ABS NISSAN TERRANO 2002 Service Owner's Guide

Ground Circuit Check
ABS CONTROL UNIT GROUND
ICheck resistance between ABS actuator and electric unit con-
nector terminals and ground.
Resistance: approximately 0W
NBR321
TROUBLE DIAGNOSES
BR-66

Diagnostic Procedure 1 (Not self-diagnostic
item)
Warning lamp does not come on when ignition switch is
turned ON.
CHECK FUSE
Check 10A fuse
12. For fuse layout, refer
to POWER SUPPLY ROUTING EL sec-
tion.
OK
ENG
Replace fuse.
CHECK ABS (and BRAKE) WARNING
LAMP(S) ACTIVATE
Disconnect ABS actuator and electric unit
connector.
Does the warning lamp(s) activate?
No
EYe s
qA(Go to next page.)
CHECK HARNESS FOR SHORT.
1. Disconnect ABS connector and electric
unit connector.
2. Check voltage between ABS actuator
and electric unit connector
F29(body
side) terminalsq
21,q13and ground.
Battery voltage should not exist.
OK
ENG
Repair harness or connec-
tor.
Check voltage between combination con-
nector LHD:
F118, RHD:M837terminalq28
and ground.
Battery Voltage should exist.
OK
ENG
Replace harness or con-
nector.
CHECK WARNING LAMP(S)
1. Turn ignition switch to ªOFFº position.
2. Check ABS (and Brake) warning
lamp(s).
OK
ENG
Replace bulb(s).
qA
YBR267
YBR268
NBR322
YBR269
H
H
H
H
H
TROUBLE DIAGNOSES
BR-67

qA
CHECK HARNESS FOR SHORT.
1. Disconnect combination meter connec-
tor LHD:
F118andF119, or RHD:M837
andM838.
2. Check continuity between ABS actuator
and electric unit connector
F29and
combination meter connector LHD:
F118andF119, or RHD:M837and
M838.
OK
ENG
Replace harness or con-
nector(s).
Check combination meter
NG
CHECK HARNESS CONNECTOR.
Check ABS actuator and electric unit pin
terminals for damage or connection of
ABS actuator and electric unit harness
connector. Reconnect ABS actuator and
electric unit harness connector. Then
retest.
EOK
Inspection end
REPLACE.
Replace ABS actuator and electric unit.
F29LHD:F119RHD:M838
LHD:F118RHD:M837
Continu-
ity
Terminalq
13q1ÐYes
Terminalq
21Ðq44Ye s
YBR270
H
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 1 (Not self-diagnostic
item) (Cont'd)
BR-68

Diagnostic Procedure 2 (Warning lamp stays
on when ignition switch is turned ON)
CHECK FUSE.
Check 10A fuse
19. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
ENG
qA(Go to next page.)
CHECK WARNING LAMP.
1. Disconnect ABS actuator and electric
unit connector.
2. Connect suitable wire between ABS
actuator and electric unit harness con-
nector
F29terminalsq13,q21and ground.
Warning lamp should not activate.
OK
ENG
qB(Go to next page.)
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.
NG
EOK
Inspection end
CHECK ABS MOTOR GROUND.
1. Turn ignition switch OFF.
2. Disconnect ABS actuator and electric
unit connector.
3. Check continuity between ABS actuator
and electric unit connector
F29(body
side) terminalq
16and ground.
Continuity should exist.
OK
ENG
Check the following.
IHarness connector
F29
IHarness for open or short
between ABS actuator
and electric unit and
ground
If NG, repair harness or
connector.
REPLACE.
Replace ABS actuator and electric unit.
YBR271
NBR345
NBR326
H
H
H
H
TROUBLE DIAGNOSES
BR-69

qA
REPLACE.
Replace fuse.
Does the fuse blow out when ignition
switch is turned ON?
Ye s
ENo
Inspection end
CHECK ABS ACTUATOR AND ELEC-
TRIC UNIT POWER SUPPLY CIRCUIT
FOR SHORT.
1. Disconnect battery cable and ABS
actuator and electric unit connector
F29.
2. Check continuity between ABS actuator
and electric unit connector
F29body
side terminalq
15and ground.
Continuity should not exist.
OK
ENG
Check the following.
IHarness connector
F29
IHarness for open or short
between ABS actuator
and electric unit and fuse
If NG, repair harness or
connector.
REPLACE.
Replace ABS actuator and electric unit.
qB
CHECK ABS WARNING LAMP CON-
TROL CIRCUIT.
1. Disconnect combination meter connector
LHD:
F118andF119, or RHD:M837and
M838.
2. Check continuity between ABS actuator
and electric unit connector
F29(body
side) terminal and combination meter
connector LHD:
F118andF119,or
RHD:
M837andM838.
OK
ENG
Check the following.
IHarness connectors
LHD:
F118andF119,or
RHD:
M837andM838
andF29
IHarness for open or
short between ABS
actuator and electric unit
and combination meter
If NG, repair harness or
connectors.
CHECK COMBINATION METER.
Check combination meter. Refer to WARN-
ING LAMPS in EL section.
F29LHD:F119RHD:M838
LHD:F118RHD:M837
Continu-
ity
Terminalq
13q1ÐYes
Terminalq
21Ðq44Ye s
NBR327
YBR270
H
H
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 2 (Warning lamp stays
on when ignition switch is turned ON) (Cont'd)
BR-70

Diagnostic Procedure 3 (ABS actuator solenoid
valve and solenoid valve relay)
Malfunction code Nos. 41, 42, 45, 46, 55, 56, 63
CHECK FUSIBLE LINK.
Check 40A. For fusible link layout, refer to
POWER SUPPLY ROUTING in EL section.
OK
ENG
qA(Go to next page.)
CHECK FUSE.
Check 10A fuse
19. For fuse layout, refer
to POWER SUPPLY ROUTING in EL sec-
tion.
OK
ENG
qB(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
ENo
Inspection end
CHECK ABS ACTUATOR AND ELECTRIC
UNIT GROUND CIRCUIT.
Refer to ABS ACTUATOR AND ELECTRIC
UNIT GROUND in Ground Circuit Check,
BR-66.
OK
ENG
Repair harness and con-
nector.
CHECK SOLENOID VALVE RELAY
POWER SUPPLY CIRCUIT.
1. Disconnect ABS actuator and electric
unit connector.
2. Check voltage between ABS actuator
and electric unit connector
F29(body
side) terminalq
18and ground.
Battery voltage should exist.
OK
ENG
Check the following.
IHarness connector
F29,
LHD:
F68andM784,or
RHD:
F79andM744
IHarness for open or
short between ABS
actuator and electric unit
and fusible link
If NG, repair harness or
connector.
REPLACE.
Replace ABS actuator and electric unit.
NBR329
NBR330
H
H
H
H
H
TROUBLE DIAGNOSES
BR-71

qA
REPLACE.
Replace fusible link.
Does the fusible link blow out when
ignition switch is turned ON?
Ye s
ENo
Inspection end
CHECK SOLENOID VALVE RELAY
POWER SUPPLY CIRCUIT.
1. Disconnect battery cable and ABS
actuator and electric unit connector.
2. Check continuity between ABS actuator
and electric unit connector
F29(body
side) terminalq
18and ground.
Continuity should not exist.
OK
ENG
Check the following
IHarness connector
F29, LHD:F68and
M784, or RHD:F79and
M744
IHarness for open or short
between ABS actuator
and electric unit and fus-
ible link
If NG, repair harness or
connector.
REPLACE.
Replace ABS actuator and electric unit.
qB
REPLACE.
Replace fuse.
Does the fuse blow out when ignition
switch is turned ON?
No
EYe s
Check the following.
IHarness connector
F29,
M822, LHD:F66and
M787, or RHD:F76:
,F136:,M743:
andM829:
IHarness for open or
short between ABS
actuator and electric unit
and fuse
If NG, repair harness or
connector.
END
Inspection end
NBR331
H
H
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 3 (ABS actuator solenoid
valve and solenoid valve relay) (Cont'd)
BR-72

Diagnostic Procedure 4 (Wheel sensor or rotor)
Malfunction code No. 21, 22, 25, 26, 31, 32, 35, 36 or 18
INSPECTION STARTS
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
ENo
Inspection end
CHECK WHEEL SENSOR ELECTRICAL.
1. Disconnect ABS actuator and electric
unit connector.
2. Check resistance between ABS actua-
tor and electric unit connector
F29
(body side) terminals.
Code No. 21 or 22 (Front RH wheel)
Terminalsq
5andq4
Code No. 25 or 26 (Front LH wheel)
Terminalsq
7andq6
Code No. 31 or 32 (Rear RH wheel)
Terminalsq
2andq1
Code No. 35 or 36 (Rear LH wheel)
Terminalsq
9andq8
Resistance: Front 0.9 - 1.1 kW
Rear 1.44 - 1.76 kW
NG
EOK
qA(Go to next page.)
CHECK WHEEL SENSOR.
Check each sensor for resistance.
Resistance: Front 0.9 - 1.1 kW
Rear 1.44 - 1.76 kW
NG
EOK
Check the following.
IHarness connectors
F29,B57,B58,E15:
,E211:and
F32
IHarness for open or
short between wheel
sensor connectors and
ABS actuator and elec-
tric unit
If NG, repair harness or
connectors.
REPLACE.
Replace wheel sensor.
YBR273
NBR332
YBR274
H
H
H
TROUBLE DIAGNOSES
BR-73

qA
Note Note
CHECK TIRE.
Check for inflation pressure, wear and size
of each tire.
OK
ENG
Adjust tire pressure or
replace tire(s).
Note
CHECK WHEEL BEARING
Check wheel bearing axial end play.
OK
Note Note
CHECK SENSOR ROTOR.
Check sensor rotor for teeth damage.
OK
ENG
Replace sensor rotor.
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.
Note: Wheel position should be distinguished by code num-
bers except code No. 18 (sensor rotor).
H
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 4 (Wheel sensor or rotor)
(Cont'd)
BR-74

Diagnostic Procedure 5 (Motor Relay or motor)
Malfunction code No. 61
CHECK FUSIBLE LINK.
Check 40A. For fusible link layout, refer to
POWER SUPPLY ROUTING in EL section.
OK
ENG
qA(Go to next page.)
CHECK CONNECTOR
1. Disconnect ABS actuator and electric
unit connector. Check terminals for dam-
age or loose connection. Then recon-
nect connector.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Ye s
ENo
Inspection end
CHECK MOTOR RELAY POWER SUP-
PLY CIRCUIT.
1. Disconnect ABS actuator and electric
unit connector.
2. Check voltage between ABS actuator
and electric unit connector
F29(body
side) terminalq
17and ground.
Battery voltage should exist.
OK
ENG
Check the following.
IHarness connector
F29,
LHD:
F68andM784,or
RHD:
F79andM744
IHarness 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 ELECTRIC
UNIT GROUND in Ground Circuit Check,
BR-66.
OK
ENG
Repair harness and termi-
nals.
REPLACE.
Replace ABS actuator and electric unit.
YBR275
NBR335
H
H
H
H
TROUBLE DIAGNOSES
BR-75