Infiniti F50. Instruction - page 40

TROUBLE DIAGNOSIS

AT-45

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WORK FLOW

A good understanding of the malfunction conditions can make troubleshooting faster and more accurate.
In general, each customer feels differently about a malfunction. It is important to fully understand the symp-
toms or conditions for a customer complaint.
Make good use of the two sheets provided, “Information From Customer” (Refer to

AT-46

) and “Diagnostic

Worksheet” (Refer to

AT-46

), to perform the best troubleshooting possible.

Work Flow Chart

*1.

AT-46

*2.

AT-46

*3.

AT-42

*4.

AT-51

*5.

AT-51

,

AT-52

*6.

AT-54

*7.

AT-86

*8.

AT-38

*9.

AT-97

*10.

AT-99

*11.

AT-235

*12.

AT-237

*13.

AT-279

*14.

AT-60

*15.

AT-39

*16.

AT-99

*17.

AT-231

*18.

EC-52

SCIA0501E

AT-46

TROUBLE DIAGNOSIS

DIAGNOSTIC WORKSHEET
Information From Customer

KEY POINTS

WHAT..... Vehicle & A/T model

WHEN..... Date, Frequencies

WHERE..... Road conditions

HOW..... Operating conditions, Symptoms

Diagnostic Worksheet Chart

Customer name

MR/MS

Model & Year

VIN

Trans. Model

Engine

Mileage

Incident Date

Manuf. Date

In Service Date

Frequency

Continuous

Intermittent (

times a day)

Symptoms

Vehicle does not move.

(

Any position

Particular position)

No up-shift

(

1st

2nd

2nd

3rd

3rd

4th

4th

5th)

No down-shift

(

5th

4th

4th

3rd

3rd

2nd

2nd

1st)

Lock-up malfunction

Shift point too high or too low.

Shift shock or slip

(

N

D

Lock-up

Any drive position)

Noise or vibration

No kick down

No pattern select

Others

(

)

A/T CHECK indicator lamp

Blinks for about 8 seconds.

Continuously lit

Not lit

Malfunction indicator lamp (MIL)

Continuously lit

Not lit

1

Read the item on “cautions concerning fail-safe and understand the customer's complaint.

AT-42

2

A/T fluid inspection

AT-51

Leak (Repair leak location.)

State

Amount

3

Stall test and line pressure test

AT-51

,

AT-

52

Stall test

Torque converter one-way clutch

Front brake

High and low reverse clutch

Low coast brake

Forward brake

Reverse brake

Forward one-way clutch

1st one-way clutch

3rd one-way clutch

Engine

Line pressure low

Except for input clutch and direct

clutch, clutches and brakes OK

Line pressure inspection - Suspected part:

TROUBLE DIAGNOSIS

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4

Execute all road tests and enter checks in required inspection items.

AT-54

4-1.

Check before engine is started

AT-55

The A/T CHECK Indicator Lamp does come on.

AT-238

.

Execute self-diagnostics Enter checks for detected items.

Vehicle speed sensor·A/T.

AT-110

.

Vehicle speed sensor·MTR.

AT-157

.

Direct clutch solenoid valve.

AT-188

.

TCC solenoid valve.

AT-117

.

Line pressure solenoid valve.

AT-127

.

Input clutch solenoid valve.

AT-170

.

Front brake solenoid valve.

AT-179

.

Low coast brake solenoid valve.

AT-206

.

High and low reverse clutch solenoid valve.

AT-197

.

PNP switch.

AT-105

.

A/T fluid temperature sensors 1, 2.

AT-146

.

Turbine revolution sensors 1, 2.

AT-152

.

A/T interlock.

AT-159

.

A/T 1st engine braking.

AT-166

.

Start signal.

AT-102

.

Accelerator pedal position signal.

AT-144

.

Engine speed signal.

AT-115

.

CAN communication.

AT-99

.

TCM power supply.

AT-132

.

Battery

Other

4-2.

Idle inspection

AT-55

Engine Cannot Be Started in “P” and “N” Position.

AT-239

.

In “ P” Position, Vehicle Moves When Pushed.

AT-240

.

In “N” Position Vehicle Moves.

AT-241

.

Large Shock “N” to “D” Position.

AT-242

.

Vehicle Does Not Creep Backward In “R” Position.

AT-245

.

Vehicle does Not Creep Forward In “D” Position.

AT-247

.

4-3.

Driving tests

AT-56

Part 1

Vehicle Cannot Be Started From D1.

AT-251

.

A/T Does Not Shift: D1

D2.

AT-253

.

A/T Does Not Shift: D2

D3.

AT-255

.

A/T Does Not Shift: D3

D4.

AT-258

.

A/T Does Not Shift: D4

D5.

AT-260

.

A/T Does Not Perform Lock-up.

AT-262

A/T Does Not Hold Lock-up Condition.

AT-265

.

Lock-up Is Not Released.

AT-267

.

Engine Speed Does Not Return To Idle.

AT-268

.

AT-48

TROUBLE DIAGNOSIS

4

4-3

Part 2

AT-58

Vehicle Cannot Be Started From D1.

AT-251

.

A/T Does Not Shift: D1

D2.

AT-253

.

A/T Does Not Shift: D2

D3.

AT-255

.

A/T Does Not Shift: D3

D4.

AT-258

.

Part 3

AT-59

Cannot Be Changed To Manual Mode.

AT-270

.

A/T Does Not Shift: 5th gear

4th gear.

AT-271

.

A/T Does Not Shift: 4th gear

3rd gear.

AT-273

.

A/T Does Not Shift: 3rd gear

2nd gear.

AT-275

.

A/T Does Not Shift: 2nd gear

1st gear.

AT-277

.

Vehicle Does Not Decelerate By Engine Brake.

AT-279

.

Execute self-diagnostics Enter checks for detected items.

Vehicle speed sensor·A/T.

AT-110

.

Vehicle speed sensor·MTR.

AT-157

.

Direct clutch solenoid valve.

AT-188

.

TCC solenoid valve.

AT-117

.

Line pressure solenoid valve.

AT-127

.

Input clutch solenoid valve.

AT-170

.

Front brake solenoid valve.

AT-179

.

Low coast brake solenoid valve.

AT-206

.

High and low reverse clutch solenoid valve.

AT-197

PNP switch.

AT-105

.

A/T fluid temperature sensors 1, 2.

AT-146

.

Turbine revolution sensors 1, 2.

AT-152

.

A/T interlock.

AT-159

.

A/T 1st engine braking.

AT-166

.

Start signal.

AT-102

.

Accelerator pedal position signal.

AT-144

.

Engine sped signal.

AT-115

.

CAN communication.

AT-99

.

TCM power supply.

AT-132

.

Battery

Other

5

Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunction

parts.

6

Execute all road tests and enter the checks again for the required items.

AT-54

7

For any remaining NG items, execute the “diagnostics procedure” and repair or replace the malfunction parts.

See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection proce-
dures.)

AT-60

8

Erase the results of the self-diagnostics from the TCM.

AT-86

,

AT-

97

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