Infiniti FX35 / FX45. Manual - part 32

AT-56

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS

When releasing accelerator pedal from D

5

, check lock-up from D

5

 to L/U. Refer to 

AT-58, "Vehicle Speed at

Which Lock-up Occurs/Releases"

.

With CONSULT-III

Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to 

AT-84, "CON-

SULT-III Function (TRANSMISSION)"

.

Does it lock-up?

YES

>> GO TO 7.

NO

>> Enter a check mark at 

AT-190, "A/T Does Not Lock-up"

 on the “Diagnostic Worksheet Chart”, then

continue the road test.

7.

CHECK LOCK-UP HOLD

Check hold lock-up.

With CONSULT-III

Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to 

AT-84, "CON-

SULT-III Function (TRANSMISSION)"

.

Does it maintain lock-up status?

YES

>> GO TO 8.

NO

>> Enter a check mark at 

AT-192, "A/T Does Not Hold Lock-up Condition"

 on the “Diagnostic Work-

sheet Chart”, then continue the road test.

8.

CHECK LOCK-UP RELEASE

Check lock-up cancellation by depressing brake pedal lightly to decelerate.

With CONSULT-III

Select “TCC SOLENOID” with the “DATA MONITOR” mode for “TRANSMISSION”. Refer to 

AT-84, "CON-

SULT-III Function (TRANSMISSION)"

.

Does lock-up cancel?

YES

>> GO TO 9.

NO

>> Enter a check mark at 

AT-194, "Lock-up Is Not Released"

 on the “Diagnostic Worksheet Chart”,

then continue the road test.

9.

CHECK SHIFT-DOWN D

5

 

→

 D

4

Decelerate by pressing lightly on the brake pedal.

With CONSULT-III

Read the gear position and engine speed. Refer to 

AT-84, "CONSULT-III Function (TRANSMISSION)"

.

When the A/T shift-down D

5

 

→

 D

4

, does the engine speed drop smoothly back to idle?

YES

>> 1.

Stop the vehicle.

2.

Go to 

AT-53, "Road Test"

.

NO

>> Enter a check mark at 

AT-194, "Engine Speed Does Not Return to Idle"

 on the “Diagnostic Work-

sheet Chart”, then continue the road test. Go to 

AT-53, "Road Test"

.

CRUISE TEST - PART 2

1.

CHECK STARTING FROM D

1

1.

Move selector lever into “D” position.

2.

Accelerate at half throttle.

With CONSULT-III

Read the gear position. Refer to 

AT-84, "CONSULT-III Function (TRANSMISSION)"

.

Does it start from D

1

?

YES

>> GO TO 2.

NO

>> Enter a check mark at 

AT-180, "Vehicle Cannot Be Started from D

1

"

 on the “Diagnostic Worksheet

Chart”, then continue the road test.

2.

CHECK SHIFT-UP D

1

 

→

 D

2

Press the accelerator pedal down all the way and check whether or not the A/T shifts up (D

1

 

→

 D

2

) at the cor-

rect speed. Refer to 

AT-58, "Vehicle Speed at Which Gear Shifting Occurs"

.

With CONSULT-III

TROUBLE DIAGNOSIS

AT-57

< SERVICE INFORMATION >

D

E

F

G

H

I

J

K

L

M

A

B

AT

N

O

P

Read the gear position, throttle position and vehicle speed. Refer to 

AT-84, "CONSULT-III Function (TRANS-

MISSION)"

.

Does the A/T shift-up D

1

 

→

 D

2

 at the correct speed?

YES

>> GO TO 3.

NO

>> Enter a check mark at 

AT-182, "A/T Does Not Shift: D

1

→

  D

2

"

 on the “Diagnostic Worksheet

Chart”, then continue the road test.

3.

CHECK SHIFT-UP D

2

 

→

 D

3

Press the accelerator pedal down all the way and check whether or not the A/T shifts up (D

2

 

→

 D

3

) at the cor-

rect speed. Refer to 

AT-58, "Vehicle Speed at Which Gear Shifting Occurs"

.

With CONSULT-III

Read the gear position, throttle position and vehicle speed. Refer to 

AT-84, "CONSULT-III Function (TRANS-

MISSION)"

.

Does the A/T shift-up D

2

 

→

 D

3

 at the correct speed?

YES

>> GO TO 4.

NO

>> Enter a check mark at 

AT-184, "A/T Does Not Shift: D

2

→

  D

3

"

 on the “Diagnostic Worksheet

Chart”, then continue the road test.

4.

CHECK SHIFT-UP D

3

 

→

 D

4

 AND ENGINE BRAKE

When the A/T changes speed D

3

 

→

 D

4

, return the accelerator pedal.

With CONSULT-III

Read the gear position. Refer to 

AT-84, "CONSULT-III Function (TRANSMISSION)"

.

Does the A/T shift-up D

3

 

→

 D

4

 and apply the engine brake?

YES

>> 1.

Stop the vehicle.

2.

Go to 

AT-53, "Road Test"

.

NO

>> Enter a check mark at 

AT-186, "A/T Does Not Shift: D

3

→

  D

4

"

 on the “Diagnostic Worksheet

Chart”, then continue the road test. Go to 

AT-53, "Road Test"

.

CRUISE TEST - PART 3

1.

MANUAL MODE FUNCTION

Move to manual mode from “D” position.

Does it switch to manual mode?

YES

>> GO TO 2.

NO

>> Continue road test and add check mark to 

AT-195, "Cannot Be Changed to Manual Mode"

 on the

“Diagnostic Worksheet Chart”.

2.

CHECK SHIFT-DOWN 

During manual mode driving, is downshift from M5 

→

 M4 

→

 M3 

→

 M2 

→

 M1 performed?

With CONSULT-III

Read the gear position. Refer to 

AT-84, "CONSULT-III Function (TRANSMISSION)"

.

Is downshifting correctly performed?

YES

>> GO TO 3.

NO

>> Enter a check mark at “Vehicle Does Not Shift” at the corresponding position (5th 

→

 4th, 4th 

→

3rd, 3rd 

→

 2nd, 2nd 

→

 1st) on the “Diagnostic Worksheet Chart”, then continue the road test.

3.

CHECK ENGINE BRAKE

Check engine brake.

Does engine braking effectively reduce speed in M1 position?

YES - 1>>

 With CONSULT-III

1.

Stop the vehicle.

2.

Perform self-diagnostics.

YES - 2>>

 Without CONSULT-III

1.

Stop the vehicle.

2.

Perform self-diagnostics. Refer to  

AT-91, "Diagnosis Procedure without CONSULT-III"

.

NO

>> Enter a check mark at 

AT-202, "Vehicle Does Not Decelerate by Engine Brake"

 on the “Diagnostic

Worksheet Chart”, then continue trouble diagnosis.

AT-58

< SERVICE INFORMATION >

TROUBLE DIAGNOSIS

Vehicle Speed at Which Gear Shifting Occurs

INFOID:0000000001327159

2WD MODELS

• At half throttle, the accelerator opening is 4/8 of the full opening.

AWD MODELS

• At half throttle, the accelerator opening is 4/8 of the full opening.

• At half throttle, the accelerator opening is 4/8 of the full opening.

Vehicle Speed at Which Lock-up Occurs/Releases

INFOID:0000000001327160

2WD MODELS

• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)

• At half throttle, the accelerator opening is 4/8 of the full opening.

AWD MODELS

Engine model

VQ35DE

Throttle position

Vehicle speed

km/h (MPH)

D

1

→

D

2

D

2

→

D

3

D

3

→

D

4

D

4

→

D

5

D

5

→

D

4

D

4

→

D

3

D

3

→

D

2

D

2

→

D

1

Full throttle 

68 - 72

(42 - 45)

106 - 114

(66 - 71)

164 - 174

(102 - 108)

235 - 245

(146 - 152)

231 - 241

(144 - 150)

144 - 154

(89 - 96)

89 - 97

(55 - 60)

43 - 47

(27 - 29)

Half throttle 

54 - 58

(34 - 36)

84 - 90

(52 - 56)

127 - 135

(79 - 84)

159 - 167

(99 - 104)

104 - 112

(65 - 70)

75 - 83

(47 - 52)

35 - 41

(22 - 25)

11 - 15

(7 - 9)

Engine model

VQ35DE

Throttle position

Vehicle speed

km/h (MPH)

D

1

→

D

2

D

2

→

D

3

D

3

→

D

4

D

4

→

D

5

D

5

→

D

4

D

4

→

D

3

D

3

→

D

2

D

2

→

D

1

Full throttle 

62 - 66

(39 - 41)

96 - 104

(60 - 65)

149 - 159

(93 - 99)

213 - 223

(132 - 139)

209 - 219

(130 - 136)

131 - 141

(81 - 88)

81 - 89

(50 - 55)

39 - 43

(24 - 27)

Half throttle 

49 - 53

(30 - 33)

76 - 82

(47 - 51)

115 - 123

(71 - 76)

144 - 152

(89 - 94)

95 - 103

(59 - 64)

67 - 75

(42 - 47)

32 - 38

(20 - 24)

11 - 15

(7 - 9)

Engine model

VK45DE

Throttle position

Vehicle speed

km/h (MPH)

D

1

→

D

2

D

2

→

D

3

D

3

→

D

4

D

4

→

D

5

D

5

→

D

4

D

4

→

D

3

D

3

→

D

2

D

2

→

D

1

Full throttle 

59 - 63

(37 - 39)

95 - 103

(59 - 64)

147 - 157

(92 - 98)

219 - 229

(137 - 143)

215 - 225

(134 - 141)

130 - 140

(81 - 88)

82 - 90

(51 - 56)

35 - 39

(22 - 24)

Half throttle 

48 - 52

(30 - 33)

78 - 84

(48 - 52)

122 - 130

(76 - 81)

154 - 162

(96 - 101)

122 - 130

(76 - 81)

68 - 76

(42 - 47)

40 - 46

(25 - 29)

9 - 13

(6 - 8)

Engine model

VQ35DE

Throttle position

Vehicle speed

km/h (MPH)

Lock-up ON

Lock-up OFF

Closed throttle

65 - 73 (40 - 45)

62 - 70 (39 - 43)

Half throttle

196 - 204 (122 - 127)

153 - 161 (95 - 100)

Engine model

VQ35DE

Throttle position

Vehicle speed

km/h (MPH)

Lock-up ON

Lock-up OFF

Closed throttle

59 - 67 (37 - 42)

56 - 64 (35 - 40)

Half throttle

178 - 186 (111 - 116)

139 - 147 (86 - 91)

TROUBLE DIAGNOSIS

AT-59

< SERVICE INFORMATION >

D

E

F

G

H

I

J

K

L

M

A

B

AT

N

O

P

• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)

• At half throttle, the accelerator opening is 4/8 of the full opening.

• At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)

• At half throttle, the accelerator opening is 4/8 of the full opening.

Symptom Chart

INFOID:0000000001327161

• The diagnostics item numbers show the sequence for inspection. Check in order from item 1.
• Overhaul and check inside the A/T only if A/T fluid condition is NG. Refer to 

AT-49, "Inspections Before Trou-

ble Diagnosis"

.

Engine model

VK45DE

Throttle position

Vehicle speed

km/h (MPH)

Lock-up ON

Lock-up OFF

Closed throttle

66 - 74 (41 - 46)

53 - 61 (33 - 38)

Half throttle

191 - 199 (119 - 124)

145 - 153 (90 - 95)

No.

Items

Symptom

Condition

Diagnostic Item

Reference 

page

1

Shift 
Shock

Large shock. (“N” 

→

 

“D” position)
Refer to 

AT-173, 

"Large Shock ("N" to 
"D" Position)"

.

ON vehicle

1. Engine idle speed

EC-84

 (for 

VQ35DE) 

or 

EC-661

 

(for 

VK45DE)

2. Engine speed signal

AT-112

3. Accelerator pedal position sensor

AT-130

4. A/T position

AT-207

5. A/T fluid temperature sensor

AT-132

6. Front brake solenoid valve

AT-145

7. CAN communication line

AT-94

8. A/T fluid level and state

AT-49

9. Line pressure test

AT-49

10. Control valve with TCM

AT-215

OFF vehicle

11. Forward brake (Parts behind drum support is impossible 
to perform inspection by disassembly. Refer to 

AT-16, "Cross-

Sectional View (2WD Models)"

, 

AT-17, "Cross-Sectional View 

(VQ35DE Models for AWD)"

 or 

AT-18, "Cross-Sectional View 

(VK45DE Models for AWD)"

)

AT-267

2

Shock is too large 
when changing D

1

 

→

 

D

2

 or M1 

→

 M2.

ON vehicle

1. Accelerator pedal position sensor

AT-130

2. A/T position

AT-207

3. Direct clutch solenoid valve

AT-147

4. CAN communication line

AT-94

5. Engine speed signal

AT-112

6. Turbine revolution sensor

AT-106

7. Vehicle speed sensor A/T and vehicle speed sensor MTR

AT-108

, 

AT-137

8. A/T fluid level and state

AT-49

9. Control valve with TCM

AT-215

OFF vehicle

10. Direct clutch

AT-303