oil level INFINITI QX56 2004 Factory User Guide

TROUBLE DIAGNOSIS
AT-81
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
36
Slips/Will
Not
EngageWith selector lever in
“R” position, accelera-
tion is extremely poor.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 8 4,
AT- 1 6 3
5. CAN communication lineAT- 1 0 3
6. PNP switchAT- 1 0 9
7. Control cable adjustmentAT- 2 3 4
8. Control valve with TCMAT- 2 4 1
OFF vehicle9. Gear systemAT- 2 6 110. Output shaftAT- 2 7 3
11. Reverse brakeAT- 2 7 3
37While starting off by
accelerating in 1st,
engine races or slip-
page occurs.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. Control valve with TCMAT- 2 4 1
OFF vehicle6. Torque converterAT- 2 7 3
7. Oil pump assemblyAT- 2 9 0
8. 3rd one-way clutchAT- 2 9 2
9. 1st one-way clutchAT- 3 0 0
10. Gear systemAT- 2 6 1
11. Reverse brakeAT- 2 7 3
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 8
, AT-1 9 .)AT- 2 7 3
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 8
, AT - 1 9
.)AT- 2 7 3
38While accelerating in
2nd, engine races or
slippage occurs.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 8 1,
AT- 1 5 7
6. Control valve with TCMAT- 2 4 1
OFF vehicle7. Torque converterAT- 2 7 3
8. Oil pump assemblyAT- 2 9 0
9. 3rd one-way clutchAT- 2 9 2
10. Gear systemAT- 2 6 1
11. Direct clutchAT- 3 0 7
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 8
, AT - 1 9
.)AT- 2 7 3
No. Items Symptom Condition Diagnostic ItemReference
page

AT-82
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
39
Slips/Will
Not
EngageWhile accelerating in
3rd, engine races or
slippage occurs.ON vehicle1. Fluid level and stateAT-5 8
2. Line pressure testAT-5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 8 4,
AT- 1 6 3

6. Control valve with TCMAT- 2 4 1
OFF vehicle7. Torque converterAT- 2 7 3
8. Oil pump assemblyAT- 2 9 0
9. 3rd one-way clutchAT- 2 9 2
10. Gear systemAT- 2 6 1
11. High and low reverse clutchAT- 3 0 5
12. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-1 8
, AT- 1 9 .)AT- 2 7 3
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 8
, AT- 1 9
.)AT- 2 7 3
40While accelerating in
4th, engine races or
slippage occurs.ON vehicle1. Fluid level and stateAT-5 8
2. Line pressure testAT-5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. ATF pressure switch 3 and input clutch solenoid valveAT- 1 7 8,
AT- 1 4 5
6. Control valve with TCMAT- 2 4 1
OFF vehicle7. Torque converterAT- 2 7 3
8. Oil pump assemblyAT- 2 9 0
9. Input clutchAT- 2 9 5
10. Gear systemAT- 2 6 1
11. High and low reverse clutchAT- 3 0 5
12. Direct clutchAT- 3 0 7
No. Items Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSIS
AT-83
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
41
Slips/Will
Not
Engage While accelerating in
5th, engine races or
slippage occurs.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 5,
AT- 1 5 1
6. Control valve with TCMAT- 2 4 1
OFF vehicle7. Torque converterAT- 2 7 3
8. Oil pump assemblyAT- 2 9 0
9. Front brake (brake band)AT- 2 7 3
10. Input clutchAT- 2 9 5
11. Gear systemAT- 2 6 1
12. High and low reverse clutchAT- 3 0 5
42 Slips at lock-up.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Engine speed signalAT- 11 5
4. Turbine revolution sensorAT- 1 3 4
5. Torque converter clutch solenoid valveAT- 11 8
6. CAN communication lineAT- 1 0 3
7. Control valve with TCMAT- 2 4 1
OFF vehicle8. Torque converterAT- 2 7 39. Oil pump assemblyAT- 2 9 0
43No creep at all.
Refer toAT- 1 9 8 , "
Vehi-
cle Does Not Creep
Backward In “R” Posi-
tion" , AT-201, "Ve hi-
cle Does Not Creep
Forward In “D” Posi-
tion"
ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 8 1,
AT- 1 5 7
5. PNP switchAT- 1 0 9
6. CAN communication lineAT- 1 0 3
7. Control cable adjustmentAT- 2 3 4
8. Control valve with TCMAT- 2 4 1
OFF vehicle9. Torque converterAT- 2 7 3
10. Oil pump assemblyAT- 2 9 0
11. 1st one-way clutchAT- 3 0 0
12. Gear systemAT- 2 6 1
13. Reverse brakeAT- 2 7 3
14. Direct clutchAT- 3 0 7
15. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 8
, AT-1 9 .)AT- 2 7 3
16. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 8
, AT - 1 9
.)AT- 2 7 3
No. Items Symptom Condition Diagnostic ItemReference
page

AT-84
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
44
Slips/Will
Not
EngageVehicle cannot run in
all positions.ON vehicle1. Fluid level and stateAT-5 8
2. Line pressure testAT-5 9
3. PNP switchAT- 1 0 9
4. Control cable adjustmentAT- 2 3 4
5. Control valve with TCMAT- 2 4 1
OFF vehicle6. Oil pump assemblyAT- 2 9 07. Gear systemAT- 2 6 1
8. Output shaftAT- 2 7 3
45With selector lever in
“D” position, driving is
not possible.ON vehicle1. Fluid level and stateAT-5 8
2. Line pressure testAT-5 9
3. PNP switchAT- 1 0 9
4. Control cable adjustmentAT- 2 3 4
5. Control valve with TCMAT- 2 4 1
OFF vehicle6. Torque converterAT- 2 7 3
7. Oil pump assembly AT- 2 9 0
8. 1st one-way clutchAT- 3 0 0
9. Gear systemAT- 2 6 1
10. Reverse brakeAT- 2 7 3
11. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-1 8
, AT- 1 9 .)AT- 2 7 3
12. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 8
, AT- 1 9
.)AT- 2 7 3
46With selector lever in
“R” position, driving is
not possible.ON vehicle1. Fluid level and stateAT-5 8
2. Line pressure testAT-5 9
3. PNP switchAT- 1 0 9
4. Control cable adjustmentAT- 2 3 4
5. Control valve with TCMAT- 2 4 1
OFF vehicle6. Gear systemAT- 2 6 17. Output shaftAT- 2 7 3
8. Reverse brakeAT- 2 7 3
47 OthersShift point is high in
“D” position.ON vehicle1. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 2
,
AT- 1 3 6
2. Accelerator pedal position sensorAT- 1 2 9
3. CAN communication lineAT- 1 0 3
4. ATF temperature sensorAT- 1 3 1
5. Control valve with TCMAT- 2 4 1
No. Items Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSIS
AT-85
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
48
OthersShift point is low in “D”
position.ON vehicle1. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 2
,
AT- 1 3 6
2. Accelerator pedal position sensorAT- 1 2 9
3. CAN communication lineAT- 1 0 3
4. Control valve with TCMAT- 2 4 1
49Judder occurs during
lock-up.ON vehicle1. Fluid level and stateAT- 5 8
2. Engine speed signalAT- 11 5
3. Turbine revolution sensorAT- 1 3 4
4. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 11 2,
AT- 1 3 6
5. Accelerator pedal position sensorAT- 1 2 9
6. CAN communication lineAT- 1 0 3
7. Torque converter clutch solenoid valveAT- 11 8
8. Control valve with TCMAT- 2 4 1
OFF vehicle 9. Torque converterAT- 2 7 3
50Strange noise in “R”
position.ON vehicle1. Fluid level and stateAT- 5 8
2. Engine speed signalAT- 11 5
3. CAN communication lineAT- 1 0 3
4. Control valve with TCMAT- 2 4 1
OFF vehicle5. Torque converterAT- 2 7 3
6. Oil pump assemblyAT- 2 9 0
7. Gear systemAT- 2 6 1
8. High and low reverse clutchAT- 3 0 5
9. Reverse brakeAT- 2 7 3
51Strange noise in “N”
position.ON vehicle1. Fluid level and stateAT- 5 8
2. Engine speed signalAT- 11 5
3. CAN communication lineAT- 1 0 3
4. Control valve with TCMAT- 2 4 1
OFF vehicle5. Torque converterAT- 2 7 36. Oil pump assemblyAT- 2 9 0
7. Gear systemAT- 2 6 1
52Strange noise in “D”
position.ON vehicle1. Fluid level and stateAT- 5 8
2. Engine speed signalAT- 11 5
3. CAN communication lineAT- 1 0 3
4. Control valve with TCMAT- 2 4 1
OFF vehicle5. Torque converterAT- 2 7 3
6. Oil pump assemblyAT- 2 9 0
7. Gear systemAT- 2 6 1
8. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 8
, AT - 1 9
.)AT- 2 7 3
No. Items Symptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSIS
AT-87
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
56
OthersMaximum speed low.ON vehicle1. Fluid level and stateAT- 5 8
2. Line pressure testAT- 5 9
3. Accelerator pedal position sensorAT- 1 2 9
4. CAN communication lineAT- 1 0 3
5. Direct clutch solenoid valveAT- 1 5 7
6. Control valve with TCMAT- 2 4 1
OFF vehicle7. Torque converterAT- 2 7 3
8. Oil pump assemblyAT- 2 9 0
9. Input clutchAT- 2 9 5
10. Gear systemAT- 2 6 1
11. High and low reverse clutchAT- 3 0 5
12. Direct clutchAT- 3 0 7
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 8
, AT-1 9 .)AT- 2 7 3
14 Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 8
, AT - 1 9
.)AT- 2 7 3
57Extremely large
creep.ON vehicle1. Engine idle speed EC-32

2. CAN communication lineAT- 1 0 3
3. ATF pressure switch 5AT- 1 8 1
OFF vehicle 4. Torque converterAT- 2 7 3
58With selector lever in
“P” position, vehicle
does not enter parking
condition or, with
selector lever in
another position, park-
ing condition is not
cancelled.
Refer to AT- 1 9 3 , "
In
“P” Position, Vehicle
Moves When Pushed"
.ON vehicle1. PNP switchAT- 1 0 9
2. Control cable adjustmentAT- 2 3 4
3. Parking pawl componentsAT- 2 6 1
59Vehicle runs with
transmission in “P”
position.ON vehicle1. PNP switchAT- 1 0 9
2. Fluid level and stateAT- 5 8
3. Control cable adjustmentAT- 2 3 4
4. Control valve with TCMAT- 2 4 1
5. Parking pawl componentsAT- 2 6 1
OFF vehicle 6. Gear systemAT- 2 6 1
No. Items Symptom Condition Diagnostic ItemReference
page

AT-194
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: August 20072004 QX56
In “N” Position, Vehicle MovesUCS002IL
SYMPTOM:
Vehicle moves forward or backward when selecting “N” position.
DIAGNOSTIC PROCEDURE
1. CHECK PNP SWITCH CIRCUIT
Perform self-diagnosis. Refer to AT- 9 3 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT-109, "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
NO >> GO TO 2.
2. CHECK CONTROL CABLE
Check the control cable.

Refer to AT-234, "Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control cable. Refer to AT-234, "
Adjustment of A/
T Position" .
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT-241, "
Control Valve With TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 8 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 5.
NG >> Check the malfunction items. If any items are damaged,
repair or replace damaged parts. Refer to AT - 6 8 , "
Symp-
tom Chart" (Symptom No.60).
LCIA0324E
SAT6 3 8A
SCIA5199E

AT-196
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: August 20072004 QX56
4. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at idle with selector lever in “D” position. Refer
to AT - 5 9 , "
LINE PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high: GO TO 6.
NG - 2 >> Line pressure low: GO TO 7.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 1 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT-273, "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-290, "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 1 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT-273, "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-290, "Oil Pump" .
–Power train system. Refer to AT-273, "Disassembly" .
–Transmission case. Refer to AT-273, "Disassembly" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT6 3 8A
SAT4 9 4G

AT-204
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: August 20072004 QX56
3. CHECK ACCELERATOR PEDAL POSITION (APP) SENSOR
Check accelerator pedal position (APP) sensor. Refer to AT- 1 2 9 , "
DTC P1705 THROTTLE POSITION SEN-
SOR"
OK or NG
OK >> GO TO 4.
NG >> Repair or replace accelerator pedal position (APP) sensor.
4. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT-13, "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 5.
NG >> Refill ATF.
5. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT- 5 9 , "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 8.
NG - 1 >> Line pressure high. GO TO 6.
NG - 2 >> Line pressure low. GO TO 7.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 1 , "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT-273, "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-290, "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT6 3 8A
SAT4 9 4G

TROUBLE DIAGNOSIS FOR SYMPTOMS
AT-211
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
P1705 THROTTLE POSITION SENSOR" , AT- 11 2 , "DTC P0720 VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR)" , AT - 1 3 6 , "DTC P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 3 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
4. CHECK LINE PRESSURE
Check line pressure at the engine stall point. Refer to AT-59, "
LINE
PRESSURE TEST" .
OK or NG
OK >> GO TO 7.
NG - 1 >> Line pressure high. GO TO 5.
NG - 2 >> Line pressure low. GO TO 6.
5. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-241, "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 7 3 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-290, "Oil Pump" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT-241, "
Control Valve With TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 7 3 , "
Disassembly" .
3. Check the following items:
–Oil pump assembly. Refer to AT-290, "Oil Pump" .
–Power train system. Refer to AT- 2 7 3 , "Disassembly" .
–Transmission case. Refer to AT - 2 7 3 , "Disassembly" .
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
SAT6 3 8A
SAT4 9 4G