Infiniti I35 (A33). Manual — part 143
4
CHECK CONNECTOR
1. Turn ignition switch OFF, disconnect the ABS actuator and electric unit (control unit) connector, and check the terminal
for deformation, disconnection, looseness, etc. If there is a malfunction, repair or replace the terminal.
2. Reconnect connector to perform self-diagnosis.
Is only “CAN COMM CIRCUIT” indicated in the self-diagnosis results?
Yes
©
Print out the self-diagnostic results. Refer to EL-463.
No
©
Connector terminal connection is loose, damaged, open or shorted.
SBR222F
Component Check
NHBR0285
VDC OFF SWITCH
NHBR0285S01
I
Disconnect the VDC OFF switch connector M220. Check for
continuity between the terminal No. 4 and No. 5.
4 - 5
Pressing the switch will make a continuity, and
releasing it will stop the continuity.
SBR223F
VDC RELAY BOX
NHBR0285S02
Disconnect the VDC relay box connectors E165, E166 and E600.
Check for continuity, resistance value, and insulation between any
pair of terminals in the VDC relay box.
Continuity and Resistance
NHBR0285S0201
SBR224F
GI
MA
EM
LC
EC
FE
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
VDC
Inspection 15 CAN Communication Circuit, VDC/TCS/ABS Control Unit and Steering Angle Sensor (Cont’d)
BR-157
ABS ACTUATOR
NHBR0285S03
Take each connector off from the actuator. Then check electric cir-
culation and resistance in between terminals.
SBR225F
CAUTION:
Confirm that the earth of actuator motor is completely
removed.
Continuity and Resistance
NHBR0285S0301
SBR226F
Check The Resistance
NHBR0285S0302
Standard value (
Ω
)
Solenoid valves
Outlet - Outlet: 6.0 - 10.0
Outlet - Inlet: 9.0 - 16.0
Inlet - Inlet: 12.0 - 22.0
VDC switch-over solenoid valve
Primary-side 1 - Secondary-side 1: 12.0 - 22.0
Primary-side 2 - Secondary-side 2: 6.0 - 10.0
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
VDC
Component Check (Cont’d)
BR-158
Primary-side 1 - Primary-side 2, Secondary-side 2:
9.0 - 16.0
Secondary-side 1 - Primary-side 2, Secondary-
side 2: 9.0 - 16.0
SBR227F
Actuator Operation Check
NHBR0285S0303
1.
Connect E165 and E600 terminals of actuator to VDC relay
box.
2.
Measure the motor voltage [No. 4 (R/B) terminal to body
ground] with oscilloscope. Then check the motor reverse volt-
age occasioned time.
The motor reverse voltage occasioned time is more than 0.1
sec.
CAUTION:
I
Perform checking of motor relay unit. Then confirm that
relay functions.
I
Driving actuator motor is within 4 sec. to prevent heating
up.
I
Standard condition of the motor reverse voltage occa-
sioned time is: Battery voltage is 12V. temperature 20°.
when the battery voltage or temperature is lower than the
standard, the motor reverse voltage occasioned time
becomes slightly shorter.
GI
MA
EM
LC
EC
FE
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC ITEMS
VDC
Component Check (Cont’d)
BR-159
Symptom 1: ABS Works Frequently
NHBR0286
Inspection procedure
1
INSPECTION START
Check the wheel speed sensor system.
I
Sensor mounting inspection
I
Sensor pick-up inspection for iron chips
I
Sensor rotor inspection (e.g. number of teeth, damaged teeth)
I
Sensor connector engagement inspection
Is inspection result OK?
Yes
©
GO TO 2.
No
©
Refer to wheel speed sensor and rotor lines.
2
LOOSENESS INSPECTION
Check the front axle for looseness.
Is inspection result OK?
Yes
©
Symptom 2: Unexpected Pedal Action, BR-160.
No
©
Axle inspection and repair
Symptom 2: Unexpected Pedal Action
NHBR0287
Inspection procedure
1
BRAKE PEDAL STROKE INSPECTION
Check the brake pedal stroke.
Is stroke excessively long?
Yes
©
Check the bleeding and brake system.
No
©
GO TO 2.
2
PEDAL FORCE INSPECTION
Check that the brake is effective with the pedal depressed.
Is the pedal heavy, but effective?
Yes
©
Normal
No
©
GO TO 3.
3
CONNECTOR AND PERFORMANCE INSPECTION
Disconnect the actuator relay unit connector to deactivate the ABS function. Check that the brake is effective.
Is the brake effective?
Yes
©
GO TO 4.
No
©
Brake line inspection
4
ABS WARNING LAMP INDICATOR INSPECTION
Check that the ABS warning lamp illuminates.
Does the ABS warning lamp illuminate?
Yes
©
Perform the self-diagnosis.
No
©
GO TO 5.
TROUBLE DIAGNOSES FOR SYMPTOMS
VDC
Symptom 1: ABS Works Frequently
BR-160
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