Infiniti QX56 (Z62). Manual — part 856

LAN

LAN-1

ELECTRICAL & POWER CONTROL

C

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SECTION

LAN

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CONTENTS

LAN SYSTEM

CAN FUNDAMENTAL

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

7

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

7

Precautions for Trouble Diagnosis . . . . . . ....

7

Precautions for Harness Repair . . . . . . . ....

7

SYSTEM DESCRIPTION . . . . . . . ..

8

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

8

CAN COMMUNICATION SYSTEM . . . . . . .....

8

CAN COMMUNICATION SYSTEM : System De-
scription . . . . . . . . . . . . . . . . .....

8

CAN COMMUNICATION SYSTEM : System Dia-
gram . . . . . . . . . . . . . . . . . . ..

8

CAN COMMUNICATION SYSTEM : CAN Com-
munication Control Circuit . . . . . . . . . .....

9

DIAG ON CAN . . . . . . . . . . . . . . .....

9

DIAG ON CAN : Description . . . . . . . . .....

9

DIAG ON CAN : System Diagram . . . . . . ...

10

TROUBLE DIAGNOSIS . . . . . . . . . .

11

Condition of Error Detection . . . . . . . . .

11

Symptom When Error Occurs in CAN Communi-
cation System . . . . . . . . . . . . . . ..

11

CAN Diagnosis with CONSULT-III . . . . . . ..

14

Self-Diagnosis . . . . . . . . . . . . . . .

15

CAN Diagnostic Support Monitor . . . . . . .

15

How to Use CAN Communication Signal Chart . ..

17

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

18

DIAGNOSIS AND REPAIR WORKFLOW . . .

18

Trouble Diagnosis Flow Chart . . . . . . . . .

18

Trouble Diagnosis Procedure . . . . . . . . ..

18

CAN

HOW TO USE THIS MANUAL . . . . . .

23

HOW TO USE THIS SECTION . . . . . . ...

23

Caution . . . . . . . . . . . . . . . . .

23

Abbreviation List . . . . . . . . . . . . . ..

23

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

24

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

24

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

24

Precautions for Trouble Diagnosis . . . . . . ..

24

Precautions for Harness Repair . . . . . . . ..

24

SYSTEM DESCRIPTION . . . . . . . .

26

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

26

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

26

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

27

CAN COMMUNICATION SYSTEM . . . . . . .

27

CAN COMMUNICATION SYSTEM : CAN System
Specification Chart . . . . . . . . . . . . ..

27

CAN COMMUNICATION SYSTEM : CAN Com-
munication Signal Chart . . . . . . . . . . ..

28

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

33

CAN SYSTEM (WITH ICC) . . . . . . . ...

33

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

33

CAN SYSTEM (WITHOUT ICC) . . . . . .

46

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

46

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

56

DIAGNOSIS AND REPAIR WORKFLOW . .

56

Interview Sheet . . . . . . . . . . . . . .

56

DTC/CIRCUIT DIAGNOSIS . . . . . . .

57

MALFUNCTION AREA CHART . . . . . .

57

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

57

CAN Communication Circuit . . . . . . . . .

57

LAN-2

ITS Communication Circuit . . . . . . . . . .

58

MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT . . . . . . . . . . . . . . . . ...

60

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

60

MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT . . . . . . . . . . . . . . . . ...

61

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

61

MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT . . . . . . . . . . . . . . . . ...

62

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

62

MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT . . . . . . . . . . . . . . . . ...

63

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

63

MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT . . . . . . . . . . . . . . . .

64

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

64

MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT . . . . . . . . . . . . . . . .

65

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

65

MAIN LINE BETWEEN LANE AND APA CIR-
CUIT . . . . . . . . . . . . . . . . ...

67

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

67

ECM BRANCH LINE CIRCUIT . . . . . . ..

68

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

68

4WD BRANCH LINE CIRCUIT . . . . . . ..

69

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

69

ABS BRANCH LINE CIRCUIT . . . . . . ..

70

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

70

TCM BRANCH LINE CIRCUIT . . . . . . ..

71

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

71

A-BAG BRANCH LINE CIRCUIT . . . . . ..

72

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

72

AFS BRANCH LINE CIRCUIT . . . . . . ...

73

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

73

AV BRANCH LINE CIRCUIT . . . . . . . .

74

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

74

BCM BRANCH LINE CIRCUIT . . . . . . ..

75

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

75

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) . . . . . . . . .

76

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

76

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) . . . . . . . . .

77

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

77

DLC BRANCH LINE CIRCUIT . . . . . . ..

78

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

78

HVAC BRANCH LINE CIRCUIT . . . . . .

79

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

79

M&A BRANCH LINE CIRCUIT . . . . . . ..

80

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

80

STRG BRANCH LINE CIRCUIT . . . . . .

81

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

81

TPMS BRANCH LINE CIRCUIT . . . . . .

82

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

82

IPDM-E BRANCH LINE CIRCUIT . . . . . .

83

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

83

ADP BRANCH LINE CIRCUIT . . . . . . ..

84

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

84

PSB BRANCH LINE CIRCUIT . . . . . . ..

85

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

85

E-SUS BRANCH LINE CIRCUIT . . . . . ...

86

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

86

ICC BRANCH LINE CIRCUIT . . . . . . .

87

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

87

PWBD BRANCH LINE CIRCUIT . . . . . ...

88

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

88

RDR-R BRANCH LINE CIRCUIT . . . . . ..

89

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

89

RDR-L BRANCH LINE CIRCUIT . . . . . ...

90

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

90

LANE BRANCH LINE CIRCUIT . . . . . .

91

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

91

APA BRANCH LINE CIRCUIT . . . . . . ..

92

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

92

LASER BRANCH LINE CIRCUIT . . . . . ..

93

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

93

CAN COMMUNICATION CIRCUIT . . . . ...

94

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

94

CAN COMMUNICATION CIRCUIT 1 . . . .

96

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

96

CAN COMMUNICATION CIRCUIT 2 . . . .

98

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

98

ITS COMMUNICATION CIRCUIT . . . . . .

100

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

100

CAN GATEWAY

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

102

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

102

LAN

LAN-3

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

102

SYSTEM DESCRIPTION . . . . . . ...

103

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

103

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

103

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

104

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

104

DIAGNOSIS SYSTEM (CAN GATEWAY) . ...

105

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

105

ECU DIAGNOSIS INFORMATION . . .

106

CAN GATEWAY . . . . . . . . . . . ...

106

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

106

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

106

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

106

WIRING DIAGRAM . . . . . . . . .

108

CAN GATEWAY SYSTEM . . . . . . . ...

108

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

108

BASIC INSPECTION . . . . . . . . .

110

ADDITIONAL SERVICE WHEN REPLACING
CAN GATEWAY . . . . . . . . . . . ...

110

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

110

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

110

CONFIGURATION (CAN GATEWAY) . . . .

111

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

111

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

111

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

113

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

113

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

113

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

113

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

113

U1010 CONTROL UNIT (CAN) . . . . . .

114

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

114

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

114

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

114

B2600 CONFIG ERROR . . . . . . . . ..

115

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

115

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

115

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

115

POWER SUPPLY AND GROUND CIRCUIT .

116

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

116

REMOVAL AND INSTALLATION . . . .

117

CAN GATEWAY . . . . . . . . . . . ...

117

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

117

CAN SYSTEM (TYPE 1)

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

118

MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT . . . . . . . . . . . . . . . .

118

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

118

MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT . . . . . . . . . . . . . . . .

119

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

119

MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT . . . . . . . . . . . . . . . .

120

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

120

ECM BRANCH LINE CIRCUIT . . . . . ...

121

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

121

ABS BRANCH LINE CIRCUIT . . . . . .

122

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

122

TCM BRANCH LINE CIRCUIT . . . . . .

123

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

123

A-BAG BRANCH LINE CIRCUIT . . . . .

124

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

124

AV BRANCH LINE CIRCUIT . . . . . . ..

125

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

125

BCM BRANCH LINE CIRCUIT . . . . . ...

126

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

126

DLC BRANCH LINE CIRCUIT . . . . . .

127

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

127

HVAC BRANCH LINE CIRCUIT . . . . . .

128

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

128

M&A BRANCH LINE CIRCUIT . . . . . ...

129

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

129

STRG BRANCH LINE CIRCUIT . . . . . .

130

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

130

TPMS BRANCH LINE CIRCUIT . . . . . .

131

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

131

IPDM-E BRANCH LINE CIRCUIT . . . . ...

132

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

132

ADP BRANCH LINE CIRCUIT . . . . . .

133

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

133

E-SUS BRANCH LINE CIRCUIT . . . . .

134

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

134

PWBD BRANCH LINE CIRCUIT . . . . .

135

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

135

CAN COMMUNICATION CIRCUIT . . . . .

136

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

136

LAN-4

CAN SYSTEM (TYPE 2)

DTC/CIRCUIT DIAGNOSIS . . . . . .

138

MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT . . . . . . . . . . . . . . . . .

138

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

138

MAIN LINE BETWEEN ADP AND PWBD CIR-
CUIT . . . . . . . . . . . . . . . . .

139

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

139

MAIN LINE BETWEEN RDR-R AND RDR-L
CIRCUIT . . . . . . . . . . . . . . ...

140

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

140

MAIN LINE BETWEEN RDR-L AND LANE
CIRCUIT . . . . . . . . . . . . . . ...

141

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

141

MAIN LINE BETWEEN LANE AND APA CIR-
CUIT . . . . . . . . . . . . . . . . .

143

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

143

ECM BRANCH LINE CIRCUIT . . . . . .

144

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

144

ABS BRANCH LINE CIRCUIT . . . . . .

145

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

145

TCM BRANCH LINE CIRCUIT . . . . . .

146

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

146

A-BAG BRANCH LINE CIRCUIT . . . . .

147

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

147

AFS BRANCH LINE CIRCUIT . . . . . . .

148

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

148

AV BRANCH LINE CIRCUIT . . . . . . ...

149

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

149

BCM BRANCH LINE CIRCUIT . . . . . .

150

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

150

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 1) . . . . . . . ...

151

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

151

CGW BRANCH LINE CIRCUIT (CAN COM-
MUNICATION CIRCUIT 2) . . . . . . . ...

152

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

152

DLC BRANCH LINE CIRCUIT . . . . . . .

153

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

153

HVAC BRANCH LINE CIRCUIT . . . . . ..

154

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

154

M&A BRANCH LINE CIRCUIT . . . . . .

155

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

155

STRG BRANCH LINE CIRCUIT . . . . . ..

156

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

156

TPMS BRANCH LINE CIRCUIT . . . . . ...

157

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

157

IPDM-E BRANCH LINE CIRCUIT . . . . .

158

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

158

ADP BRANCH LINE CIRCUIT . . . . . . .

159

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

159

PSB BRANCH LINE CIRCUIT . . . . . . .

160

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

160

E-SUS BRANCH LINE CIRCUIT . . . . . ..

161

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

161

ICC BRANCH LINE CIRCUIT . . . . . . ...

162

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

162

PWBD BRANCH LINE CIRCUIT . . . . . ..

163

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

163

RDR-R BRANCH LINE CIRCUIT . . . . . .

164

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

164

RDR-L BRANCH LINE CIRCUIT . . . . . ..

165

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

165

LANE BRANCH LINE CIRCUIT . . . . . ...

166

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

166

APA BRANCH LINE CIRCUIT . . . . . . .

167

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

167

LASER BRANCH LINE CIRCUIT . . . . . .

168

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

168

CAN COMMUNICATION CIRCUIT 1 . . . ...

169

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

169

CAN COMMUNICATION CIRCUIT 2 . . . ...

171

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

171

ITS COMMUNICATION CIRCUIT . . . . . .

173

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

173

CAN SYSTEM (TYPE 3)

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

175

MAIN LINE BETWEEN ABS AND DLC CIR-
CUIT . . . . . . . . . . . . . . . . ..

175

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

175

MAIN LINE BETWEEN DLC AND E-SUS CIR-
CUIT . . . . . . . . . . . . . . . . ..

176

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

176

MAIN LINE BETWEEN E-SUS AND ADP CIR-
CUIT . . . . . . . . . . . . . . . . ..

177

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

177

ECM BRANCH LINE CIRCUIT . . . . . . .

178