Infiniti QX56 (JA60). Manual - part 122

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SECTION 

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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 .................................................

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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"

.