Infiniti F50. Instruction - page 40
TROUBLE DIAGNOSIS
AT-45
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AT
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
AT-47
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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