Infiniti I30 (A33). Manual — part 21
2
CHECK ENGINE BRAKE
Does vehicle decelerate by engine brake?
SAT999I
Yes or No
Yes
©
GO TO 3.
No
©
Go to “15. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
3
)”, AT-253.
Continue ROAD TEST.
3
CHECK SHIFT DOWN (D
3
TO D
2
)
1. Move selector lever from D to 2 position while driving in D
3
(O/D OFF).
2. Does A/T shift from D
3
(O/D OFF) to 2
2
?
Read gear position.
SAT791GA
Yes or No
Yes
©
GO TO 4.
No
©
Go to “18. A/T Does Not Shift: D
3
,
D
2
, When Selector Lever D
,
2 Position”, AT-258.
Continue ROAD TEST.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Road Test (Cont’d)
AT-81
4
CHECK ENGINE BRAKE
Does vehicle decelerate by engine brake?
SAT791GA
Yes or No
Yes
©
GO TO 5.
No
©
Go to “15. Engine Speed Does Not Return To Idle (Light Braking D
4
,
D
3
)”, AT-253.
Continue ROAD TEST.
5
CHECK SHIFT DOWN (2
2
TO 1
1
)
1. Move selector lever from 2 to 1 position while driving in 2
2
.
2. Does A/T shift from 2
2
to 1
1
position?
Read gear position.
SAT778B
Yes or No
Yes
©
GO TO 6.
No
©
Go to “19. A/T Does Not Shift: 2
2
,
1
1
, When Selector Lever 2
,
1 Position”, AT-259.
Continue ROAD TEST.
TROUBLE DIAGNOSIS — BASIC INSPECTION
Road Test (Cont’d)
AT-82
6
CHECK ENGINE BRAKE
Does vehicle decelerate by engine brake?
SAT778B
Yes or No
Yes
©
1. Stop vehicle.
2. Perform self-diagnosis. Refer to TCM Self-diagnostic Procedure (No Tools), AT-50.
No
©
Go to “20. Vehicle Does Not Decelerate By Engine Brake”, AT-260. Continue ROAD
TEST.
GI
MA
EM
LC
EC
FE
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS — BASIC INSPECTION
Road Test (Cont’d)
AT-83
Symptom Chart
NHAT0030
Numbers are arranged in order of inspection.
Perform inspections starting with number one and work up.
Items
Symptom
Condition
Diagnostic Item
Reference Page
No Lock-up
Engagement/TCC
Inoperative
Torque converter
is not locked up.
ON vehicle
1. Throttle position sensor (Adjustment)
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
3. Park/neutral position (PNP) switch
adjustment
4. Engine speed signal
5. A/T fluid temperature sensor
6. Line pressure test
7. Torque converter clutch solenoid valve
8. Control valve assembly
OFF vehicle
9. Torque converter
Torque converter
clutch piston slip.
ON vehicle
1. Fluid level
2. Throttle position sensor (Adjustment)
3. Line pressure test
4. Torque converter clutch solenoid valve
5. Line pressure solenoid valve
6. Control valve assembly
OFF vehicle
7. Torque converter
Lock-up point is
extremely high or
low.
AT-248
ON vehicle
1. Throttle position sensor (Adjustment)
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTR
3. Torque converter clutch solenoid valve
4. Control valve assembly
Shift Shock
Sharp shock in
shifting from N to
D position.
ON vehicle
1. Engine idling rpm
2. Throttle position sensor (Adjustment)
3. Line pressure test
4. A/T fluid temperature sensor
5. Engine speed signal
6. Line pressure solenoid valve
7. Control valve assembly
8. Accumulator N-D
OFF vehicle
9. Forward clutch
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Symptom Chart
AT-84
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