2005 INFINITI QX4 brake fluid

TROUBLE DIAGNOSIS
AT-79
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Revision: October 20052005 QX56
56
OthersMaximum speed low.ON vehicle1. Fluid level and stateAT- 5 0
2. Line pressure testAT- 5 1
3. Accelerator pedal position sensorAT- 1 2 3
4. CAN communication lineAT- 9 5
5. Direct clutch solenoid valveAT- 1 4 8
6. Control valve with TCMAT- 2 3 1
OFF vehicle7. Torque converterAT- 2 6 2
8. Oil pump assemblyAT- 2 8 0
9. Input clutchAT- 2 8 4
10. Gear systemAT- 2 5 0
11. High and low reverse clutchAT- 2 9 4
12. Direct clutchAT- 2 9 6
13. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT- 1 6
, AT-1 7 .)AT- 2 6 2
14 Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 6
, AT- 1 7
.)AT- 2 6 2
57Extremely large
creep.ON vehicle1. Engine idle speed EC-77

2. CAN communication lineAT- 9 5
3. ATF pressure switch 5AT- 1 6 4
OFF vehicle 4. Torque converterAT- 2 6 2
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 8 1 , "
In
“P” Position, Vehicle
Moves When Pushed"
.ON vehicle1. PNP switchAT- 1 0 4
2. Control cable adjustmentAT- 2 2 8
OFF vehicle 3. Parking pawl componentsAT- 2 5 0
59Vehicle runs with
transmission in “P”
position.ON vehicle1. PNP switchAT- 1 0 4
2. Fluid level and stateAT- 5 0
3. Control cable adjustmentAT- 2 2 8
4. Control valve with TCMAT- 2 3 1
5. Parking pawl componentsAT- 2 5 0
OFF vehicle 6. Gear systemAT- 2 5 0
No. Items Symptom Condition Diagnostic ItemReference
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AT-80
TROUBLE DIAGNOSIS
Revision: October 20052005 QX56
60
OthersVehicle runs with
transmission in “N”
position.
Refer to AT-182, "In
“N” Position, Vehicle
Moves" .ON vehicle1. PNP switchAT- 1 0 4
2. Fluid level and stateAT-5 0
3. Control cable adjustmentAT- 2 2 8
4. Control valve with TCMAT- 2 3 1
OFF vehicle5. Input clutchAT- 2 8 4
6. Gear systemAT- 2 5 0
7. Direct clutchAT- 2 9 6
8. Reverse brakeAT- 2 6 2
9. Forward one- way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-1 6
, AT-1 7 .)AT- 2 6 2
10. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-1 6
, AT- 1 7
.)AT- 2 6 2
61Engine does not start
in “N” or “P” position.
Refer to AT-180, "Engine Cannot Be
Started In “P” or “N”
Position" .ON vehicle1. Ignition switch and starterPG-4
, SC-
10
2. Control cable adjustmentAT- 2 2 8
3. PNP switchAT- 1 0 4
62Engine starts in posi-
tions other than “N” or
“P”.ON vehicle1. Ignition switch and starterPG-4
, SC-
10
2. Control cable adjustmentAT- 2 2 8
3. PNP switchAT- 1 0 4
63 Engine stall.ON vehicle1. Fluid level and stateAT-5 0
2. Engine speed signalAT - 11 3
3. Turbine revolution sensorAT- 1 3 1
4. Torque converter clutch solenoid valveAT - 11 5
5. CAN communication lineAT-9 5
6. Control valve with TCMAT- 2 3 1
OFF vehicle 7. Torque converterAT- 2 6 2
64Engine stalls when
select lever shifted “N”
→ “D”, “R”.ON vehicle1. Fluid level and stateAT-5 0
2. Engine speed signalAT - 11 3
3. Turbine revolution sensorAT- 1 3 1
4. Torque converter clutch solenoid valveAT - 11 5
5. CAN communication lineAT-9 5
6. Control valve with TCMAT- 2 3 1
OFF vehicle 7. Torque converterAT- 2 6 2
No. Items Symptom Condition Diagnostic ItemReference
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TROUBLE DIAGNOSIS
AT-81
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Revision: October 20052005 QX56
65 OthersEngine speed does
not return to idle.
Refer to AT- 2 0 9 ,
"Engine Speed Does
Not Return to Idle" .ON vehicle1. Fluid level and stateAT- 5 0
2. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 6 4,
AT- 1 4 8
3. ATF pressure switch 1 and front brake solenoid valveAT- 1 6 0,
AT- 1 4 4
4. Accelerator pedal position sensorAT- 1 2 3
5. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 1 0 8,
AT- 1 3 3
6. CAN communication lineAT- 9 5
7. Control valve with TCMAT- 2 3 1
OFF vehicle8. Front brake (brake band)AT- 2 6 29. Direct clutchAT- 2 9 6
No. Items Symptom Condition Diagnostic ItemReference
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DTC P1731 A/T 1ST ENGINE BRAKING
AT-139
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Revision: October 20052005 QX56
Diagnostic ProcedureECS00CHG
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start the engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” for
"A/T" with CONSULT-II"
3. Drive vehicle in the “1” position (1st gear), and confirm the ON/
OFF actuation of “ATF PRES SW 2” and "ON OFF SOL".
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 3 8 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF
SOLLow coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
ATF PRES
SW 2Low coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
PCIA0067E

DTC P1757 FRONT BRAKE SOLENOID VALVE
AT-145
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Revision: October 20052005 QX56
Diagnostic ProcedureECS00CHY
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T”
with CONSULT-II.
3. Start engine.
4. Read out the value of “FR/B SOLENOID” while driving.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 4 4 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
(Approx.)
FR/B SOLE-
NOIDFront brake engaged. Refer to AT - 1 9
. 0.6 - 0.8 A
Front brake disengaged. Refer to AT- 1 9
. 0 - 0.05 ASCIA4793E

DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION
AT-147
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Revision: October 20052005 QX56
Diagnostic ProcedureECS00CI4
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3. Drive vehicle in the “D” position (3rd

4th gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 1” and electrical
current value of “FR/B SOLENOID”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 4 6 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
(Approx.)
FR/B SOLE-
NOIDFront brake engaged. Refer to AT- 1 9
. 0.6 - 0.8 A
Front brake disengaged. Refer to AT- 1 9
. 0 - 0.05 A
ATF PRES
SW 1Front brake engaged. Refer to AT- 1 9
.ON
Front brake disengaged. Refer to AT- 1 9
.OFF
SCIA4796E

DTC P1772 LOW COAST BRAKE SOLENOID VALVE
AT-157
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Revision: October 20052005 QX56
Diagnostic ProcedureECS00CIY
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch “ON”.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3. Start the engine.
4. Read out the value of “ON OFF SOL” while driving.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 5 6 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT - 1 9
.OFF
SCIA4794E

DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION
AT-159
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Revision: October 20052005 QX56
Diagnostic ProcedureECS00CJ4
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start the engine.
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode
for “A/T” with CONSULT-II.
3. Drive vehicle in the “1” or “2” position (“1
1 ” or “22 ” gear) and
confirm the ON/OFF actuation of the “ATF PRES SW 2” and
“ON OFF SOL”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT-168, "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 3.
NG >> Repair or replace damaged parts.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT - 2 3 1 , "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 5 8 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ON OFF SOLLow coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
ATF PRES
SW 2Low coast brake engaged. Refer to AT- 1 9
.ON
Low coast brake disengaged. Refer to AT- 1 9
.OFF
SCIA4794E