Infiniti G20 (P11). Manual — part 120
Malfunction Code/Symptom Chart
NCBR0097
Code No. (No. of LED flashes)
Malfunctioning part
Reference page
12
Self-diagnosis could not detect any malfunctions.
—
18
Sensor rotor
21
Front right sensor (open-circuit)
22
Front right sensor (short-circuit)
25
Front left sensor (open-circuit)
26
Front left sensor (short-circuit)
31
Rear right sensor (open-circuit)
32
Rear right sensor (short-circuit)
35
Rear left sensor (open-circuit)
36
Rear left sensor (short-circuit)
41
Actuator front right outlet solenoid valve
42
Actuator front right inlet solenoid valve
45
Actuator front left outlet solenoid valve
46
Actuator front left inlet solenoid valve
51
Actuator rear right outlet solenoid valve
52
Actuator rear right inlet solenoid valve
55
Actuator rear left outlet solenoid valve
56
Actuator rear left inlet solenoid valve
57*
Power supply (Low voltage)
61
Actuator motor or motor relay
63
Solenoid valve relay
71
Control unit
ABS warning lamp stays on when
ignition switch is turned on.
Control unit power supply circuit
Warning lamp bulb circuit
Control unit or control unit connector
Solenoid valve relay stuck
Power supply for solenoid valve relay coil
ABS warning lamp stays on, during
self-diagnosis.
Control unit
—
ABS warning lamp does not come on
when ignition switch is turned on.
Fuse, warning lamp bulb or warning lamp circuit
Control unit
ABS warning lamp does not come on
during self-diagnosis.
Control unit
—
Pedal vibration and noise
—
Long stopping distance
—
Unexpected pedal action
—
ABS does not work.
—
ABS works frequently.
—
*: Under voltage that is too low, the control unit disable the ABS. It does not set the ABS in fail-safe condition. Instead, the ABS becomes
a conventional brake system. After the power supply has resumed, the warning lamp goes off, making it possible for the ABS to be
re-engaged.
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
ABS
Malfunction Code/Symptom Chart
BR-55
Wheel Sensor or Rotor
NCBR0098
DIAGNOSTIC PROCEDURE
NCBR0098S01
Malfunction code No. 21, 22, 25, 26, 31, 32, 35, 36 or 18
NOTE:
Wheel position should be identified by code No. except code No.
18 (sensor rotor).
1
INSPECTION START
Wheel sensor inspection
SBR476EA
©
GO TO 2.
2
CHECK CONNECTOR
1. Disconnect connectors from control unit and wheel sensor of malfunction code No. Check terminals for damage or
loose connections. Then reconnect connectors.
2. Carry out self-diagnosis again.
Does warning lamp activate again?
Yes
©
GO TO 3.
No
©
INSPECTION END
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
ABS
Wheel Sensor or Rotor
BR-56
3
CHECK WHEEL SENSOR CIRCUIT
1. Disconnect control unit connector.
2. Check resistance between control unit connector terminals.
Code No. 21 or 22 (Front RH wheel)
Terminals 4 and 5
Code No. 25 or 26 (Front LH wheel)
Terminals 6 and 7
Code No. 31 or 32 (Rear RH wheel)
Terminals 1 and 3
Code No. 35 or 36 (Rear LH wheel)
Terminals 8 and 9
Resistance: 1.44 - 1.76 k
Ω
SBR477EA
Is resistance 1.44 - 1.76 k
Ω
?
Yes
©
GO TO 5.
No
©
GO TO 4.
4
CHECK WHEEL SENSOR
Check resistance of each sensor. (See NOTE.)
Resistance: 1.44 - 1.76 k
Ω
SBR478EA
Is resistance 1.44 - 1.76 k
Ω
?
Yes
©
Repair harness and connectors between control unit connector and wheel sensor con-
nector.
No
©
Replace wheel sensor.
5
CHECK TIRE
Check for inflation pressure, wear and size of each tire.
Are tire pressure and size correct and is tire wear within specifications?
Yes
©
GO TO 6.
No
©
Adjust tire pressure or replace tire(s).
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
ABS
Wheel Sensor or Rotor (Cont’d)
BR-57
6
CHECK WHEEL BEARING
Check wheel bearing axial end play.
Check clearance between sensor and rotor.
Clearance:
Front
0.7 - 1.5 mm (0.028 - 0.059 in)
Rear
0.58 - 1.20 mm (0.0228 - 0.0472 in)
SBR333E
SBR069CA
Is axial end play and clearance within specifications?
Yes
©
GO TO 7.
No
©
Clean sensor fixing portion, or replace sensor.
7
CHECK SENSOR ROTOR
Check sensor rotor for teeth damage.
Is sensor rotor free from damage?
Yes
©
Check control unit pin terminals for damage or the connection of control unit harness
connector. Reconnect control unit harness connector. Then retest.
No
©
Replace sensor rotor.
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
ABS
Wheel Sensor or Rotor (Cont’d)
BR-58
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