Infiniti QX56 (JA60). Manual — part 926
TM-6
< BASIC INSPECTION >
DIAGNOSIS AND REPAIR WORKFLOW
>> GO TO 3.
3.
CHECK DTC
1. Check DTC.
2. Perform the following procedure if DTC is detected.
• Record DTC.
• Erase DTC. Refer to
TM-30, "OBD-II Diagnostic Trouble Code (DTC)"
.
Is any DTC detected?
YES
>> GO TO 4.
NO
>> GO TO 6.
4.
PERFORM DIAGNOSTIC PROCEDURE
Perform “Diagnosis Procedure” for the displayed DTC.
>> GO TO 5.
5.
PERFORM DTC CONFIRMATION PROCEDURE
Perform “DTC CONFIRMATION PROCEDURE”.
Is DTC detected?
YES
>> GO TO 4.
NO
>> GO TO 6.
6.
CHECK SYMPTOM 2
Try to confirm the symptom described by the customer.
Is any malfunction present?
YES
>> GO TO 7.
NO
>> INSPECTION END
7.
ROAD TEST
Perform “ROAD TEST”. Refer to
.
>> GO TO 8.
8.
CHECK SYMPTOM 3
Try to confirm the symptom described by the customer.
Is any malfunction present?
YES
>> GO TO 2.
NO
>> INSPECTION END
Diagnostic Work Sheet
INFOID:0000000005148506
INFORMATION FROM CUSTOMER
KEY POINTS
• WHAT. . Vehicle and A/T model
• WHEN. . Date, Frequencies
• WHERE. . Road conditions
• HOW. . Operating conditions, Symptoms
Customer name MR/MS
Model and Year
VIN
Trans. Model
Engine
Mileage
Malfunction Date
Manuf. Date
In Service Date
Frequency
Continuous Intermittent ( times a day)
DIAGNOSIS AND REPAIR WORKFLOW
TM-7
< BASIC INSPECTION >
C
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TM
N
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DIAGNOSTIC WORK SHEET
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 N → R Lock-up Any drive position)
Noise or vibration
No kick down
No pattern select
Others
(
)
A/T CHECK indicator lamp
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 com-
plaint.
2
A/T fluid inspection, stall test and line pressure test
A/T fluid inspection
Leak (Repair leak location.)
State
Amount
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 test - Suspected part:
3
Perform self-diagnosis. — Check detected items to repair or replace malfunctioning
part.
4
Perform road test.
5-1
Check before engine is started
5-2
Check at idle
5-3
Cruise test
Part 1
Part 2
Part 3
Check malfunction phenomena to repair or replace malfunctioning part after completing all road test.
Refer to
.
5
Drive vehicle to check that the malfunction phenomenon has been resolved.
6
Erase the results of the self-diagnosis from the TCM and the ECM.
TM-8
< FUNCTION DIAGNOSIS >
A/T CONTROL SYSTEM
FUNCTION DIAGNOSIS
A/T CONTROL SYSTEM
Cross-Sectional View (2WD models)
INFOID:0000000005148507
1.
Front planetary gear
2.
Mid planetary gear
3.
Rear planetary gear
4.
Direct clutch
5.
High and low reverse clutch
6.
Reverse brake
7.
Drum support
8.
Forward brake
9.
Low coast brake
10. Input shaft
11. Torque converter
12. Oil pump
13. Front brake
14. 3rd one-way clutch
15. Input clutch
16. 1st one-way clutch
17. Control valve with TCM
18. Forward one-way clutch
19. Rear extension
20. Output shaft
SCIA5267E
A/T CONTROL SYSTEM
TM-9
< FUNCTION DIAGNOSIS >
C
E
F
G
H
I
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K
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A
B
TM
N
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P
Cross-Sectional View (4WD models)
INFOID:0000000005148508
Shift Mechanism
INFOID:0000000005148509
The automatic transmission uses compact triple planetary gear systems to improve power-transmission effi-
ciency, simplify construction and reduce weight.
It also employs an optimum shift control and super wide gear ratios. They improve starting performance and
acceleration during medium and high-speed operation.
CONSTRUCTION
1.
Front planetary gear
2.
Mid planetary gear
3.
Rear planetary gear
4.
Direct clutch
5.
High and low reverse clutch
6.
Reverse brake
7.
Drum support
8.
Forward brake
9.
Low coast brake
10. Input shaft
11. Torque converter
12. Oil pump
13. Front brake
14. 3rd one-way clutch
15. Input clutch
16. 1st one-way clutch
17. Control valve with TCM
18. Forward one-way clutch
19. Adapter case
20. Output shaft
SCIA5268E
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