Nissan Terrano r20e. Manual — part 69
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?
Yes
E
No
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)
Terminals
q
5
and
q
4
Code No. 25 or 26 (Front LH wheel)
Terminals
q
7
and
q
6
Code No. 31 or 32 (Rear RH wheel)
Terminals
q
2
and
q
1
Code No. 35 or 36 (Rear LH wheel)
Terminals
q
9
and
q
8
Resistance: Front 0.9 - 1.1 k
Ω
Rear 1.44 - 1.76 k
Ω
NG
E
OK
q
A
(Go to next page.)
CHECK WHEEL SENSOR.
Check each sensor for resistance.
Resistance: Front 0.9 - 1.1 k
Ω
Rear 1.44 - 1.76 k
Ω
NG
E
OK
Check the following.
I
Harness connectors
F29
,
B57
,
B58
,
E15
:
,
E211
:
and
F32
I
Harness 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
q
A
Note
Note
CHECK TIRE.
Check for inflation pressure, wear and size
of each tire.
OK
E
NG
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
E
NG
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
E
NG
q
A
(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?
Yes
E
No
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) terminal
q
17
and ground.
Battery voltage should exist.
OK
E
NG
Check the following.
I
Harness connector
F29
,
LHD:
F68
and
M784
, or
RHD:
F79
and
M744
I
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 ELECTRIC
UNIT GROUND in Ground Circuit Check,
BR-66.
OK
E
NG
Repair harness and termi-
nals.
REPLACE.
Replace ABS actuator and electric unit.
YBR275
NBR335
H
H
H
H
TROUBLE DIAGNOSES
BR-75
q
A
REPLACE.
Replace fusible link.
Does the fusible link blow out when
ignition switch is turned ON?
Yes
E
No
Inspection end
CHECK ABS ACTUATOR MOTOR
POWER SUPPLY CIRCUIT.
1. Disconnect battery cable and ABS
actuator and electric unit connector
F29
.
2. Check continuity between ABS actuator
and electric unit connector
F29
(body
side) terminal
q
17
and ground.
Continuity should not exist.
OK
E
NG
Check the following
I
Harness connector
F29
,
LHD:
F68
and
M784
, or
RHD:
F79
and
M744
I
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.
NBR336
H
H
H
TROUBLE DIAGNOSES
Diagnostic Procedure 5 (Motor Relay or motor)
(Cont’d)
BR-76
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