Infiniti QX56 (JA60). Manual - part 925

 

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Infiniti QX56 (JA60). Manual - part 925

 

 

TM-2

On Board Diagnosis Logic ......................................

50

Possible Cause .......................................................

50

DTC Confirmation Procedure  .................................

50

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

51

P0725 ENGINE SPEED  .....................................

53

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

53

CONSULT-III Reference Value in Data Monitor 
Mode ......................................................................
.

53

On Board Diagnosis Logic ......................................

53

Possible Cause .......................................................

53

DTC Confirmation Procedure  .................................

53

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

53

P0731 1GR INCORRECT RATIO  ......................

55

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

55

On Board Diagnosis Logic ......................................

55

Possible Cause .......................................................

55

DTC Confirmation Procedure  .................................

55

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

56

P0732 2GR INCORRECT RATIO  ......................

57

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

57

On Board Diagnosis Logic ......................................

57

Possible Cause .......................................................

57

DTC Confirmation Procedure  .................................

57

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

58

P0733 3GR INCORRECT RATIO  ......................

59

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

59

On Board Diagnosis Logic ......................................

59

Possible Cause .......................................................

59

DTC Confirmation Procedure  .................................

59

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

60

P0734 4GR INCORRECT RATIO  ......................

61

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

61

On Board Diagnosis Logic ......................................

61

Possible Cause .......................................................

61

DTC Confirmation Procedure  .................................

61

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

62

P0735 5GR INCORRECT RATIO  ......................

63

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

63

On Board Diagnosis Logic ......................................

63

Possible Cause .......................................................

63

DTC Confirmation Procedure  .................................

63

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

64

P0740 TORQUE CONVERTER  .........................

65

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

65

CONSULT-III Reference Value in Data Monitor 
Mode ......................................................................
.

65

On Board Diagnosis Logic ......................................

65

Possible Cause .......................................................

65

DTC Confirmation Procedure  .................................

65

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

65

P0744 TORQUE CONVERTER  .........................

67

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

67

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

67

On Board Diagnosis Logic  ......................................

67

Possible Cause  .......................................................

67

DTC Confirmation Procedure ..................................

67

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

68

P0745 PRESSURE CONTROL SOLENOID A ...

69

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

69

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

69

On Board Diagnosis Logic  ......................................

69

Possible Cause  .......................................................

69

DTC Confirmation Procedure ..................................

69

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

69

P1705 TP SENSOR  ...........................................

71

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

71

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

71

On Board Diagnosis Logic  ......................................

71

Possible Cause  .......................................................

71

DTC Confirmation Procedure ..................................

71

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

71

P1710 TRANSMISSION FLUID TEMPERA-
TURE SENSOR  .................................................

73

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

73

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

73

On Board Diagnosis Logic  ......................................

73

Possible Cause  .......................................................

73

DTC Confirmation Procedure ..................................

73

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

73

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

74

P1721 VEHICLE SPEED SIGNAL  ....................

76

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

76

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

76

On Board Diagnosis Logic  ......................................

76

Possible Cause  .......................................................

76

DTC Confirmation Procedure ..................................

76

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

76

P1730 INTERLOCK ...........................................

78

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

78

On Board Diagnosis Logic  ......................................

78

Possible Cause  .......................................................

78

DTC Confirmation Procedure ..................................

78

Judgment of Interlock ..............................................

78

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

78

P1731 1ST ENGINE BRAKING .........................

80

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

80

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

80

On Board Diagnosis Logic  ......................................

80

Possible Cause  .......................................................

80

DTC Confirmation Procedure ..................................

80

TM-3

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

80

P1752 INPUT CLUTCH SOLENOID  ..................

82

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

82

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

82

On Board Diagnosis Logic  ......................................

82

Possible Cause  .......................................................

82

DTC Confirmation Procedure ..................................

82

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

82

P1757 FRONT BRAKE SOLENOID ...................

84

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

84

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

84

On Board Diagnosis Logic  ......................................

84

Possible Cause  .......................................................

84

DTC Confirmation Procedure ..................................

84

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

84

P1762 DIRECT CLUTCH SOLENOID ................

86

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

86

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

86

On Board Diagnosis Logic  ......................................

86

Possible Cause  .......................................................

86

DTC Confirmation Procedure ..................................

86

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

86

P1767 HIGH AND LOW REVERSE CLUTCH 
SOLENOID .........................................................

88

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

88

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

88

On Board Diagnosis Logic  ......................................

88

Possible Cause  .......................................................

88

DTC Confirmation Procedure ..................................

88

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

88

P1772 LOW COAST BRAKE SOLENOID  .........

90

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

90

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

90

On Board Diagnosis Logic  ......................................

90

Possible Cause  .......................................................

90

DTC Confirmation Procedure ..................................

90

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

90

P1774 LOW COAST BRAKE SOLENOID  .........

92

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

92

CONSULT-III Reference Value in Data Monitor 
Mode .......................................................................

92

On Board Diagnosis Logic  ......................................

92

Possible Cause  .......................................................

92

DTC Confirmation Procedure ..................................

92

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

93

MAIN POWER SUPPLY AND GROUND CIR-
CUIT ....................................................................

94

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

94

CLOSED THROTTLE POSITION AND WIDE 
OPEN THROTTLE POSITION CIRCUIT ...........

96

CONSULT-III Reference Value in Data Monitor 
Mode ........................................................................

96

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

96

BRAKE SIGNAL CIRCUIT ................................

97

CONSULT-III Reference Value in Data Monitor 
Mode ........................................................................

97

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

97

TOW MODE SWITCH  .......................................

98

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

98

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

98

A/T SHIFT LOCK SYSTEM ...............................

99

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

99

Terminals And Reference Values ............................

99

Wiring Diagram - A/T SHIFT LOCK SYSTEM - .....

100

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

103

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

106

TCM .................................................................

106

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

106

Wiring Diagram — A/T CONTROL SYSTEM — ....

108

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

117

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

119

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

119

DTC Alphabetical Index .........................................

120

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

121

SYSTEM SYMPTOM .......................................

121

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

121

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

143

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

143

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

143

Precaution for On Board Diagnosis (OBD) System 
of A/T and Engine ..................................................

143

Precaution .............................................................

143

Service Notice or Precaution  .................................

144

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

146

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

146

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

146

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

147

ON-VEHICLE MAINTENANCE ..................

148

A/T FLUID  .......................................................

148

Checking the A/T Fluid (ATF)  ................................

148

Changing the A/T Fluid (ATF) ................................

150

A/T FLUID COOLER  .......................................

152

A/T Fluid Cooler Cleaning  .....................................

152

Inspection ..............................................................

154

TM-4

STALL TEST ....................................................

155

Inspection and Judgment  ......................................

155

LINE PRESSURE TEST  ..................................

157

Inspection and Judgment  ......................................

157

ROAD TEST .....................................................

159

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

159

Check Before Engine Is Started ............................

159

Check At Idle  .........................................................

159

Cruise Test - Part 1  ...............................................

160

Cruise Test - Part 2  ...............................................

162

Cruise Test - Part 3  ...............................................

162

Vehicle Speed When Shifting Gears  .....................

163

Vehicle Speed When Performing and Releasing 
Complete Lock-up  .................................................

163

A/T POSITION  .................................................

164

Adjustment of A/T Position  ....................................

164

Checking of A/T Position  .......................................

164

ON-VEHICLE REPAIR  ...............................

165

SHIFT CONTROL SYSTEM  ............................

165

A/T Shift Selector Removal and Installation  ..........

165

AIR BREATHER HOSE  ...................................

166

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

166

OIL PAN ...........................................................

170

Oil Pan ...................................................................

170

CONTROL VALVE WITH TCM ........................

172

Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 and Plug ..........................................

172

REAR OIL SEAL ..............................................

184

Rear Oil Seal  .........................................................

184

FLUID COOLER SYSTEM ...............................

185

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

185

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

185

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

186

TRANSMISSION ASSEMBLY .........................

186

Removal and Installation (2WD) ...........................

186

Removal and Installation (4WD) ...........................

188

DISASSEMBLY AND ASSEMBLY  ...........

192

OVERHAUL ......................................................

192

Component ...........................................................

192

Oil Channel  ...........................................................

199

Location of Adjusting Shims, Needle Bearings, 
Thrust Washers and Snap Rings  ..........................

201

DISASSEMBLY  ................................................

204

Disassembly ..........................................................

204

REPAIR FOR COMPONENT PARTS  ..............

223

Oil Pump  ...............................................................

223

Front Sun Gear, 3rd One-Way Clutch ...................

225

Front Carrier, Input Clutch, Rear Internal Gear .....

227

Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub  ..................................................

232

High and Low Reverse Clutch  ..............................

237

Direct Clutch  .........................................................

239

ASSEMBLY ......................................................

242

Assembly (1)  .........................................................

242

Adjustment ............................................................

255

Assembly (2)  .........................................................

257

SERVICE DATA AND SPECIFICATIONS 
(SDS) .........................................................

265

SERVICE DATA AND SPECIFICATIONS 
(SDS) ................................................................

265

General Specification ............................................

265

Vehicle Speed at Which Gear Shifting Occurs  .....

265

Vehicle Speed at Which Lock-up Occurs/Releas-
es ..........................................................................

266

Stall Speed ............................................................

266

Line Pressure ........................................................

266

Input Speed Sensor  ..............................................

266

Output Speed Sensor  ...........................................

266

Reverse Brake  ......................................................

266

Total End Play .......................................................

267

Torque Converter ..................................................

267

DIAGNOSIS AND REPAIR WORKFLOW

TM-5

< BASIC INSPECTION >

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BASIC INSPECTION

DIAGNOSIS AND REPAIR WORKFLOW

Work Flow

INFOID:0000000005148505

INTRODUCTION

The TCM receives a signal from the output speed sensor, accelera-

tor pedal position sensor or transmission range switch. Then pro-

vides shift control or lock-up control via A/T solenoid valves.

The TCM also communicates with the ECM by means of a signal

sent from sensing elements used with the OBD-related parts of the

A/T system for malfunction-diagnostic purposes. The TCM is capa-

ble of diagnosing malfunctioning parts while the ECM can store mal-

functions in its memory.

Input and output signals must always be correct and stable in the

operation of the A/T system. The A/T system must be in good oper-

ating condition and be free of valve seizure, solenoid valve malfunc-

tion, etc.

It is much more difficult to diagnose an error that occurs intermit-

tently rather than continuously. Most intermittent errors are caused

by poor electric connections or improper wiring. In this case, careful

checking of suspected circuits may help prevent the replacement of

good parts.

A visual check only may not find the cause of the errors. A road test

with CONSULT-III (or GST) or a circuit tester connected should be

performed. Follow the “DETAILED FLOW”.

Before undertaking actual checks, take a few minutes to talk with a

customer who approaches with a driveability complaint. The cus-

tomer can supply good information about such errors, especially

intermittent ones. Find out what symptoms are present and under

what conditions they occur. A “Diagnostic work sheet” as shown on

the example (Refer to 

TM-6

) should be used.

Start your diagnosis by looking for “conventional” errors first. This will

help troubleshoot driveability errors on an electronically controlled

engine vehicle.

Also check related Service bulletins.

DETAILED FLOW

1.

COLLECT THE INFORMATION FROM THE CUSTOMER

Get the detailed information from the customer about the symptom (the condition and the environment when

the incident/malfunction occurred) using diagnosis worksheet. Refer to 

TM-6, "Diagnostic Work Sheet"

.

>> GO TO 2.

2.

CHECK SYMPTOM 1

Check the following items based on the information obtained from the customer.

• Fail-safe. Refer to 

TM-117, "Fail-Safe"

.

• A/T fluid inspection. Refer to 

TM-148, "Checking the A/T Fluid (ATF)"

.

• Stall test. Refer to 

TM-155, "Inspection and Judgment"

.

• Line pressure test. Refer to 

TM-157, "Inspection and Judgment"

.

SAT631IB

SAT632I

SEF234G

 

 

 

 

 

 

 

Content   ..  923  924  925  926   ..