Infiniti QX56 (JA60). Manual — part 122

BRC-1

BRAKES

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SECTION

BRC

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BRC

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CONTENTS

BRAKE CONTROL SYSTEM

VDC/TCS/ABS

BASIC INSPECTION . . . . . . . . .

4

DIAGNOSIS AND REPAIR WORKFLOW . . ..

4

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

4

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

7

INSPECTION AND ADJUSTMENT . . . . . .

8

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT . . . . . . . . . . . . . . ..

8

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Description . . . . . . . . ..

8

ADDITIONAL SERVICE WHEN REPLACING
CONTROL UNIT : Special Repair Requirement . ...

8

ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION . . . . . . . . . . . . ..

8

ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION : Description . . . . . . ..

8

ADJUSTMENT OF STEERING ANGLE SENSOR
NEUTRAL POSITION : Special Repair Require-
ment . . . . . . . . . . . . . . . . . . ..

8

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

9

CALIBRATION OF DECEL G SENSOR : Descrip-
tion . . . . . . . . . . . . . . . . . . ....

9

CALIBRATION OF DECEL G SENSOR : Special
Repair Requirement . . . . . . . . . . . . ..

9

FUNCTION DIAGNOSIS . . . . . . . ..

11

VDC . . . . . . . . . . . . . . . . .

11

System Diagram . . . . . . . . . . . . . ..

11

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

11

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

12

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

13

TCS . . . . . . . . . . . . . . . . . .

14

System Diagram . . . . . . . . . . . . . ..

14

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

14

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

15

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

16

ABS . . . . . . . . . . . . . . . . ...

17

System Diagram . . . . . . . . . . . . . ..

17

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

17

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

18

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

19

EBD . . . . . . . . . . . . . . . . ...

20

System Diagram . . . . . . . . . . . . . ..

20

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

20

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

21

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

22

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

23

CONSULT-III Function (ABS) . . . . . . . . ..

23

COMPONENT DIAGNOSIS . . . . . . .

28

C1101, C1102, C1103, C1104 WHEEL SEN-
SOR-1 . . . . . . . . . . . . . . . .

28

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

28

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

28

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

28

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

30

Special Repair Requirement . . . . . . . . .

30

C1105, C1106, C1107, C1108 WHEEL SEN-
SOR-2 . . . . . . . . . . . . . . . .

31

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

31

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

31

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

31

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

33

Special Repair Requirement . . . . . . . . .

33

C1109 POWER AND GROUND SYSTEM . .

34

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

34

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

34

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

34

Special Repair Requirement . . . . . . . . .

35

BRC-2

C1110, C1170 ABS ACTUATOR AND ELEC-
TRIC UNIT (CONTROL UNIT) . . . . . . ...

36

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

36

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

36

Special Repair Requirement . . . . . . . . ...

36

C1111 ABS MOTOR, MOTOR RELAY SYS-
TEM . . . . . . . . . . . . . . . . .

37

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

37

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

37

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

37

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

38

Special Repair Requirement . . . . . . . . ...

38

C1113, C1145, C1146 YAW RATE/SIDE/DE-
CEL G SENSOR . . . . . . . . . . . .

39

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

39

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

39

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

39

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

40

Special Repair Requirement . . . . . . . . ...

40

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

42

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

42

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

42

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

42

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

43

Special Repair Requirement . . . . . . . . ...

44

C1116 STOP LAMP SWITCH . . . . . . .

45

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

45

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

45

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

45

Special Repair Requirement . . . . . . . . ...

46

C1120, C1122, C1124, C1126 IN ABS SOL . .

47

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

47

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

47

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

47

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

48

Special Repair Requirement . . . . . . . . ...

48

C1121, C1123, C1125, C1127 OUT ABS SOL ...

50

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

50

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

50

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

50

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

51

Special Repair Requirement . . . . . . . . ...

51

C1130, C1131, C1132, C1133, C1136 EN-
GINE SIGNAL . . . . . . . . . . . . .

53

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

53

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

53

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

53

Special Repair Requirement . . . . . . . . ...

53

C1140 ACTUATOR RLY . . . . . . . . ...

55

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

55

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

55

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

55

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

56

Special Repair Requirement . . . . . . . . ...

56

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

57

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

57

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

57

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

57

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

59

C1143, C1144 STEERING ANGLE SENSOR ...

60

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

60

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

60

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

60

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

61

Special Repair Requirement . . . . . . . . ...

61

C1155 BRAKE FLUID LEVEL SWITCH . . ...

63

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

63

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

63

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

63

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

64

Special Repair Requirement . . . . . . . . ...

64

C1156 ST ANG SEN COM CIR . . . . . . .

66

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

66

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

66

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

66

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

67

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

67

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

67

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

67

C1163 ST ANGLE SEN SAFE . . . . . . ..

68

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

68

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

68

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

68

C1164, C1165, C1166, C1167 CV/SV SYS-
TEM . . . . . . . . . . . . . . . . .

69

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

69

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

69

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

69

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

70

Special Repair Requirement . . . . . . . . ...

71

C1178, C1181, C1184, C1189 ABS ACTIVE
BOOSTER . . . . . . . . . . . . . . .

72

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

72

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

72

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

72

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

73

Special Repair Requirement . . . . . . . . ...

73

C1179 ABS DELTA S SEN NG . . . . . . .

75

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

75

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

75

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

75

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

76

Special Repair Requirement . . . . . . . . ...

76

BRC-3

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C1185 ICC UNIT . . . . . . . . . . . . .

77

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

77

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

77

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

77

Special Repair Requirement . . . . . . . . ...

78

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

79

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

79

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

79

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

79

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

80

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

80

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

80

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

80

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

81

Special Repair Requirement . . . . . . . . ...

81

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

82

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

82

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

82

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

82

Special Repair Requirement . . . . . . . . ...

82

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

83

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

83

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

83

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

83

Special Repair Requirement . . . . . . . . ...

83

VDC OFF INDICATOR LAMP . . . . . . .

84

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

84

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

84

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

84

Special Repair Requirement . . . . . . . . ...

85

SLIP INDICATOR LAMP . . . . . . . . .

86

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

86

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

86

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

86

Special Repair Requirement . . . . . . . . ...

86

ECU DIAGNOSIS . . . . . . . . . . .

87

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

87

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

87

Wiring Diagram - BRAKE CONTROL SYSTEM - .

92

Fail-Safe . . . . . . . . . . . . . . . . ..

99

DTC No. Index . . . . . . . . . . . . . ..

100

SYMPTOM DIAGNOSIS . . . . . . .

102

VDC/TCS/ABS . . . . . . . . . . . . ..

102

Symptom Table . . . . . . . . . . . . . .

102

EXCESSIVE ABS FUNCTION OPERATION
FREQUENCY . . . . . . . . . . . . ...

103

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

103

UNEXPECTED PEDAL REACTION . . . ...

104

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

104

THE BRAKING DISTANCE IS LONG . . . .

105

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

105

ABS FUNCTION DOES NOT OPERATE . ...

106

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

106

PEDAL VIBRATION OR ABS OPERATION
SOUND OCCURS . . . . . . . . . . ...

107

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

107

VEHICLE JERKS DURING VDC/TCS/ABS
CONTROL . . . . . . . . . . . . . ...

108

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

108

NORMAL OPERATING CONDITION . . . .

109

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

109

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

110

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

110

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

110

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

110

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

111

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

111

Precaution for CAN System . . . . . . . . ...

112

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

113

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

113

Special Service Tool . . . . . . . . . . . ..

113

Commercial Service Tool . . . . . . . . . ..

113

REMOVAL AND INSTALLATION . . . .

114

WHEEL SENSORS . . . . . . . . . . .

114

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

114

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

115

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

115

ACTUATOR AND ELECTRIC UNIT (ASSEM-
BLY) . . . . . . . . . . . . . . . .

116

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

116

STEERING ANGLE SENSOR . . . . . . .

118

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

118

G SENSOR . . . . . . . . . . . . . ..

119

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

119

BRC-4

< BASIC INSPECTION >

[VDC/TCS/ABS]

DIAGNOSIS AND REPAIR WORKFLOW

BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005147938

PRECAUTIONS FOR DIAGNOSIS

If steering angle sensor, steering system parts, suspension system parts, ABS actuator and electric unit (con-

trol unit) or tires have been replaced, or if wheel alignment has been adjusted, be sure to adjust neutral posi-

tion of steering angle sensor before driving. Refer to

BRC-8, "ADJUSTMENT OF STEERING ANGLE

SENSOR NEUTRAL POSITION : Description"

.