Infiniti QX56 (Z62). Manual - part 129

 

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Infiniti QX56 (Z62). Manual - part 129

 

 

BRC-1

BRAKES

C

D

E

G

H

I

J

K

L

M

SECTION 

BRC

A

B

BRC

N

O

P

CONTENTS

BRAKE CONTROL SYSTEM

WITH VDC

PRECAUTION ...............................................

5

PRECAUTIONS ...................................................

5

Precaution for Supplemental Restraint System 
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" .................................................................
..

5

Precaution Necessary for Steering Wheel Rota-
tion after Battery Disconnect  ...................................
..

5

Precaution for Procedure without Cowl Top Cover 

......

6

Precaution for Brake System  ....................................

6

Precaution for Brake Control System ........................

6

Precaution for Harness Repair ..................................

7

PREPARATION ............................................

9

PREPARATION ...................................................

9

Commercial Service Tools  ........................................

9

SYSTEM DESCRIPTION  .............................

10

COMPONENT PARTS  .......................................

10

Component Parts Location ......................................

10

Component Description ...........................................

13

ABS Actuator and Electric Unit (Control Unit)  .........

14

Wheel Sensor and Sensor Rotor  ............................

14

Stop Lamp Switch  ...................................................

15

Steering Angle Sensor  ............................................

15

Yaw Rate/Side/Decel G sensor ...............................

15

Brake Fluid Level Switch .........................................

15

Parking Brake Switch  ..............................................

15

VDC OFF Switch  .....................................................

15

SYSTEM .............................................................

16

System Description  .................................................

16

Fail-safe ..................................................................

25

Protection Function  .................................................

28

VDC FUNCTION  ........................................................

28

VDC FUNCTION : System Description  ...................

28

TCS FUNCTION .........................................................

31

TCS FUNCTION : System Description ....................

31

ABS FUNCTION  ........................................................

32

ABS FUNCTION : System Description ....................

33

EBD FUNCTION  ........................................................

34

EBD FUNCTION : System Description ....................

34

HILL START ASSIST FUNCTION  .............................

36

hill start assist FUNCTION : System Description ....

36

BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) 
FUNCTION .................................................................

37

BRAKE LIMITED SLIP DIFFERENTIAL (BLSD) 
FUNCTION : System Description  ............................

37

DIAGNOSIS SYSTEM [ABS ACTUATOR 
AND ELECTRIC UNIT (CONTROL UNIT)]  .......

40

CONSULT-III Function  ............................................

40

ECU DIAGNOSIS INFORMATION ..............

45

ABS ACTUATOR AND ELECTRIC UNIT 
(CONTROL UNIT)  .............................................

45

Reference Value ......................................................

45

Fail-safe ...................................................................

47

Protection Function ..................................................

50

DTC Inspection Priority Chart ..................................

50

DTC Index  ...............................................................

51

WIRING DIAGRAM  ......................................

53

BRAKE CONTROL SYSTEM  ...........................

53

Wiring Diagram ........................................................

53

BASIC INSPECTION  ...................................

60

DIAGNOSIS AND REPAIR WORK FLOW  .......

60

Work Flow ................................................................

60

Diagnostic Work Sheet  ............................................

61

BRC-2

ADDITIONAL SERVICE WHEN REPLACING 
ABS ACTUATOR AND ELECTRIC UNIT 
(CONTROL UNIT)  ..............................................

63

Description ..............................................................

63

ADJUSTMENT OF STEERING ANGLE SEN-
SOR NEUTRAL POSITION  ...............................

64

Description ..............................................................

64

Work Procedure ......................................................

64

CALIBRATION OF DECEL G SENSOR  ...........

66

Description ..............................................................

66

Work Procedure ......................................................

66

DTC/CIRCUIT DIAGNOSIS .........................

68

C1101, C1102, C1103, C1104 WHEEL SEN-
SOR ....................................................................

68

DTC Logic ...............................................................

68

Diagnosis Procedure  ..............................................

68

C1105, C1106, C1107, C1108 WHEEL SEN-
SOR ....................................................................

70

DTC Logic ...............................................................

70

Diagnosis Procedure  ..............................................

70

C1109 POWER AND GROUND SYSTEM .........

72

Description ..............................................................

72

DTC Logic ...............................................................

72

Diagnosis Procedure  ..............................................

72

C1111 PUMP MOTOR  .......................................

75

DTC Logic ...............................................................

75

Diagnosis Procedure  ..............................................

75

C1115 WHEEL SENSOR ...................................

77

DTC Logic ...............................................................

77

Diagnosis Procedure  ..............................................

77

C1116 STOP LAMP SWITCH ............................

79

DTC Logic ...............................................................

79

Diagnosis Procedure  ..............................................

79

Component Inspection (Stop lamp Switch)  ............

85

Component Inspection (Stop Lamp Relay) .............

86

C1118 TRANSFER CONTROL UNIT  ................

87

DTC Logic ...............................................................

87

Diagnosis Procedure  ..............................................

87

C1120, C1122, C1124, C1126 ABS IN VALVE 
SYSTEM .............................................................

88

DTC Logic ...............................................................

88

Diagnosis Procedure  ..............................................

88

C1121, C1123, C1125, C1127 ABS OUT 
VALVE SYSTEM ................................................

90

DTC Logic ...............................................................

90

Diagnosis Procedure  ..............................................

90

C1130 ENGINE SIGNAL  ...................................

92

DTC Logic ...............................................................

92

Diagnosis Procedure ...............................................

92

C1140 ACTUATOR RELAY SYSTEM  ..............

93

DTC Logic  ...............................................................

93

Diagnosis Procedure ...............................................

93

C1142 PRESS SENSOR  ...................................

95

DTC Logic  ...............................................................

95

Diagnosis Procedure ...............................................

95

C1143 STEERING ANGLE SENSOR  ...............

97

DTC Logic  ...............................................................

97

Diagnosis Procedure ...............................................

97

C1144 INCOMPLETE STEERING ANGLE 
SENSOR ADJUSTMENT  ..................................

99

DTC Logic  ...............................................................

99

Diagnosis Procedure ...............................................

99

C1145, C1146 YAW RATE/SIDE/DECEL G 
SENSOR ...........................................................

100

DTC Logic  .............................................................

100

Diagnosis Procedure .............................................

100

C1155 BRAKE FLUID LEVEL SWITCH  ..........

103

DTC Logic  .............................................................

103

Diagnosis Procedure .............................................

103

Component Inspection  ..........................................

104

C1160 DECEL G SEN SET  ..............................

105

DTC Logic  .............................................................

105

Diagnosis Procedure .............................................

105

C1164, C1165 CV SYSTEM  .............................

106

DTC Logic  .............................................................

106

Diagnosis Procedure .............................................

106

C1166, C1167 SV SYSTEM  .............................

108

DTC Logic  .............................................................

108

Diagnosis Procedure .............................................

108

C1170 VARIANT CODING  ...............................

110

DTC Logic  .............................................................

110

Diagnosis Procedure .............................................

110

C118E ACCUMULATOR  ..................................

111

DTC Logic  .............................................................

111

Diagnosis Procedure .............................................

111

U1000 CAN COMM CIRCUIT  ...........................

112

Description ............................................................

112

DTC Logic  .............................................................

112

Diagnosis Procedure .............................................

112

POWER SUPPLY AND GROUND CIRCUIT  ....

113

Description ............................................................

113

Diagnosis Procedure .............................................

113

PARKING BRAKE SWITCH .............................

117

Component Function Check  .................................

117

Diagnosis Procedure .............................................

117

Component Inspection  ..........................................

118

BRC-3

C

D

E

G

H

I

J

K

L

M

A

B

BRC

N

O

P

VDC OFF SWITCH  ...........................................

119

Component Function Check ..................................

119

Diagnosis Procedure .............................................

119

Component Inspection  ..........................................

120

ABS WARNING LAMP .....................................

122

Component Function Check ..................................

122

Diagnosis Procedure .............................................

122

BRAKE WARNING LAMP  ...............................

123

Component Function Check ..................................

123

Diagnosis Procedure .............................................

123

VDC WARNING LAMP .....................................

125

Component Function Check ..................................

125

Diagnosis Procedure .............................................

125

VDC OFF INDICATOR LAMP  ..........................

126

Component Function Check ..................................

126

Diagnosis Procedure .............................................

126

SYMPTOM DIAGNOSIS  ............................

127

EXCESSIVE OPERATION FREQUENCY ........

127

Description ............................................................

127

Diagnosis Procedure .............................................

127

UNEXPECTED BRAKE PEDAL REACTION ...

128

Description ............................................................

128

Diagnosis Procedure .............................................

128

THE BRAKING DISTANCE IS LONG  ..............

129

Description ............................................................

129

Diagnosis Procedure .............................................

129

DOES NOT OPERATE .....................................

130

Description ............................................................

130

Diagnosis Procedure .............................................

130

BRAKE PEDAL VIBRATION OR OPERA-
TION SOUND OCCURS  ...................................

131

Description ............................................................

131

Diagnosis Procedure .............................................

131

VEHICLE JERKS DURING  ..............................

132

Description ............................................................

132

Diagnosis Procedure .............................................

132

NORMAL OPERATING CONDITION ...............

133

Description ............................................................

133

REMOVAL AND INSTALLATION .............

134

WHEEL SENSOR .............................................

134

FRONT WHEEL SENSOR .......................................

134

FRONT WHEEL SENSOR : Exploded View  .........

134

FRONT WHEEL SENSOR : Removal and Instal-
lation ......................................................................

134

REAR WHEEL SENSOR  .........................................

135

REAR WHEEL SENSOR : Exploded View  ...........

135

REAR WHEEL SENSOR : Removal and Installa-
tion .........................................................................

135

SENSOR ROTOR ............................................

136

FRONT SENSOR ROTOR  .......................................

136

FRONT SENSOR ROTOR : Removal and Instal-
lation ......................................................................

136

REAR SENSOR ROTOR  .........................................

136

REAR SENSOR ROTOR : Removal and Installa-
tion .........................................................................

136

ABS ACTUATOR AND ELECTRIC UNIT 
(CONTROL UNIT)  ...........................................

137

Removal and Installation  .......................................

137

YAW RATE/SIDE/DECEL G SENSOR  ...........

138

Exploded View .......................................................

138

Removal and Installation  .......................................

138

STEERING ANGLE SENSOR .........................

139

Removal and Installation  .......................................

139

VDC OFF SWITCH ..........................................

140

Removal and Installation  .......................................

140

BRAKE ASSIST (WITH PREVIEW FUNC-

TION)

PRECAUTION ............................................

141

PRECAUTIONS ...............................................

141

Precautions for Preview Function Service .............

141

SYSTEM DESCRIPTION  ...........................

142

COMPONENT PARTS  ....................................

142

Component Parts Location  ....................................

142

Component Description  .........................................

143

SYSTEM ..........................................................

145

BRAKE ASSIST (WITH PREVIEW FUNCTION)  .....

145

BRAKE ASSIST (WITH PREVIEW FUNCTION) : 
System Description ................................................

145

DTC/CIRCUIT DIAGNOSIS  .......................

146

BRAKE ASSIST (WITH PREVIEW FUNC-
TION) ...............................................................

146

Diagnosis Procedure  .............................................

146

SYMPTOM DIAGNOSIS  ............................

147

NORMAL OPERATING CONDITION  .............

147

Description .............................................................

147

INTELLIGENT BRAKE ASSIST

PRECAUTION ............................................

148

PRECAUTIONS ...............................................

148

Precautions for IBA System Service ......................

148

 

 

 

 

 

 

 

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