control INFINITI FX35 2004 Service Manual

DTC P1841 ATF PRESSURE SWITCH 1
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureACS007FP
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” 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”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate
“TCM-POWER SUPPLY”?
YES >> Check the TCM power circuit. Refer to AT- 1 2 9 , "DTC P1701 TRANSMISSION CONTROL MOD-
ULE (POWER SUPPLY)" .
NO >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

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

Refer to AT- 1 7 8 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 1Front brake engaged. Refer to AT- 2 0
.ON
Front brake disengaged. Refer to AT- 2 0
.OFF
PCIA0067E

DTC P1843 ATF PRESSURE SWITCH 3
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureACS007FV
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” 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 3”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate
“TCM-POWER SUPPLY”?
YES >> Check the TCM power circuit. Refer to AT- 1 2 9 , "DTC P1701 TRANSMISSION CONTROL MOD-
ULE (POWER SUPPLY)" .
NO >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

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

Refer to AT- 1 8 0 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 3Input clutch engaged. Refer to AT- 2 0
.ON
Input clutch disengaged. Refer to AT- 2 0
.OFF
PCIA0067E

DTC P1845 ATF PRESSURE SWITCH 5
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureACS007G1
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3. Drive vehicle in the “D” position (1st
2nd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 5”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate
“TCM-POWER SUPPLY”?
YES >> Check the TCM power circuit. Refer to AT- 1 2 9 , "DTC P1701 TRANSMISSION CONTROL MOD-
ULE (POWER SUPPLY)" .
NO >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

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

Refer to AT- 1 8 2 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 5Direct clutch engaged. Refer to AT- 2 0
.ON
Direct clutch disengaged. Refer to AT- 2 0
.OFF
PCIA0067E

DTC P1846 ATF PRESSURE SWITCH 6
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Revision: 2004 November 2004 FX35/FX45
Diagnostic ProcedureACS007G7
1. CHECK INPUT SIGNALS
With CONSULT-II
1. Start the engine.
2. Select “ECU INPUT SIGNALS” or “MAIN SIGNALS” in “DATA
MONITOR” mode for “A/T” with CONSULT-II.
3. Drive vehicle in the “D” position (2nd
3rd gear), and confirm
the ON/OFF actuation of the “ATF PRES SW 6”.
OK or NG
OK >> GO TO 4.
NG >> GO TO 2.
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate
“TCM-POWER SUPPLY”?
YES >> Check the TCM power circuit. Refer to AT- 1 2 9 , "DTC P1701 TRANSMISSION CONTROL MOD-
ULE (POWER SUPPLY)" .
NO >> GO TO 3.
3. DETECT MALFUNCTIONING ITEM
Check the following items:

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

Refer to AT- 1 8 4 , "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 2.
Item name Condition Display value
ATF PRES SW 6High and low reverse clutch engaged.
Refer to AT- 2 0
.ON
High and low reverse clutch disengaged.
Refer to AT- 2 0
.OFFPCIA0067E

AT-192
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
3. DETECT MALFUNCTIONING ITEM
Check the following items:

Harness for short or open between battery and A/T assembly harness connector terminals 1, 2.

Harness for short or open between ignition switch and A/T assembly harness connector terminal 6

10A fuse (No.37, located in the fuse and fusible link box)

10A fuse (No.83, located in the IPDM E/R)

Ignition switch, Refer to PG-3, "POWER SUPPLY ROUTING CIRCUIT" .
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch OFF.
2. Disconnect A/T assembly harness connector.
3. Check continuity between A/T assembly harness connector terminals 5(B), 10(B) and ground. Refer to
AT- 1 3 0 , "
Wiring Diagram — AT — POWER" .
4. If OK, check the harness for short circuit to ground or the power
source.
OK or NG
OK >> GO TO 5.
NG >> Repair the open or short circuit in the harness or
connector.
5. CHECK A/T CHECK INDICATOR LAMP CIRCUIT
1. Turn ignition switch OFF.
2. Check the combination meter. Refer to DI-4, "
COMBINATION METERS" .
OK or NG
OK >> GO TO 6
NG >> Replace the combination meter. Refer to DI-26, "
Disassembly and Assembly for Combination
Meter" .
6. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate
“TCM-POWER SUPPLY”?
YES >> Check the TCM power circuit. Refer to AT- 1 2 9 , "DTC P1701 TRANSMISSION CONTROL MOD-
ULE (POWER SUPPLY)" .
NO >> GO TO 7.
7. DETECT MALFUNCTIONING ITEM
Check the following items:

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> Replace the control valve with TCM. Refer to AT- 2 4 2 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NG >> Repair or replace damaged parts.Continuity should exist.
SCIA2106E

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
Engine Cannot Be Started In “P” or “N” PositionACS007GE
SYMPTOM:

Engine cannot be started with selector lever in “P” or “N” position.

Engine can be started with selector lever in “D”or “R” position.
DIAGNOSTIC PROCEDURE
1. CHECK PNP SWITCH CIRCUIT
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnosis results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT- 11 2 , "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
NO >> GO TO 2.
2. CHECK CONTROL LINKAGE
Check the control linkage.

Refer to AT- 2 3 4 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .
3. CHECK STARTING SYSTEM
Check starting system. Refer to SC-10, "
STARTING SYSTEM" .
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
In “P” Position, Vehicle Moves When PushedACS007GF
SYMPTOM:
Even though the selector lever is set in the “P” position, the parking mechanism is not actuated,
allowing the vehicle to be moved when it is pushed.
DIAGNOSTIC PROCEDURE
1. CHECK PNP SWITCH CIRCUIT
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnosis results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT- 11 2 , "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
NO >> GO TO 2.
2. CHECK CONTROL LINKAGE
Check the control linkage.

Refer to AT- 2 3 4 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .

AT-194
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
3. CHECK PARKING COMPONENTS
Check parking components. Refer to AT- 2 5 3 , "
Parking Components (2WD Models Only)" (2WD models) or
AT- 2 8 6 , "
Disassembly" (AWD models).
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
4. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> INSPECTION END
NG >> Check the malfunction items. If any items are damaged,
repair or replace damaged parts. Refer to AT- 6 5 , "
Symp-
tom Chart" (Symptom No.65).
In “N” Position, Vehicle MovesACS007GG
SYMPTOM:
Vehicle moves forward or backward when selecting “N” position.
DIAGNOSTIC PROCEDURE
1. CHECK PNP SWITCH CIRCUIT
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "TCM SELF-DIAG-
NOSTIC PROCEDURE (NO TOOLS)" .
Do the self-diagnostic results indicate PNP switch?
YES >> Check the malfunctioning system. Refer to AT- 11 2 , "DTC P0705 PARK/NEUTRAL POSITION
SWITCH" .
NO >> GO TO 2.
2. CHECK CONTROL LINKAGE
Check the control linkage.

Refer to AT- 2 3 4 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 3.
NG >> Adjust control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .
3. CHECK A/T FLUID LEVEL
Check A/T fluid level. Refer to AT- 1 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
SCIA5199E
SAT638A

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
4. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
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 5 , "
Symp-
tom Chart" (Symptom No.67).
5. CHECK SYMPTOM
Check again. Refer to AT- 5 5 , "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 6.
6. CHECK TCM
1. Check TCM input/output signals. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
Large Shock (“N” to “D” Position)ACS007GH
SYMPTOM:
A noticeable shock occurs when the selector lever is shifted from the “N” to “D” position.
DIAGNOSTIC PROCEDURE
1. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate A/T fluid temperature sensor, engine speed signal, accelerator pedal
position sensor, ATF pressure switch 1, front brake solenoid valve, CAN communication line?
YES >> Check the malfunctioning system. Refer to AT- 1 3 9 , "DTC P1710 A/T FLUID TEMPERATURE
SENSOR CIRCUIT" , AT- 1 2 1 , "DTC P0725 ENGINE SPEED SIGNAL" , EC-555, "DTC P2122,
P2123 APP SENSOR" (for VQ35DE) or EC-1225, "DTC P2122, P2123 APP SENSOR" (for
VK45DE), EC-562, "
DTC P2127, P2128 APP SENSOR" (for VQ35DE) or EC-1232, "DTC P2127,
P2128 APP SENSOR" (for VK45DE), EC-576, "DTC P2138 APP SENSOR" (for VQ35DE) or
EC-1246, "
DTC P2138 APP SENSOR" (for VK45DE), AT- 1 3 6 , "DTC P1705 THROTTLE POSI-
TION SENSOR" , AT- 1 7 8 , "DTC P1841 ATF PRESSURE SWITCH 1" , AT- 1 5 6 , "DTC P1757
FRONT BRAKE SOLENOID VALVE" , AT- 1 0 5 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. ENGINE IDLE SPEED
Check the engine idle speed. Refer to EC-37, "
Idle Speed and Ignition Timing Check" (for VQ35DE) or EC-
685, "Idle Speed and Ignition Timing Check" (for VK45DE).
OK or NG
OK >> GO TO 3.
NG >> Repair.
SCIA5199E

AT-196
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
3. CHECK CONTROL LINKAGE
Check the control linkage.

Refer to AT- 2 3 4 , "Checking of A/T Position" .
OK or NG
OK >> GO TO 4.
NG >> Adjust control linkage. Refer to AT- 2 3 4 , "
Adjustment of A/T Position" .
4. CHECK A/T FLUID LEVEL
Check the A/T fluid level. Refer to AT- 1 2 , "
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 2 , "
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 2 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 8 6 , "
DISASSEMBLY" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 3 0 3 , "Oil Pump" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
SAT638A
SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
7. DETECT MALFUNCTIONING ITEM
1. Check control valve with TCM. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sen-
sor 2" .
2. Disassemble A/T. Refer to AT- 2 8 6 , "
DISASSEMBLY" .
3. Check the following items:
–Oil pump assembly. Refer to AT- 3 0 3 , "Oil Pump" .
–Power train system. Refer to AT- 2 8 6 , "DISASSEMBLY" .
–Transmission case. Refer to AT- 2 8 6 , "DISASSEMBLY" .
OK or NG
OK >> GO TO 8.
NG >> Repair or replace damaged parts.
8. CHECK A/T FLUID CONDITION
1. Remove oil pan. Refer to AT- 2 4 2 , "
Control Valve with TCM and A/T Fluid Temperature Sensor 2" .
2. Check A/T fluid condition. Refer to AT- 5 1 , "
Fluid Condition
Check" .
OK or NG
OK >> GO TO 10.
NG >> GO TO 9.
9. DETECT MALFUNCTIONING ITEM

Check the malfunction items. If any items are damaged, repair or replace damaged parts. Refer to AT- 6 5 ,
"Symptom Chart" (Symptom No.1).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
10. CHECK SYMPTOM
Check again. Refer to AT- 5 5 , "
Check at Idle" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 11.
11 . CHECK TCM
1. Check TCM input/output signals. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
2. If NG, recheck A/T assembly harness connector terminals for damage or loose connection with harness
connector.
OK or NG
OK >>INSPECTION END
NG >> Repair or replace damaged parts.
SCIA5199E