Infiniti I30 (A33). Manual — part 139
5. Pedal Vibration and Noise
=NHBR0069
1
INSPECTION START
Pedal vibration and noise inspection
SAT797A
©
GO TO 2.
2
CHECK SYMPTOM
1. Apply brake.
2. Start engine.
Does the symptom appear only when engine is started?
Yes
©
Carry out self-diagnosis. Refer to BR-91, 94.
No
©
GO TO 3.
3
RECHECK SYMPTOM
Does the symptom appear when electrical equipment switches (such as headlamp) are operated?
Yes
©
GO TO 4.
No
©
Go to “3. CHECK WARNING LAMP INDICATION” in “2. Unexpected Pedal Action”,
BR-136.
4
CHECK WHEEL SENSOR
Check wheel sensor shield ground. For location of shield ground, refer to wiring diagram and “HARNESS LAYOUT” in EL
section.
Is wheel sensor shield grounded properly?
Yes
©
Check control unit pin terminals for damage or the connection of control unit harness
connector. Reconnect control unit harness connector. Then retest.
No
©
Repair.
NOTE:
ABS may operate and cause vibration under any of the following
conditions.
I
Applying brake gradually when shifting or operating clutch.
I
Low friction (slippery) road.
I
High speed cornering.
I
Driving over bumps and pot holes.
I
Engine speed is over 5,000 rpm with vehicle stopped.
GI
MA
EM
LC
EC
FE
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
TCS
5. Pedal Vibration and Noise
BR-139
6. ABS Warning Lamp Does Not Come On
When Ignition Switch Is Turned On
=NHBR0074
1
INSPECTION START
Warning lamp circuit inspection
SBR334EB
©
GO TO 2.
2
CHECK FUSE
Check 10A fuse No. 30 for warning lamp. For fuse layout, refer to “POWER SUPPLY ROUTING” in EL section.
Is fuse OK?
Yes
©
GO TO 3.
No
©
Replace fuse.
TROUBLE DIAGNOSES FOR SYMPTOMS
TCS
6. ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On
BR-140
3
CHECK ABS CONTROL UNIT POWER SUPPLY CIRCUIT
1. Install 10A fuse.
2. Remove solenoid valve relay.
3. Disconnect connectors from control unit and actuator.
4. Check voltage between control unit connector terminal 30 and ground after turning ignition switch “ON”.
SBR715DD
Does battery voltage exist after turning ignition switch “ON”?
Yes
©
GO TO 5.
No
©
GO TO 4.
4
CHECK WARNING LAMP
Check warning lamp bulb.
Is warning lamp bulb OK?
Yes
©
Repair harness and connectors between fuse and control unit connector terminal 30
(including combination meter).
No
©
Replace bulb.
GI
MA
EM
LC
EC
FE
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSES FOR SYMPTOMS
TCS
6. ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On (Cont’d)
BR-141
5
CHECK CIRCUIT
1. Remove solenoid valve relay.
2. Check continuity between control unit terminals and solenoid valve relay terminals.
MTBL0091
NOTE:
Pay attention to tester polarity.
Specifications may vary depending on the type of tester.
Before performing this inspection, refer to the instruction manual of the tester.
SBR105EF
Does continuity exist?
Yes
©
GO TO 6.
No
©
Check the following.
I
Harness connectors E33, E91
I
Harness for open or short between solenoid valve relay terminal (relay box side) and
control unit
6
CHECK SOLENOID VALVE RELAY
Refer to “8. CHECK SOLENOID VALVE RELAY”, “Solenoid Valve Relay”, BR-114.
Is solenoid valve relay OK?
Yes
©
Go to “Low Voltage”, BR-126.
No
©
Replace solenoid valve relay.
TROUBLE DIAGNOSES FOR SYMPTOMS
TCS
6. ABS Warning Lamp Does Not Come On When Ignition Switch Is Turned On (Cont’d)
BR-142
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