Infiniti G20 (P11). Manual — part 106
SRA690A
REAR WHEEL BEARING
NCAX0027
I
Check axial end play.
Axial end play:
0.05 mm (0.0020 in) or less
I
Check that wheel hub bearings operate smoothly.
I
Check tightening torque of wheel bearing lock nut.
: 186 - 255 N·m (19 - 26 kg-m, 137 - 188 ft-lb)
I
Replace wheel bearing assembly if there is axial end play or
wheel bearing does not turn smoothly. Refer to “Wheel Hub”,
“REAR AXLE”, AX-21.
Wheel Hub
COMPONENTS
NCAX0028
SRA790AB
1.
Spindle
2.
Baffle plate
3.
Wheel hub bearing
4.
Wheel bearing lock nut
5.
Cotter pin
6.
Hub cap
7.
ABS sensor
REMOVAL
NCAX0029
CAUTION:
I
Before removing the rear wheel hub assembly, disconnect
the ABS wheel sensor from the assembly. Then move it
away from the hub assembly. Failure to do so may result
in damage to the sensor wires and the sensor becoming
inoperative.
I
Wheel hub bearing does not require maintenance. If any of
the following symptoms are noted, replace wheel hub
bearing assembly.
GI
MA
EM
LC
EC
FE
CL
MT
AT
SU
BR
ST
RS
BT
HA
SC
EL
IDX
REAR AXLE
On-vehicle Service (Cont’d)
AX-21
I
Growling noise is emitted from wheel hub bearing during
operation.
I
Wheel hub bearing drags or turns roughly. This occurs
when turning hub by hand after bearing lock nut is tight-
ened to specified torque.
SRA711A
1.
Remove brake caliper assembly.
2.
Remove wheel bearing lock nut.
3.
Remove brake rotor.
4.
Remove wheel hub bearing from spindle.
Brake hose does not need to be disconnected from brake
caliper.
Suspend caliper assembly with wire so as not to stretch brake
hose.
Be careful not to depress brake pedal, or piston will pop out.
Make sure brake hose is not twisted.
SRA712A
INSTALLATION
NCAX0030
I
Install wheel hub bearing.
I
Tighten wheel bearing lock nut.
Before tightening, apply oil to threaded portion of rear spindle
and both sides of plain washer.
: 186 - 255 N·m (19 - 26 kg-m, 137 - 188 ft-lb)
I
Check that wheel bearings operate smoothly.
SRA690A
I
Check wheel hub bearing axial end play.
Axial end play:
0.05 mm (0.0020 in) or less
Service Data and Specifications (SDS)
WHEEL BEARING (REAR)
NCAX0031
Wheel bearing axial end play
mm (in)
0.05 (0.0020) or less
Wheel bearing lock nut tightening torque
N·m (kg-m, ft-lb)
186 - 255 (19 - 26, 137 - 188)
REAR AXLE
Wheel Hub (Cont’d)
AX-22
BRAKE SYSTEM
CONTENTS
PRECAUTIONS . . . . . . . . . . . . . . . ...3
Supplemental Restraint System (SRS)
. . . ...3
Precautions for Brake System. . . . . . . . . .3
Wiring Diagrams and Trouble Diagnosis. . . . . .4
PREPARATION . . . . . . . . . . . . . . . ...5
Commercial Service Tools . . . . . . . . . . ...5
NOISE, VIBRATION AND HARSHNESS (NVH)
TROUBLESHOOTING . . . . . . . . . . . . . .6
NVH Troubleshooting Chart. . . . . . . . . . .6
ON-VEHICLE SERVICE . . . . . . . . . . . . ..7
Checking Brake Fluid Level. . . . . . . . . . .7
Checking Brake Line . . . . . . . . . . . . ...7
Changing Brake Fluid . . . . . . . . . . . . ..7
Brake Burnishing Procedure. . . . . . . . . . 7
Bleeding Brake System . . . . . . . . . . . ...8
BRAKE HYDRAULIC LINE . . . . . . . . . . . .9
Hydraulic Circuit. . . . . . . . . . . . . . ...9
Removal. . . . . . . . . . . . . . . . . ...9
Inspection. . . . . . . . . . . . . . . . . .9
Installation. . . . . . . . . . . . . . . . ..10
DUAL PROPORTIONING VALVE. . . . . . . . . 11
Inspection. . . . . . . . . . . . . . . . ... 11
BRAKE PEDAL AND BRACKET. . . . . . . . ..12
Removal and Installation . . . . . . . . . . ...12
Inspection. . . . . . . . . . . . . . . . ...12
Adjustment . . . . . . . . . . . . . . . . .12
MASTER CYLINDER. . . . . . . . . . . . . .14
Removal. . . . . . . . . . . . . . . . . .14
Disassembly. . . . . . . . . . . . . . . ...14
Inspection. . . . . . . . . . . . . . . . ...15
Assembly . . . . . . . . . . . . . . . . ...15
Installation. . . . . . . . . . . . . . . . ..16
BRAKE BOOSTER. . . . . . . . . . . . . . 17
On-vehicle Service. . . . . . . . . . . . . .17
. . . . . . . . . . . ...17
. . . . . . . . . . . . ...17
Removal. . . . . . . . . . . . . . . . . .17
Inspection. . . . . . . . . . . . . . . . ...17
. . . . . . . ..17
Installation. . . . . . . . . . . . . . . . ..18
VACUUM HOSE. . . . . . . . . . . . . . . .19
Removal and Installation . . . . . . . . . . ...19
Inspection. . . . . . . . . . . . . . . . ...19
. . . . . . . . ...19
. . . . . . . . . . . . . . 19
FRONT DISC BRAKE . . . . . . . . . . . . ...20
Component . . . . . . . . . . . . . . . . 20
Pad Replacement . . . . . . . . . . . . . ..20
Removal. . . . . . . . . . . . . . . . . .21
Disassembly. . . . . . . . . . . . . . . ...21
Inspection. . . . . . . . . . . . . . . . ...21
. . . . . . . . . . . . . . . . .21
. . . . . . . . . . . . . . . . ...22
Assembly . . . . . . . . . . . . . . . . ...23
Installation. . . . . . . . . . . . . . . . ..23
REAR DISC BRAKE. . . . . . . . . . . . . ..24
Component . . . . . . . . . . . . . . . . 24
Pad Replacement . . . . . . . . . . . . . ..24
Removal. . . . . . . . . . . . . . . . . .26
Disassembly. . . . . . . . . . . . . . . ...27
Inspection. . . . . . . . . . . . . . . . ...28
. . . . . . . . . . . . . . . . .28
. . . . . . . . . . . . . . . . ...28
Assembly . . . . . . . . . . . . . . . . ...29
Installation. . . . . . . . . . . . . . . . ..31
PARKING BRAKE CONTROL . . . . . . . . . ..32
Components. . . . . . . . . . . . . . . ...32
Removal and Installation . . . . . . . . . . ...32
Inspection. . . . . . . . . . . . . . . . ...33
Adjustment . . . . . . . . . . . . . . . . .33
ABS
DESCRIPTION . . . . . . . . . . . . . . . ...34
Purpose. . . . . . . . . . . . . . . . . ..34
ABS (Anti-Lock Brake System) Operation . . . . 34
ABS Hydraulic Circuit . . . . . . . . . . . . 34
System Components . . . . . . . . . . . . .35
GI
MA
EM
LC
EC
FE
CL
MT
AT
AX
SU
ST
RS
BT
HA
SC
EL
IDX
System Description. . . . . . . . . . . . . 35
. . . . . . . . . . . . . . . . .35
. . . . . . . . . . . . . ..35
ABS ACTUATOR AND ELECTRIC UNIT
. . . . . 35
Component Parts and Harness Connector
Location . . . . . . . . . . . . . . . . . .37
Schematic . . . . . . . . . . . . . . . . ..38
Wiring Diagram - ABS - . . . . . . . . . . . .39
ON BOARD DIAGNOSTIC SYSTEM
DESCRIPTION . . . . . . . . . . . . . . . ...42
Self-diagnosis . . . . . . . . . . . . . . . 42
. . . . . . . . . . . . . . . ..42
HOW TO READ SELF-DIAGNOSTIC RESULTS
(MALFUNCTION CODES)
. . . . . . . . . . 42
HOW TO ERASE SELF-DIAGNOSTIC RESULTS
(MALFUNCTION CODES)
. . . . . . . . . . 43
CONSULT-II . . . . . . . . . . . . . . . ...44
ECU (ABS CONTROL UNIT) PART NUMBER
MODE
. . . . . . . . . . . . . . . . . .44
CONSULT-II Inspection Procedure. . . . . . . 44
. . . . . ...46
. . . . . . . . 47
. . . . . . . . . 48
. . . . . . . . . . ...49
. . . . . . . . . . . ...49
TROUBLE DIAGNOSIS - INTRODUCTION. . . . ..50
How to Perform Trouble Diagnoses for Quick
and Accurate Repair . . . . . . . . . . . . ..50
. . . . . . . . . . . . . ..50
TROUBLE DIAGNOSIS - BASIC INSPECTION . . ...51
Preliminary Check. . . . . . . . . . . . . ..51
Ground Circuit Check . . . . . . . . . . . . 54
ABS ACTUATOR AND ELECTRIC UNIT GROUND
. .54
TROUBLE DIAGNOSIS - GENERAL
DESCRIPTION . . . . . . . . . . . . . . . ...55
Malfunction Code/Symptom Chart. . . . . . . .55
TROUBLE DIAGNOSES FOR SELF-DIAGNOSTIC
ITEMS. . . . . . . . . . . . . . . . . . . .56
Wheel Sensor or Rotor. . . . . . . . . . . ..56
. . . . . . . . . .56
ABS Actuator Solenoid Valve or Solenoid Valve
Relay. . . . . . . . . . . . . . . . . . ..59
. . . . . . . . . .59
Motor Relay or Motor. . . . . . . . . . . . .62
. . . . . . . . . .62
Low Voltage . . . . . . . . . . . . . . . ...64
. . . . . . . . . .64
Control Unit. . . . . . . . . . . . . . . . 66
. . . . . . . . . .66
TROUBLE DIAGNOSES FOR SYMPTOMS . . . . .67
1. ABS Works Frequently . . . . . . . . . . ..67
2. Unexpected Pedal Action . . . . . . . . . ..67
3. Long Stopping Distance . . . . . . . . . . 68
4. ABS Does Not Work. . . . . . . . . . . ..69
5. Pedal Vibration and Noise. . . . . . . . . .70
6. ABS Warning Lamp Does Not Come On
When Ignition Switch Is Turned On. . . . . . ...71
7. ABS Warning Lamp Stays On When Ignition
Switch Is Turned On . . . . . . . . . . . . ..73
REMOVAL AND INSTALLATION . . . . . . . . .75
Front Wheel Sensors. . . . . . . . . . . . .75
Rear Wheel Sensors . . . . . . . . . . . . .76
ABS Actuator and Electric Unit. . . . . . . . ..77
. . . . . . . . . . . . . . . ...77
. . . . . . . . . . . . . . 77
Sensor Rotor. . . . . . . . . . . . . . . ..78
. . . . . . . . . . . . . . . ...78
. . . . . . . . . . . . . . 78
SERVICE DATA AND SPECIFICATIONS (SDS) . . .79
General Specifications. . . . . . . . . . . ...79
Disc Brake . . . . . . . . . . . . . . . . .79
Brake Pedal . . . . . . . . . . . . . . . ...79
Parking Brake . . . . . . . . . . . . . . . 79
CONTENTS
(Cont’d)
BR-2
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