2004 INFINITI FX35 clutch

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

AT-184
DTC P1846 ATF PRESSURE SWITCH 6
Revision: 2004 November 2004 FX35/FX45
DTC P1846 ATF PRESSURE SWITCH 6PFP:25240
DescriptionACS007G2
Fail-safe function to detect high and low reverse clutch solenoid valve condition.
CONSULT-II Reference ValueACS007G3
On Board Diagnosis LogicACS007G4

This is not an OBD-II self-diagnostic item.

Diagnostic trouble code “ATF PRES SW 6/CIRC” with CONSULT-II is detected when TCM detects that
actual gear ratio is normal, and relation between gear position and condition of ATF pressure switch 6 is
irregular during depressing accelerator pedal. (Other than during shift change)
Possible CauseACS007G5

ATF pressure switch 6

Harness or connectors
(Switch circuit is open or shorted.)
DTC Confirmation ProcedureACS007G6
CAUTION:
Always drive vehicle at a safe speed.
NOTE:
If “DTC Confirmation Procedure” has been previously performed, always turn ignition switch “OFF”
and wait at least 10 seconds before performing the next test.
After the repair, perform the following procedure to confirm the malfunction is eliminated.
WITH CONSULT-II
1. Start engine.
2. Accelerate vehicle to maintain the following conditions.
ACCELE POSI: 1.5/8 - 2.0/8
Selector lever: “D” position
Gear position: 2nd
3rd Gear (HLR/C ON/OFF)
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
3. Perform step “2” again.
4. Turn ignition switch “OFF”, then perform step “1” to “3” again.
5. Check “SELF-DIAG RESULTS” mode for “A/T” with CONSULT-
II.
If DTC (P1846) is detected, go to AT- 1 8 5 , "
Diagnostic Procedure" .
If DTC (P1767) is detected, go to AT- 1 6 5 , "
Diagnostic Procedure" .
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
.OFF
SAT014K

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-198
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
Vehicle Does Not Creep Backward In “R” PositionACS007GI
SYMPTOM:
The vehicle does not creep in the “R” position. Or an extreme lack of acceleration is observed.
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 accelerator pedal position sensor, ATF pressure switch 6, high and low
reverse clutch solenoid valve, CAN communication line, PNP switch?
YES >> Check the malfunctioning system. Refer to 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 POSITION SENSOR" , AT- 1 8 4 ,
"DTC P1846 ATF PRESSURE SWITCH 6" , AT- 1 6 4 , "DTC P1767 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE" , AT- 1 0 5 , "DTC U1000 CAN COMMUNICATION LINE" , 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.
4. CHECK STALL TEST
Check stall revolution with selector lever in “M” and “R” positions.
Refer to AT- 5 1 , "
STALL TEST" .
OK or NG
OK >> GO TO 6.
OK in “M” position, NG in “R” position>>GO TO 5
NG in both “M” and “R” positions>>GO TO 8.
SAT638A
SAT493G

AT-206
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
12. 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.23).
OK or NG
OK >> GO TO 10.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D1 → D2ACS007GL
SYMPTOM:
The vehicle does not shift-up from the D1 to D2 gear at the specified speed.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" , AT- 2 0 3 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 5, direct clutch solenoid valve, accelerator pedal
position sensor, vehicle speed sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 8 2 , "DTC P1845 ATF PRESSURE SWITCH 5" ,
AT- 1 6 0 , "
DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , 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 POSITION SENSOR" ,
AT- 11 6 , "
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" , AT- 1 4 5 , "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 2 , "
Checking A/T Fluid" .
OK or NG
OK >> GO TO 4.
NG >> Refill ATF.
SAT638A

AT-208
TROUBLE DIAGNOSIS FOR SYMPTOMS
Revision: 2004 November 2004 FX35/FX45
8. 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.10).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
9. CHECK SYMPTOM
Check again. Refer to AT- 5 7 , "
Cruise Test - Part 1" , AT- 6 0 , "Cruise Test - Part 2" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 10.
10. 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.
11 . 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.10).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D2 → D3ACS007GM
SYMPTOM:
The vehicle does not shift-up from D2 to D3 gear at the specified speed.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" , AT- 2 0 3 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 6, high and low reverse clutch solenoid valve,
accelerator pedal position sensor, vehicle speed sensor A/T (revolution sensor) and vehicle speed sensor
MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 8 4 , "DTC P1846 ATF PRESSURE SWITCH 6" ,
AT- 1 6 4 , "
DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE" , 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

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
A/T Does Not Shift: D3 → D4ACS007GN
SYMPTOM:

The vehicle does not shift-up from the D3 to D4 gear at the specified speed.

The vehicle does not shift-up from the D3 to D4 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" , AT- 2 0 3 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 3, front brake solenoid
valve, input clutch solenoid valve, accelerator pedal position sensor, vehicle speed sensor A/T (revolution sen-
sor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 7 8 , "DTC P1841 ATF PRESSURE SWITCH 1" ,
AT- 1 8 0 , "
DTC P1843 ATF PRESSURE SWITCH 3" , AT- 1 5 2 , "DTC P1752 INPUT CLUTCH
SOLENOID VALVE" , AT- 1 5 6 , "DTC P1757 FRONT BRAKE SOLENOID VALVE" , 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 POSITION SENSOR" , AT- 11 6 , "DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR)" , AT- 1 4 5 , "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 2 , "
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- 5 2 , "
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.
SAT638A
SAT494G

TROUBLE DIAGNOSIS FOR SYMPTOMS
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Revision: 2004 November 2004 FX35/FX45
10. 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.
11 . 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.12).
OK or NG
OK >> GO TO 9.
NG >> Repair or replace damaged parts.
A/T Does Not Shift: D4 → D5ACS007GO
SYMPTOM:

The vehicle does not shift-up from the D4 to D5 gear at the specified speed.

The vehicle does not shift-up from the D4 to D5 gear unless A/T is warmed up.
DIAGNOSTIC PROCEDURE
1. CONFIRM THE SYMPTOM
Check if vehicle creeps forward in “D” position” and vehicle can be started from D
1.
OK or NG
OK >> GO TO 2.
NG >> Refer to AT- 2 0 1 , "
Vehicle Does Not Creep Forward In “D” Position" , AT- 2 0 3 , "Vehicle Cannot Be
Started From D1" .
2. CHECK SELF-DIAGNOSTIC RESULTS
Perform self-diagnosis. Refer to AT- 9 4 , "
SELF-DIAGNOSTIC RESULT MODE" .
Do the self-diagnostic results indicate ATF pressure switch 1, ATF pressure switch 5, front brake solenoid
valve, direct clutch solenoid valve, accelerator pedal position sensor, turbine revolution sensor, vehicle speed
sensor A/T (revolution sensor) and vehicle speed sensor MTR?
YES >> Check the malfunctioning system. Refer to AT- 1 7 8 , "DTC P1841 ATF PRESSURE SWITCH 1" ,
AT- 1 8 2 , "
DTC P1845 ATF PRESSURE SWITCH 5" , AT- 1 5 6 , "DTC P1757 FRONT BRAKE
SOLENOID VALVE" , AT- 1 6 0 , "DTC P1762 DIRECT CLUTCH SOLENOID VALVE" , EC-555,
"DTC P2122, P2123 APP SENSOR" (for VQ35DE) or EC-1225, "DTC P2122, P2123 APP SEN-
SOR" (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 POSITION SENSOR" , AT- 1 4 3 , "DTC P1716 TURBINE REVOLUTION SENSOR" ,
AT- 11 6 , "
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)" , AT- 1 4 5 , "DTC
P1721 VEHICLE SPEED SENSOR MTR" .
NO >> GO TO 3.