ABS warning lamp refer toBRC-24, "
BASIC INSPECTION 3 ABS WARNING LAMP AND
BRAKE WARNING LAMP INSPECTION".
1.CHECK COMBINATION METER INDICATION
Check the combination meter indication and operation. Refer toDI-13, "
Self-Diagnosis Mode of Combination
Meter".
OK or NG
OK >> GO TO 2.
NG >> Combination meter is malfunctioning. Check combination meter. Refer toDI-4, "
COMBINATION
METERS".

BRC-36
[ABS]
TROUBLE DIAGNOSIS
2.CHECK SELF-DIAGNOSTIC RESULTS
Check the self-diagnostic results of ABS actuator and electric unit (control unit). Refer toBRC-18, "
Self-Diag-
nosis".
OK or NG
OK >> GO TO procedure 1 of symptom 6.
NG >> Check the items indicated with self-diagnosis.

BRC-40
[ABS]
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
PFP:47660
Removal and InstallationEFS005UG
CAUTION:
lBefore servicing, disconnect battery cables.
lTo remove brake tube, use flare nut wrench to prevent flare nuts and brake tube from being dam-
aged. To install, use flare nut torque wrench.
lDo not apply excessive impact to ABS actuator and electric unit (control unit), such as dropping it.
lDo not remove and install actuator by holding harness.
lAfter work is completed, bleed air from brake tube and hose. Refer toBR-11, "Bleeding Brake Sys-
tem".
REMOVAL
1. Disconnect ABS actuator and electric unit (control unit) connector.
2. Loosen brake tube flare nuts, then remove brake tubes from ABS actuator and electric unit (control unit).
3. Remove ABS actuator and electric unit (control unit) bracket mounting bolts.
4. Remove ABS actuator and electric unit (control unit) from vehicle.
1. To rear 2. From master cylinder secondary
side3. To front left
4. From master cylinder primary side 5. To front right 6. ABS actuator and electric unit (con-
trol unit)
7. Harness connector
Refer to GI section for symbol marks in the figure.
SFIA3016E

ACTUATOR AND ELECTRIC UNIT (ASSEMBLY)
BRC-41
[ABS]
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INSTALLATION
Installation is the reverse order of removal.
NOTE:
After installing harness connector in the ABS actuator and electric unit (control unit), make sure connector is
securely locked.

ENGINE COOLANT
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3. Fill radiator and reservoir tank to the specified level.
lPour engine coolant through engine coolant filler neck
slowly of less than 2 (1-3/4 lmp qt) a minute to allow air
in system to escape.
lUse Genuine Nissan Anti-freeze Coolant (L250) or equiva-
lent in its quality. Refer toMA-14, "
RECOMMENDED FLU-
IDS AND LUBRICANTS".
lWhen engine coolant overflows air relief hole, install air relief
plug.
4. Warm up engine to normal operating temperature without radiator cap and reservoir tank cap installed.
lIf engine coolant overflows radiator filler hole and reservoir tank filler hole, install radiator cap
and reservoir tank cap.
5. Run engine at 3,000 rpm for 10 seconds and return to idle speed with radiator cap installed.
lRepeat two or three times.
CAUTION:
Watch engine coolant temperature gauge so as not to overheat the engine.
6. Stop engine and cool down to less than approximately 50°C(122°F).
lCool down using a fan to reduce the time.
lIf necessary, refill radiator up to filler neck with engine coolant.
7. Refill reservoir tank to MAX level line with engine coolant.
8. Repeat steps 3 through 6 two or more times with radiator cap installed until engine coolant level no longer
drops.
9. Check cooling system for leaks with engine running.
10. Warm up engine, and check for sound of engine coolant flow while running engine from idle up to 3,000
rpm with heater temperature controller set at several position between COOL and WARM.
lSound may be noticeable at heater unit.
11. Repeat step 10 three times.
12. If sound is heard, bleed air from cooling system by repeating steps 3 through 6 until engine coolant level
no longer drops.
FLUSHING COOLING SYSTEM
1. Fill radiator with water until water spills from the air relief hole, then close air relief plug. Fill radiator and
reservoir tank with water and reinstall radiator cap and reservoir tank cap.
2. Run engine and warm it up to normal operating temperature.
3. Rev engine two or three times under no-load.
4. Stop engine and wait until it cools down.
5. Drain water from the system. Refer toCO-8, "
DRAINING ENGINE COOLANT". Engine coolant capacity
(with reservoir tank at “MAX” level)
LHD models
: Approx. 9.9 (8-3/4 lmp qt)
RHD models
: Approx. 10.2 (9 lmp qt)
SMA182B
Reservoir tank capacity (at “MAX” level)
: 0.8 (3/4 lmp qt)
SMA412B

DI-1
DRIVER INFORMATION SYSTEM
K ELECTRICAL
CONTENTS
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SECTIONDI
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B
DI
DRIVER INFORMATION SYSTEM
PRECAUTION ............................................................ 3
Precautions for Supplemental Restraint System
(SRS)“AIRBAG”and“SEATBELTPRE-TEN-
SIONER” .................................................................. 3
Wiring Diagrams and Trouble Diagnosis .................. 3
COMBINATION METERS ........................................... 4
System Description .................................................. 4
UNIFIED METER CONTROL UNIT ...................... 4
POWER SUPPLY AND GROUND CIRCUIT ........ 4
SPEEDOMETER ................................................... 4
TACHOMETER ..................................................... 4
WATER TEMPERATURE GAUGE ........................ 4
FUEL GAUGE ....................................................... 5
ODO/TRIP METER ............................................... 5
TRIP COMPUTER ................................................ 5
ENGINE OIL MAINTENANCE INFORMATION..... 6
METER ILLUMINATION CONTROL ..................... 6
CLOCK .................................................................. 6
AMBIENT AIR TEMPERATURE INDICATION ...... 6
Component Parts and Harness Connector Location..... 7
Arrangement of Combination Meter ......................... 8
Internal Circuit .......................................................... 9
Wiring Diagram — METER — ................................ 10
Terminals and Reference Value for Combination
Meter ...................................................................... 12
Self-Diagnosis Mode of Combination Meter ........... 13
FUNCTION .......................................................... 13
OPERATION PROCEDURE ............................... 13
TEST ITEM ......................................................... 13
CONSULT-II Function (METER) ............................. 15
CONSULT-II BASIC OPERATION ....................... 15
SELF-DIAG RESULTS ........................................ 16
DATA MONITOR ................................................. 17
Trouble Diagnosis .................................................. 18
HOW TO PERFORM TROUBLE DIAGNOSIS ... 18
PRELIMINARY CHECK ...................................... 19
Symptom Chart ...................................................... 19
Power Supply and Ground Circuit Inspection ........ 19
Vehicle Speed Signal Inspection ............................ 20
Engine Speed Signal Inspection ............................ 21Engine Coolant Temperature Signal Inspection ..... 21
Fuel Level Sensor Signal Inspection ...................... 22
Ambient Sensor Signal Inspection .......................... 24
Fuel Gauge Fluctuates, Indicates Wrong Value, or
Varies ...................................................................... 25
Fuel Gauge Does Not Move to Full position ........... 25
DTC [U1000] CAN Communication Circuit ............. 26
DTC [B2205] Vehicle Speed Circuit ........................ 26
Electrical Components Inspection .......................... 27
FUEL LEVEL SENSOR UNIT CHECK ................ 27
AMBIENT SENSOR CHECK ............................... 27
Removal and Installation of Combination Meter ..... 27
WARNING LAMPS .................................................... 28
System Description ................................................. 28
OIL PRESSURE WARNING LAMP ..................... 28
Component Parts and Harness Connector Location... 28
Schematic ............................................................... 29
Wiring Diagram — WARN — .................................. 30
A/T MODELS ....................................................... 30
M/T MODELS ...................................................... 37
Oil Pressure Warning Lamp Stays Off (Ignition
Switch ON) ............................................................. 44
Oil Pressure Warning Lamp Does Not Turn Off (Oil
Pressure Is Normal) ................................................ 45
Oil Pressure Warning Lamp Keeps Blinking (Oil
Level Is Normal) ..................................................... 46
Component Inspection ............................................ 47
OIL PRESSURE SWITCH ................................... 47
OIL LEVEL SENSOR .......................................... 47
A/T INDICATOR ........................................................ 48
System Description ................................................. 48
Wiring Diagram — AT/IND — ................................. 49
A/T Indicator Does Not Illuminate ........................... 50
WARNING CHIME ..................................................... 51
System Description ................................................. 51
POWER SUPPLY AND GROUND CIRCUIT ....... 51
LIGHT WARNING CHIME ................................... 51
KEY REMINDER WARNING CHIME .................. 51
LOW-FUEL WARNING CHIME ........................... 51
SEAT BELT WARNING CHIME ........................... 52

DI-4
COMBINATION METERS
COMBINATION METERS
PFP:24814
System DescriptionEKS00L8E
UNIFIED METER CONTROL UNIT
lSpeedometer, odo/trip meter, tachometer, fuel gauge and water temperature gauge are controlled by the
unified meter control unit, which is built into the combination meter.
lWarning lamp and indicator lamp are controlled by signals drawn from each unit with CAN communication
and components connected directly to the combination meter.
lOdo/trip meter display is included in the combination meter, which displays odometer, trip-meter, vehicle
information (trip computer, engine oil maintenance information)
*and A/T position*.
*: Vehicles with each system only.
lClock display is included in the combination meter, which displays current time, ambient air temperature*
and 4WD indicator*.
*: Vehicles with each system only.
lUnified meter control unit corresponds a CONSULT-II function (self-diagnosis results and data monitor).
lThe following items can be checked during self-diagnosis mode.
–Sweep of gauges pointer
–Present gauge values
–Odo/trip meter display and clock display segments
–Condition of warning lamps/indicator lamps controlled by unified meter control unit
–Battery voltage
–Driver's seat belt buckle switch status
–CPU status of unified meter control unit
POWER SUPPLY AND GROUND CIRCUIT
Power is supplied at all times
lthrough 10A fuse [No.19, located in the fuse block (J/B)]
lto combination meter terminal 3.
With the ignition switch in the ON or START position, power is supplied
lthrough 10A fuse [No.14, located in the fuse block (J/B)]
lto combination meter terminal 16.
Ground is supplied
lto combination meter terminals 13 and 23
lthrough grounds M21, M80 and M83.
SPEEDOMETER
The speedometer indicates the vehicle speed.
lABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmits vehicle speed signal to combination meter with CAN communication.
lCombination meter converses the vehicle speed signal to angle signal, and commands to speedometer.
TACHOMETER
The tachometer indicates engine speed in revolutions per minute (rpm).
lECM converses a signal from crank position sensor to engine speed signal, and transmits to combination
meter with CAN communication.
lCombination meter converses the engine speed signal to angle signal, and commands to tachometer.
WATER TEMPERATURE GAUGE
The water temperature gauge indicates the engine coolant temperature.
lECM converses a signal from water temperature sensor to engine coolant temperature signal, and trans-
mits to combination meter with CAN communication.
lCombination meter converses the engine coolant temperature signal to angle signal, and commands to
water temperature gauge.

COMBINATION METERS
DI-5
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FUEL GAUGE
The fuel gauge indicates the approximate fuel level in the fuel tank.
Combination meter reads a resistor signal from fuel level sensor unit.
Signal is supplied
lto combination meter terminal 9
lthrough fuel level sensor unit terminal 1 and 2
lfrom combination meter terminal 4.
ODO/TRIP METER
lABS actuator and electric unit (control unit) converses a pulse signal from wheel sensor to vehicle speed
signal, and transmits vehicle speed signal to combination meter with CAN communication.
lCombination meter uses the vehicle speed signal to calculate the mileage, and it displays.
How to Change/ Reset Indication
lIndication can be changed in the following order by momentarily
pressing the odo/trip meter switch (1).
–Trip A®Trip B®DTE®Average fuel economy®Average
vehicle speed®Running time®Trip A ···.
lHolding the switch for more than 1 second resets displayed
mode (except DTE).
lHolding the switch for more than 3 seconds resets all functions
(except trip A and DTE).
NOTE:
lAfter the display changes automatically, the indication can be
changed to the next mode by pressing the odo/trip meter switch.
lThe record of the odometer is kept even if the battery cable is disconnected.
TRIP COMPUTER
Function
The trip computer can indicate the following items.
lDTE (distance to empty)
lAverage fuel economy
lAverage vehicle speed
lRunning time
DTE (Distance to Empty) Indication
The DTE indication provides the driver with the distance estimation that can be driven before refueling. The
DTE is calculated by signals from the fuel level sensor unit (fuel remaining), ECM (fuel consumption) and ABS
actuator and electric unit (control unit) (vehicle speed). The indication is refreshed every 30 seconds. When
fuel remaining is less than approximately 11.6 (2 1/2 Imp gal), the indication blinks as a warning. If the fuel
remaining is less than approximately 9.6 (2 1/8 Imp gal), the indication shows “---”. In this case, the display
changes to the DTE mode from the different mode. When the battery cable is disconnected and reconnected,
DTE mode displays “---” until the vehicle is driven 0.5 km.
Average Vehicle Speed Indication
Average vehicle speed indication is calculated by running distance and running time. The indication is
refreshed every 30 seconds. If average vehicle speed is reset, average fuel consumption is reset at the same
time. At about 0.5 km and for 30 seconds after resetting, the display shows “- ”®“- ”®“-”®“ -”.
Average Fuel Economy Indication
Average fuel consumption indication is calculated by signals from ABS actuator and electric unit (vehicle
speed) and the ECM (fuel consumption). The indication is refreshed every 30 seconds. At about 0.5 km and
for 30 seconds after resetting, the display shows “- ”®“- ”®“-”®“ -”.
Running Time Indication
Trip time displays ignition switch ON time cumulatively. If trip time is reset, trip distance is reset at the same
time.
SKIB4848E

COMBINATION METERS
DI-13
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Self-Diagnosis Mode of Combination MeterEKS00L8K
FUNCTION
The following items can be checked during self-diagnosis mode.
lSweep of gauges pointer
lPresent gauge data values
lOdo/trip meter display and clock display segments
lCondition of warning lamps/indicator lamps controlled by unified meter control unit
lBattery voltage
lDriver's seat belt buckle switch status
lCPU of unified meter control unit status
OPERATION PROCEDURE
To initiate combination meter self-diagnosis mode, refer to the following procedure.
1. Turn ignition switch ON while pressing clock switch (1).
2. Press and hold clock switch until “tESt” is indicated on odo/trip
meter display (within 7 seconds after the ignition switch ON).
3. Release odo/trip meter switch when “tESt” is indicated.
4. Combination meter self-diagnosis mode starts.
5. Pressodo/tripmeterswitchtogotonextitem.RefertoDI-13,
"TEST ITEM".
NOTE:
Combination meter self-diagnosis mode exits upon turning the igni-
tion switch to OFF or ACC position.
TEST ITEM
PKIC1129E
Te s t
orderTest Item Description of test/data Notes
1 GAGE Sweeps all gauges.Sweeps gauges within 10 seconds.
If any of gauges is not sweeped, replace combination
meter.
2 (All segments illuminated)Illuminates all segments on odo/trip
meter display and clock display.If any of the segments is not illuminated, replace com-
bination meter.
3 bulbIlluminates all lamps controlled by unified
meter control unit.If any of lamp controlled by unified meter control unit is
not illuminated, replace combination meter.
4 rXXXX/FAILDisplays ROM status as “r XXXX” or
“FAIL”.If “FAIL” is displayed, replace combination meter.
5 nrXXXX — Not used for service.
6 EE XX/FAILDisplays memory status as “EE XX” or
“FAIL”.If “FAIL” is displayed, replace combination meter.
7 dtXXXX — Not used for service.
8 Sc1XX — Not used for service.
9 Sc2XX — Not used for service.
10 EprXX — Not used for service.
11 1nFXX Displays market info value.$1C = EUR-LHD
$23 = EUR-RHD
12 cYLXX Displays engine configuration value.$08 = 8 cylinder
$06 = 6 cylinder
$04 = 4 cylinder
13 FFXXXX — Not used for service.
14 tF — Not used for service.
15 ot1XX — Not used for service.
16 ot0XX — Not used for service.