1998 NISSAN PATROL engine

Preliminary Check
Check brake ¯uid level in reservoir
tank.
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Low ¯uid level may indicate brake pad
wear or leakage from brake line.
Check brake line for leakage.
OKcNG Repair.
b
Check brake booster for operation and air
tightness. Refer to BR-15.
OK
cNGReplace.
b
Check brake pads and rotor. Refer to
BR-21, 25.
OK
cNGReplace.
Check brake ¯uid level in reservoir tank
again.
OK
cNGFill up brake ¯uid.
Check warning lamp activation.
When ignition switch is turned on, warning
lamp turns on.
OK
cNG
Check fuse, warning lamp
bulb and warning lamp cir-
cuit.
Check warning lamp for deactivation after
engine is started.
OK
cNGGo to Self-diagnosis,
BR-46, 50.
Drive vehicle at speeds over 30 km/h (19
MPH) for at least 1 minute.
Ensure warning lamp remains off while
driving.
OK
cNGGo to Self-diagnosis,
BR-46, 50.
END
SBR451D
SBR389C
SBR058C
SBR059C
SBR186E
.
.
.
.
.
.
.
.
.
TROUBLE DIAGNOSES
BR-40

CONSULT Inspection Procedure
SELF-DIAGNOSIS PROCEDURE
1) Turn ignition switch OFF.
2) Connect CONSULT to Data Link Con- nector for CONSULT.
1) Start engine.
2) Drive vehicle over 30 km/h (19 MPH) for at least one minute.
1) Stop vehicle with engine runningand touch ``START'' on CONSULT
screen.
2) Touch ``ABS''.
3) Touch ``SELF-DIAG RESULTS''.
+ The screen shows the detected mal-
function and how many times the igni-
tion switch has been turned since the
malfunction.
Make the necessary repairs following the
diagnostic procedures.
After the malfunctions are repaired, erase
the self-diagnostic results stored in the
control unit by touching ``ERASE''.
Check warning lamp for deactivation after
driving vehicle over 30 km/h (19 MPH) for
at least one minute.
Test the ABS in a safe area to verify that it
functions properly.
Note: ``SELF-DIAG RESULTS'' screen shows the detected malfunction and how many times the ignition switch has been turned since the mal-
function.
SBR195E
SBR455D
SBR080E
SST412B
SBR950C
.
.
.
.
.
.
TROUBLE DIAGNOSES
BR-51

ACTIVE TEST PROCEDURE
+When conducting Active test, vehicle must be stationary.
+ When ABS warning lamp stays on, never conduct Active test.
1) Turn ignition switch OFF.
2) Connect CONSULT to Data Link Connector for CONSULT.
3) Start engine.
1) Touch ``START'' on CONSULT screen.
2) Touch ``ABS''.
3) Touch ``ACTIVE TEST''.
1) Select active test item by touching screen.
2) Touch ``START''.
Carry out the active test by touching screen key.
SBR455D
SBR080E
SST412B
SBR857D
SBR934C
.
.
.
TROUBLE DIAGNOSES
CONSULT Inspection Procedure (Cont'd)
BR-54

DATA MONITOR MODE
MONITOR ITEM CONDITION SPECIFICATION
FR RH SENSOR
FR LH SENSOR
RR 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-SWITCH Vehicle 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 SOL 1. Drive vehicle at speeds over
30 km/h (19 MPH) for at
least one minute.
2. Engine is running. Operating conditions for each solenoid valve are indicated.
ABS is not operating: OFF
MOTOR RELAY ABS 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 LAMP ABS warning lamp is turned on: ON
ABS warning lamp is turned off: OFF
BATTERY VOLT Power supply voltage for control unit
ACTIVE TEST MODE
TEST ITEM CONDITION JUDGEMENT
FR RH SOLENOID
FR LH SOLENOID
REAR SOLENOID Engine is running.Brake ¯uid pressure control operation
IN SOL OUT SOL
UP (Increase):
KEEP (Hold):
DOWN (Decrease): OFF
ON
ONOFF
OFF
ON
ABS MOTOR ABS actuator motor
ON: Motor runs (ABS motor relay ON)
OFF: Motor stops (ABS motor relay OFF)
G SWITCH Ignition switch is ON. G SWITCH (G SENSOR),
ON: Set G SWITCH MONITOR ``ON''
(G switch circuit is closed.)
OFF: Set G SWITCH MONITOR ``OFF'' (G switch circuit is open.)
Note: Active test will automatically stop ten seconds after the test starts. (LIMIT SIGNAL monitor shows ON.)
TROUBLE DIAGNOSES
CONSULT Inspection Procedure (Cont'd)
BR-55

Diagnostic Procedure 10 (ABS does not work.)
CHECK WARNING LAMP ACTIVATE.
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Does the ABS warning lamp activate?
No
cYe s Carry out self-diagnosis.
Refer to BR-47, 51.
Go toin Diagnostic Procedure 8,
BR-67.
Note: ABS does not work when vehicle speed is under 10 km/h (6 MPH).
Diagnostic Procedure 11 (Pedal vibration and
noise)
INSPECTION START
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1. Apply brake.
2. Start engine.
3. Does the symptom appear only when engine is started?
No
cYe s Carry out self-diagnosis.
Refer to BR-47, 51.
CHECK IF SYMPTOM APPEARS.
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Does the symptom appear when electrical
equipment switches (such as headlamp)
are operated?
Ye s
cNo Go toin Diagnostic
Procedure 8, BR-67.
CHECK WHEEL SENSOR.
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Check wheel sensor shield ground. For
location of shield ground, refer to wiring
diagram and ``HARNESS LAYOUT'' in EL
section.
OK
cNG Repair wheel sensor.
CHECK HARNESS CONNECTOR.
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Check ABS actuator and electric unit pin
terminals for damage or the connection of
ABS actuator and electric unit harness
connector.
Reconnect ABS actuator and electric unit
harness connector. Then retest.
SAT797A
.
.
.
.
TROUBLE DIAGNOSES FOR SYMPTOMS
BR-68

Note: ABS may operate and cause vibration under any of thefollowing conditions.
+ Applying brake gradually when shifting or operating
clutch.
+ Low friction (slippery) road.
+ High speed cornering.
+ Driving over bumps and pot holes.
+ Engine speed is over 5,000 rpm with vehicle stopped.
Diagnostic Procedure 12 (Warning lamp does
not come on when ignition switch is turned
ON.)
CHECK FUSE.
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Check 10A fuse
28. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
cNG Replace fuse.
CHECK WARNING LAMP ACTIVATE.
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Disconnect ABS actuator and electric unit
connector.
Does the warning lamp activate?
No
cYe s jA(Go to next page.)
CHECK HARNESS FOR SHORT.
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1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector
E18(body
side) terminal j
21and ground.
Battery voltage should not exist.
OK
cNG Repair harness or connec-
tor.
CHECK COMBINATION METER.
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Check combination meter. Refer to
WARNING LAMPS in EL section.
SBR205E
SBR186E
SBR144EB
.
.
.
TROUBLE DIAGNOSES FOR SYMPTOMS
Diagnostic Procedure 11 (Pedal vibration and
noise) (Cont'd)
BR-69

Inspection and Adjustment
DISC BRAKE
Unit: mm (in)
Brake model CL36VE CL18VF
Pad wear limit
Minimum thickness 2.0 (0.079)
Rotor repair limit
Minimum thickness 30.0 (1.181) 16.0 (0.630)
PARKING CENTER BRAKE
Unit: mm (in)
Brake model DS20HB
Lining wear limit
Minimum thickness 1.5 (0.059)
Drum repair limit
Maximum inner diameter 204.5 (8.05)
BRAKE PEDAL
Unit: mm (in)
Applied model M/T
Free height ``H''*184 - 194
(7.24 - 7.64)
Depressed height ``D''
[under force of 490 N (50
kg, 110 lb) with engine run-
ning]More than
80 (3.15)
Clearance ``C'' between
pedal stopper and threaded
end of stop lamp switch or
ASCD switch0.3 - 1.0 (0.012 - 0.039)
Pedal free play
At clevis 1.0 - 3.0 (0.039 - 0.118)
At pedal pad 3.0 - 11.0 (0.118 - 0.433)
*: Measured from surface of melt sheet to pedal pad.
PARKING CENTER BRAKE CONTROL
Control type Center lever
Lever stroke
[under force of 196 N (20 kg, 44 lb)]7-9
Lever stroke when warning switch comes on 2
SERVICE DATA AND SPECIFICATIONS (SDS)
BR-73