NISSAN PATROL 2006 Repair Manual

Diagnostic Procedure 1 (Wheel sensor or rotor)
Malfunction code No. 21, 22, 25, 26, 31, 32, 35, 36 or 18
INSPECTION START
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1. Disconnect connectors from ABS actua- tor and electric unit and wheel sensor
of malfunction code No. Check termi-
nals for damage or loose connections.
Then reconnect connectors.
2. Carry out self-diagnosis again. Does warning lamp activate again?
Ye s
cNo Inspection end
CHECK WHEEL SENSOR ELECTRICAL.
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1. Disconnect ABS actuator and electric unit connector.
2. Check resistance between ABS actua- tor and electric unit connector
E18
(body side) terminals.
Code No. 21 or 22 (Front RH wheel)
Terminals j
4andj5
Code No. 25 or 26 (Front LH wheel)
Terminals j
6andj7
Code No. 31 or 32 (Rear RH wheel)
Terminals j
1andj2
Code No. 35 or 36 (Rear LH wheel)
Terminals j
8andj9
Resistance: 1.44 - 1.76 k
W
NG
cOK
jA(Go to next page.)
CHECK WHEEL SENSOR.
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Check each sensor for resistance.
Resistance: 1.44 - 1.76 k W
NG
cOK
Check the following.
+Harness connectors
E18,E77,E62,C6,
C5
+Harness for open or
short between wheel
sensor connectors and
ABS actuator and elec-
tric unit
If NG, repair harness or
connectors.
REPLACE.
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Replace wheel sensor.
SBR196E
SBR048EB
SBR197E
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BR-57

jA
NoteCHECK TIRE.
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Check for in¯ation pressure, wear and
size of each tire.
OK
cNG Note
Adjust tire pressure or
replace tire(s).
NoteCHECK WHEEL BEARING.
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Check wheel bearing axial end play.
OK
Note CHECK SENSOR ROTOR.
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Check sensor rotor for teeth damage.
OK
cNG Note
Replace sensor rotor.
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.
Note: Wheel position should be distinguished by code num- bers except code No. 18 (sensor rotor).
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
Diagnostic Procedure 1 (Wheel sensor or rotor)
(Cont'd)
BR-58

Diagnostic Procedure 2 (ABS actuator solenoid
valve and solenoid valve relay)
Malfunction code No. 41, 45, 55, 42, 46, 56, 63
CHECK FUSIBLE LINK.
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Check 30A fusible link
i. For fusible link
layout, refer to POWER SUPPLY ROUT-
ING in EL section.
OK
cNG jA(Go to next page.)
CHECK FUSE.
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Check 7.5A fuse
7. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
cNG jB(Go to next page.)
CHECK CONNECTOR.
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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
cNo Inspection end
CHECK ABS ACTUATOR AND ELECTRIC
UNIT GROUND CIRCUIT.
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Refer to ABS ACTUATOR AND ELECTRIC
UNIT GROUND in Ground Circuit Check,
BR-56.
OK
cNG Repair harness and con-
nector.
CHECK SOLENOID VALVE RELAY
POWER SUPPLY CIRCUIT.
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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
18and ground.
Battery voltage should exist.
OK
cNG Check the following.
+Harness connector
E18
+Harness for open or
short between ABS
actuator and electric unit
and fusible link
If NG, repair harness or
connector.
REPLACE.
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Replace ABS actuator and electric unit.
SBR198E
SBR052EB
.
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BR-59

jA
REPLACE.
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Replace fusible link.
Does the fusible link blow out when
ignition switch is turned ``ON''?
Ye s
cNo Inspection end
CHECK SOLENOID VALVE RELAY
POWER SUPPLY CIRCUIT.
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1. Disconnect ABS actuator and electric
unit connector.
2. Check continuity between ABS actuator and electric unit connector
E18(body
side) terminal j
18and ground.
Continuity should not exit.
OK
cNG Check the following.
+Harness connector
E18
+Harness for open or short
between ABS actuator
and electric unit and
fusible link
If NG, repair harness or
connector.
REPLACE.
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Replace ABS actuator and electric unit.
jB
REPLACE.
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Replace fuse.
Does the fuse blow out when ignition
switch is turned ``ON''?
No
cYe s Check the following.
+Harness connector
E18
+Harness for open or
short between ABS
actuator and electric unit
and fuse
If NG, repair harness or
connector.
END
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INSPECTION END
SBR053EB
.
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
Diagnostic Procedure 2 (ABS actuator solenoid
valve and solenoid valve relay) (Cont'd)
BR-60

Diagnostic Procedure 3 (Motor relay or motor)
Malfunction code No. 61
CHECK FUSIBLE LINK.
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Check 30A fusible link
d . For fusible link
layout, refer to POWER SUPPLY ROUT-
ING in EL section.
OK
cNG jA(Go to next page.)
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
cNo Inspection end
CHECK MOTOR RELAY POWER SUP-
PLY CIRCUIT.
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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
17and ground.
Battery voltage should exist.
OK
cNG Check the following.
+Harness connector
E18
+Harness for open or
short between ABS
actuator and electric unit
and fusible link
If NG, repair harness or
connector.
CHECK ABS ACTUATOR AND ELECTRIC
UNIT GROUND.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Refer to ABS ACTUATOR AND ELEC-
TRIC UNIT GROUND in Ground Circuit
Check, BR-56.
OK
cNG Repair harness and termi-
nals.
REPLACE.
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Replace ABS actuator and electric unit.
SBR199E
SBR055EB
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BR-61

jA
REPLACE.
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Replace fusible link.
Does the fusible link blow out when
ignition switch is turned ``ON''?
Ye s
cNo Inspection end
CHECK ABS ACTUATOR MOTOR
POWER SUPPLY CIRCUIT.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect battery cable and ABS actuator and electric unit connector
E18.
2. Check continuity between ABS actuator and electric unit connector
E18(body
side) terminal j
17and ground.
Continuity should not exist.
OK
cNG Check the following
+Harness connector
E18
+Harness for open or
short between ABS
actuator and electric unit
and fusible link
If NG, repair harness or
connector.
CHECK HARNESS CONNECTOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.
SBR056EB
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
Diagnostic Procedure 3 (Motor relay or motor)
(Cont'd)
BR-62

Diagnostic Procedure 4 (Low voltage)
Malfunction code No. 57
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
cNo Inspection end
CHECK ABS CONTROL UNIT POWER
SUPPLY CIRCUIT.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect ABS actuator and electric unit connector.
2. Check voltage between ABS actuator and electric unit connector
E18(body
side) terminal j15and ground.
Battery voltage should exist when
ignition switch is turned ON.
OK
cNG jA(See below.)
CHECK ABS CONTROL UNIT GROUND.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Refer to ABS ACTUATOR AND ELEC-
TRIC UNIT GROUND in Ground Circuit
Check, BR-56.
OK
cNG Repair harness and con-
nector.
CHECK HARNESS CONNECTOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.
jA
CHECK FUSE.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check 7.5A fuse
7. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
cNG Replace fuse.
CHECK ABS CONTROL UNIT POWER
SUPPLY CIRCUIT.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check continuity between battery and
ABS actuator and electric unit connector
E18(body side) terminal j15.
OK
cNG
Check the following.
+Harness connector
E18+Harness for open or
short between ABS
actuator and electric unit
and fuse
If NG, repair harness or
connector.
CHECK BATTERY.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check battery. Refer to BATTERY in EL
section.
SBR200E
SBR058EB
.
.
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BR-63

Diagnostic Procedure 5 (G sensor)
Malfunction code No. 17
CHECK G SENSOR POWER SUPPLY
CIRCUIT.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check 7.5A fuse
7. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
cNG Replace fuse.
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
cNo Inspection end
CHECK G SENSOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Refer to G SENSOR in Electrical Compo-
nents Inspection, BR-64.
OK
cNG Replace G sensor.
CHECK G SENSOR POWER SUPPLY
CIRCUIT.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect G sensor connector.
2. Check voltage between G sensor con- nector
:B34,B33,:B121,
B120(body side) terminal j15and
ground.
Battery voltage should exist.
OK
cNG Check the following.
+Harness connectors
:B34,B33,E18,
:B121,B120,E18
+Harness for open or short
between G sensor and
ABS actuator and electric
unit
If NG, repair harness or
connectors.
CHECK G SENSOR GROUND.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect ABS actuator and electric unit connector and G sensor connectors.
2. Check continuity between ABS actuator and electric unit connector
E18(body
side) terminals j
10,j20and G sensor
connectors
:B34,B33,:
B121,B120(body side) terminals j10,j20.
Continuity should exist.
OK
cNG Check the following.
+Harness connectors
:B34,B33,E18,
:B121,B120,B18
+Harness for open or short
between G sensor and
ABS actuator and electric
unit
If NG, repair harness or
connectors.
CHECK HARNESS CONNECTOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
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.
SBR201E
SBR202E
SBR203E
.
.
.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
BR-64

ELECTRICAL COMPONENTS INSPECTION
G sensor
CAUTION:
The G sensor is easily damaged if it sustains an impact. Be
careful not to drop or bump it.
1. Measure resistance between terminalsj
15andj20of G sensor
unit connector.
G sensor condition Resistance between
terminals j15andj20
G sensor switch
condition
Installed in vehicle 1.4 - 1.6 k W``ON''
Tilted as shown in ®gure 4.7 - 5.5 k W``OFF''
2. Measure resistance between terminals j10andj15of the G
sensor unit connector.
Resistance: 70 - 124 W
Diagnostic Procedure 6 (Control unit)
Malfunction code No. 71
CHECK CONNECTOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Disconnect ABS actuator and electric unit connector.
Check terminals for damage or loose
connections. Then reconnect connector.
2. Carry out self-diagnosis again. Does warning lamp activate again?
Ye s
cNo Inspection end
ABS CONTROL UNIT POWER SUPPLY
CHECK
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check voltage. Refer to
in Diagnostic
Procedure 4, BR-63.
CHECK SELF-DIAGNOSTIC RESULTS
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Does warning lamp indicate code No. 71
again?
No
cYe s Replace ABS actuator and
electric unit.
INSPECTION
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Inspect the system according to the code
No.
SBR844DC
SBR204E.
.
.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
Diagnostic Procedure 5 (G sensor) (Cont'd)
BR-65

Diagnostic Procedure 7 (ABS works
frequently.)
CHECK BRAKE FLUID PRESSURE.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check brake ¯uid pressure distribution.
Refer to proportioning valve inspection.
OK
cNG Perform Preliminary
Check, refer to BR-40.
CHECK WHEEL SENSOR.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
1. Check wheel sensor connector for ter- minal damage or loose connections.
2. Perform wheel sensor mechanical check.
Refer to Diagnostic Procedure 1,
BR-57.
OK
cNG Repair.
CHECK FRONT AXLES.
- ---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Check front axles for excessive loose-
ness. Refer to FA section (``Front Wheel
Bearing'', ``ON-VEHICLE SERVICE'').
OK
cNG Repair.
Go toin Diagnostic Procedure 8,
BR-66.
.
.
.
TROUBLE DIAGNOSES FOR SYMPTOMS
BR-66