Infiniti F50. Manual — part 279
TROUBLE DIAGNOSIS
BRC-59
C
D
E
G
H
I
J
K
L
M
A
B
BRC
3.
CHECKING SELF-DIAGNOSIS RESULTS (2)
1.
Connect VDC/TCS/ABS control unit and steering angle sensor connector.
2.
Connect battery negative terminal. Turn ignition switch ON.
3.
Erase self-diagnosis results. Then start engine and perform self-diagnosis.
Does only “STEERING ANGLE SENSOR COMMUNICATION SYSTEM” appear on self-diagnosis results dis-
play?
YES
>> Check spiral cable (Replace steering angle sensor and adjust steering angle sensor neutral posi-
BRC-6, "Adjustment of Steering Angle Sensor Neutral Position"
NO
>> GO TO 4.
4.
CAN COMMUNICATION SYSTEM CHECK
Check “CAN DIAGNOSIS SUPPORT MONITOR” of data monitor items.
>> Print out monitor items. Then refer to CAN system
LAN-24, "CAN SYSTEM (FOR VDC MOD-
LAN-40, "CAN SYSTEM (FOR ICC MODELS)"
.
Inspecting Components
EFS001ZS
VDC OFF SWITCH
●
Disconnect VDC OFF switch connector. Check continuity
between terminal No. 1 and terminal No. 2.
VDC RELAY BOX
Disconnect VDC relay box connector. Check continuity, resistance
value, and insulation between any pair of terminals in VDC relay box.
Normal
Error (example)
Models with ICC system
Models without ICC system
CAN COMM: OK
CAN COMM: OK
CAN COMM: OK
CAN CIRC1: OK
CAN CIRC1: OK
CAN CIRC 1: UNKWN
CAN CIRC 2: OK
CAN CIRC 2: OK
CAN CIRC 2: UNKWN
CAN CIRC3: OK
CAN CIRC3: OK
CAN CIRC 3: UNKWN
CAN CIRC 4: OK
CAN CIRC 4: OK
CAN CIRC 4: UNKWN
CAN CIRC 5: OK
CAN CIRC 5: UNKWN
CAN CIRC 5: UNKWN
CAN CIRC 6: OK
CAN CIRC 6: OK
CAN CIRC 6: UNKWN
No. 1 to No. 2:
Pressing switch will establish continuity, releasing
it will break continuity.
SFIA0848E
SFIA0882E
BRC-60
TROUBLE DIAGNOSIS
Continuity, Resistance
VDC/TCS/ABS ACTUATOR
Disconnect actuator connectors. Check continuity and resistance value between any pair of terminals on the
actuator.
CAUTION:
Make sure actuator motor is correctly grounded.
SFIA0582E
SFIA0813E
TROUBLE DIAGNOSIS
BRC-61
C
D
E
G
H
I
J
K
L
M
A
B
BRC
Continuity, resistance
SFIA0814E
BRC-62
TROUBLE DIAGNOSIS
Actuator Operation Inspection
1.
Connect E56 and E57 terminals of actuator to 15 and 16 terminals of VDC relay box.
2.
Measure motor voltage (No. 4 (R/B) terminal to body ground)
with oscilloscope. Then check motor reverse voltage occasioned
time. Motor reverse voltage occasioned time is more than 0.1
sec.
CAUTION:
●
The above check should be performed after motor relay
unit inspection to make sure relay operates normally.
●
Limit actuator drive motor operation to 4 seconds or less to
prevent heating.
●
Motor counter electromotive force duration is based on the
time at an ambient temperature of 20
°
C with 12V battery
voltage. If battery voltage or the ambient temperature is
lower, time will be slightly shorter.
Symptom 1 ABS Works Frequently.
EFS001ZT
Inspection Procedure
1.
STARTING INSPECTION
Inspect wheel sensor system.
●
Sensor mounting inspection
●
Sensor pick-up inspection for iron chips
●
Sensor rotor inspection (e.g. Number of teeth, damaged teeth)
●
Sensor connector engagement inspection
OK or NG
OK
>> GO TO 2.
NG
>> Repair wheel sensor and rotor system.
2.
CHECKING FOR LOOSENESS
Check for looseness of front and rear axle. Refer to front axle
FAX-4, "WHEEL BEARING INSPECTION"
, rear
axle
RAX-5, "WHEEL BEARING INSPECTION"
.
OK or NG
OK
>> GO TO
BRC-62, "Symptom 2 Unexpected Pedal Reaction"
NG
>> Axle inspection and repair
Symptom 2 Unexpected Pedal Reaction
EFS001ZU
Inspection Procedure
1.
BRAKE PEDAL STROKE INSPECTION
Check brake pedal stroke.
Is stroke excessively long?
YES
>> Check bleeding and brake system.
NO
>> GO TO 2.
SFIA0883E
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