Infiniti QX56 (Z62). Manual - part 856

LAN

LAN-1

ELECTRICAL & POWER CONTROL

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SECTION 

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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