Infiniti G20 (P11). Manual — part 15
DIAGNOSTIC WORKSHEET
=NCAT0023S01
Information from Customer
NCAT0023S0101
KEY POINTS
WHAT . . Vehicle & A/T model
WHEN. . Date, Frequencies
WHERE. . Road conditions
HOW. . Operating conditions, Symptoms
Customer name
MR/MS
Model & Year
VIN
Trans. model
Engine
Mileage
Incident Date
Manuf. Date
In Service Date
Frequency
l
Continuous
l
Intermittent (
times a day)
Symptoms
l
Vehicle does not move.
(
l
Any position
l
Particular position)
l
No up-shift
(
l
1st
,
2nd
l
2nd
,
3rd
l
3rd
,
O/D)
l
No down-shift
(
l
O/D
,
3rd
l
3rd
,
2nd
l
2nd
,
1st)
l
Lockup malfunction
l
Shift point too high or too low.
l
Shift shock or slip
(
l
N
,
D
l
Lockup
l
Any drive position)
l
Noise or vibration
l
No kickdown
l
No pattern select
l
Others
(
)
O/D OFF indicator lamp
Blinks for about 8 seconds.
l
Continuously lit
l
Not lit
Malfunction indicator lamp (MIL)
l
Continuously lit
l
Not lit
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — INTRODUCTION
Introduction (Cont’d)
AT-57
Diagnostic Worksheet
=NCAT0023S0102
1.
l
Read the Fail-safe and listen to customer complaints.
2.
l
CHECK A/T FLUID
l
Leakage (Follow specified procedure)
l
Fluid condition
l
Fluid level
3.
l
Perform STALL TEST and LINE PRESSURE TEST.
l
Stall test — Mark possible damaged components/others.
l
Torque converter one-way clutch
l
Reverse clutch
l
Forward clutch
l
Overrun clutch
l
Forward one-way clutch
l
Low & reverse brake
l
Low one-way clutch
l
Engine
l
Line pressure is low
l
Clutches and brakes except high clutch
and brake band are OK
l
Line Pressure test — Suspected parts:
4.
l
Perform all ROAD TEST and mark required procedures.
4-1.
Check before engine is started.
l
SELF-DIAGNOSTIC PROCEDURE — Mark detected items.
l
PNP switch, AT-107.
l
A/T fluid temperature sensor, AT-113.
l
Vehicle speed sensor·A/T (Revolution sensor), AT-119.
l
Engine speed signal, AT-124.
l
Torque converter clutch solenoid valve, AT-157.
l
Line pressure solenoid valve, AT-174.
l
Shift solenoid valve A, AT-181.
l
Shift solenoid valve B, AT-187.
l
Throttle position sensor, AT-193.
l
Overrun clutch solenoid valve, AT-202.
l
PNP, overdrive control and throttle position switches, AT-263.
l
A/T fluid temperature sensor and TCM power source, AT-208.
l
Vehicle speed sensor·MTR, AT-215.
l
Control unit (RAM), control unit (ROM), AT-219.
l
Control unit (EEP ROM), AT-221.
l
Battery
l
Others
4-2.
Check at idle
l
1. O/D OFF Indicator Lamp Does Not Come On, AT-225.
l
2. Engine Cannot Be Started In “P” And “N” Position, AT-228.
l
3. In “P” Position, Vehicle Moves Forward Or Backward When Pushed, AT-229.
l
4. In “N” Position, Vehicle Moves, AT-230.
l
5. Large Shock. “N”
,
“R” Position, AT-232.
l
6. Vehicle Does Not Creep Backward In “R” Position, AT-234.
l
7. Vehicle Does Not Creep Forward In “D”, “2” Or “1” Position, AT-237.
TROUBLE DIAGNOSIS — INTRODUCTION
Introduction (Cont’d)
AT-58
4.
4-3.
Cruise test
Part-1
l
8. Vehicle Cannot Be Started From D
1
, AT-240.
l
9. A/T Does Not Shift: D
1
,
D
2
Or Does Not Kickdown: D
4
,
D
2
, AT-243.
l
10. A/T Does Not Shift: D
2
,
D
3
, AT-246.
l
11. A/T Does Not Shift: D
3
,
D
4
, AT-249.
l
12. A/T Does Not Perform Lock-up, AT-252.
l
13. A/T Does Not Hold Lock-up Condition, AT-254.
l
14. Lock-up Is Not Released, AT-256.
l
15. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
3
), AT-257.
Part-2
l
16. Vehicle Does Not Start From D
1
, AT-259.
l
9. A/T Does Not Shift: D
1
,
D
2
Or Does Not Kickdown: D
4
,
D
2
, AT-243.
l
10. A/T Does Not Shift: D
2
,
D
3
, AT-246.
l
11. A/T Does Not Shift: D
3
,
D
4
, AT-249.
Part-3
l
17. A/T Does Not Shift: D
4
,
D
3
When Overdrive Control Switch “ON”
,
“OFF”, AT-260
l
15. Engine Speed Does Not Return To Idle (Engine Brake In D
3
), AT-257.
l
18. A/T Does Not Shift: D
3
,
2
2
, When Selector Lever “D”
,
“2” Position, AT-261.
l
15. Engine Speed Does Not Return To Idle (Engine Brake In 2
2
), AT-257.
l
19. A/T Does Not Shift: 2
2
,
1
1
, When Selector Lever “2”
,
“1” Position, AT-262.
l
20. Vehicle Does Not Decelerate By Engine Brake, AT-263.
l
SELF-DIAGNOSTIC PROCEDURE — Mark detected items.
l
PNP switch, AT-107.
l
A/T fluid temperature sensor, AT-113.
l
Vehicle speed sensor·A/T (Revolution sensor), AT-119.
l
Engine speed signal, AT-124.
l
Torque converter clutch solenoid valve, AT-157.
l
Line pressure solenoid valve, AT-174.
l
Shift solenoid valve A, AT-181.
l
Shift solenoid valve B, AT-187.
l
Throttle position sensor, AT-193.
l
Overrun clutch solenoid valve, AT-202.
l
PNP, overdrive control and throttle position switches, AT-263.
l
A/T fluid temperature sensor and TCM power source, AT-208.
l
Vehicle speed sensor·MTR, AT-215.
l
Control unit (RAM), control unit (ROM), AT-219.
l
Control unit (EEP ROM), AT-221.
l
Battery
l
Others
5.
l
For self-diagnosis NG items, inspect each component. Repair or replace the damaged parts.
6.
l
Perform all ROAD TEST and re-mark required procedures.
7.
l
Perform DTC CONFIRMATION PROCEDURE for following MIL indicating items and check out NG items.
Refer to EC-68, “Emission-related Diagnostic Information”.
EC section
l
DTC (P0731) A/T 1st gear function, AT-128.
l
DTC (P0732) A/T 2nd gear function, AT-135.
l
DTC (P0733) A/T 3rd gear function, AT-141.
l
DTC (P0734) A/T 4th gear function, AT-147.
l
DTC (P0744) A/T TCC S/V function (lock-up), AT-163.
8.
l
Perform the Diagnostic Procedures for all remaining items marked NG. Repair or replace the damaged
parts.
Refer to the Symptom Chart when you perform the procedures. (The chart also shows some other possible
symptoms and the component inspection orders.)
9.
l
Erase DTC from TCM and ECM memories.
GI
MA
EM
LC
EC
FE
CL
MT
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — INTRODUCTION
Introduction (Cont’d)
AT-59
Work Flow
NCAT0024
HOW TO PERFORM TROUBLE DIAGNOSES FOR QUICK AND ACCURATE REPAIR
NCAT0024S01
A good understanding of the malfunction conditions can make troubleshooting faster and more accurate. In
general, each customer feels differently about a problem. It is important to fully understand the symptoms or
conditions for a customer complaint.
Make good use of the two sheets provided, “INFORMATION FROM CUSTOMER” (AT-57) and “DIAGNOS-
TIC WORKSHEET” (AT-58), to perform the best troubleshooting possible.
TROUBLE DIAGNOSIS — INTRODUCTION
Work Flow
AT-60
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