2005 INFINITI FX35 MAIN POWER SUPPLY AND GROUND CIRCUIT

AT-3
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
CONSULT-II Reference Value .............................
. 154
On Board Diagnosis Logic .................................. . 154
Possible Cause ................................................... . 154
DTC Confirmation Procedure .............................. . 154
Diagnostic Procedure .......................................... . 155
DTC P1759 FRONT BRAKE SOLENOID VALVE
FUNCTION ............................................................. . 156
Description .......................................................... . 156
CONSULT-II Reference Value ............................. . 156
On Board Diagnosis Logic .................................. . 156
Possible Cause ................................................... . 156
DTC Confirmation Procedure .............................. . 156
Diagnostic Procedure .......................................... . 157
DTC P1762 DIRECT CLUTCH SOLENOID VALVE . 158
Description .......................................................... . 158
CONSULT-II Reference Value ............................. . 158
On Board Diagnosis Logic .................................. . 158
Possible Cause ................................................... . 158
DTC Confirmation Procedure .............................. . 158
Diagnostic Procedure .......................................... . 159
DTC P1764 DIRECT CLUTCH SOLENOID VALVE
FUNCTION ............................................................. . 160
Description .......................................................... . 160
CONSULT-II Reference Value ............................. . 160
On Board Diagnosis Logic .................................. . 160
Possible Cause ................................................... . 160
DTC Confirmation Procedure .............................. . 160
Diagnostic Procedure .......................................... . 161
DTC P1767 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE ................................................ . 162
Description .......................................................... . 162
CONSULT-II Reference Value ............................. . 162
On Board Diagnosis Logic .................................. . 162
Possible Cause ................................................... . 162
DTC Confirmation Procedure .............................. . 162
Diagnostic Procedure .......................................... . 163
DTC P1769 HIGH AND LOW REVERSE CLUTCH
SOLENOID VALVE FUNCTION ............................ . 164
Description .......................................................... . 164
CONSULT-II Reference Value ............................. . 164
On Board Diagnosis Logic .................................. . 164
Possible Cause ................................................... . 164
DTC Confirmation Procedure .............................. . 164
Diagnostic Procedure .......................................... . 165
DTC P1772 LOW COAST BRAKE SOLENOID
VALVE .................................................................... . 166
Description .......................................................... . 166
CONSULT-II Reference Value ............................. . 166
On Board Diagnosis Logic .................................. . 166
Possible Cause ................................................... . 166
DTC Confirmation Procedure .............................. . 166
Diagnostic Procedure .......................................... . 167
DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION ................................................ . 168
Description .......................................................... . 168
CONSULT-II Reference Value ............................. . 168
On Board Diagnosis Logic .................................. . 168
Possible Cause ................................................... . 168 DTC Confirmation Procedure ..............................
.168
Diagnostic Procedure .......................................... .169
DTC P1815 MANUAL MODE SWITCH ................. .170
Description ........................................................... .170
CONSULT-II Reference Value in Data Monitor Mode .170
On Board Diagnosis Logic ................................... .170
Possible Cause .................................................... .170
DTC Confirmation Procedure .............................. .170
Wiring Diagram — AT — MMSW ........................ .171
Diagnostic Procedure .......................................... .173
Component Inspection ......................................... .174
DTC P1841 ATF PRESSURE SWITCH 1 .............. .175
Description ........................................................... .175
CONSULT-II Reference Value ............................. .175
On Board Diagnosis Logic ................................... .175
Possible Cause .................................................... .175
DTC Confirmation Procedure .............................. .175
Diagnostic Procedure .......................................... .176
DTC P1843 ATF PRESSURE SWITCH 3 .............. .177
Description ........................................................... .177
CONSULT-II Reference Value ............................. .177
On Board Diagnosis Logic ................................... .177
Possible Cause .................................................... .177
DTC Confirmation Procedure .............................. .177
Diagnostic Procedure .......................................... .178
DTC P1845 ATF PRESSURE SWITCH 5 .............. .179
Description ........................................................... .179
CONSULT-II Reference Value ............................. .179
On Board Diagnosis Logic ................................... .179
Possible Cause .................................................... .179
DTC Confirmation Procedure .............................. .179
Diagnostic Procedure .......................................... .180
DTC P1846 ATF PRESSURE SWITCH 6 .............. .181
Description ........................................................... .181
CONSULT-II Reference Value ............................. .181
On Board Diagnosis Logic ................................... .181
Possible Cause .................................................... .181
DTC Confirmation Procedure .............................. .181
Diagnostic Procedure .......................................... .182
MAIN POWER SUPPLY AND GROUND CIRCUIT .183
Wiring Diagram — AT — MAIN ........................... .183
Diagnostic Procedure .......................................... .184
CLOSED THROTTLE POSITION AND WIDE OPEN
THROTTLE POSITION CIRCUIT ........................... .187
CONSULT-II Reference Value ............................. .187
Diagnostic Procedure .......................................... .187
BRAKE SIGNAL CIRCUIT ..................................... .188
CONSULT-II Reference Value ............................. .188
Diagnostic Procedure .......................................... .188
A/T INDICATOR CIRCUIT ...................................... .189
Description ........................................................... .189
CONSULT-II Reference Value ............................. .189
Diagnostic Procedure .......................................... .189
TROUBLE DIAGNOSIS FOR SYMPTOMS ........... .190
Wiring Diagram — AT — NONDTC ..................... .190
A/T CHECK Indicator Lamp Does Not Come On . 193
Engine Cannot Be Started in “P” or “N” Position . .194
In “P” Position, Vehicle Moves When Pushed ..... .195

AT-116
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002MP
1. CHECK PNP SW CIRCUIT
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “SELECTION FROM MENU” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Check if correct selector lever position (N/P, R or D) is displayed as selector lever is moved into each position.
OK or NG
OK >> GO TO 5.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
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.

A/T assembly harness connector pin terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
Item name Condition Display value
SLCT LVR POSI Selector lever in N and P positions. N/P
Selector lever in R position. R
Selector lever in D position. D
PCIA0034E

DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR) AT-121
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002MU
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Read out the value of “VHCL/S SE·A/T” while driving. Check the value changes according to driving speed.
OK or NG
OK >> GO TO 6.
NG >> GO TO 2.
2. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
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.

The A/T assembly harness connector pin terminals for damage or loose connection with harness connec-
tor.
OK or NG
OK >> GO TO 4.
NG >> Repair or replace damaged parts.
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches
the speedometer reading.
SCIA2148E

AT-124
DTC P0725 ENGINE SPEED SIGNAL
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002MZ
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis. Refer to AT- 9 3 , "
SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diagnostic Pro-
cedure without CONSULT-II" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 1 0 6 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
2. CHECK DTC WITH TCM
With CONSULT-II
1. Start engine.
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. While monitoring engine speed, check for engine speed change corresponding to wide-open throttle position signal.
With GST
Follow the procedure “WITH CONSULT-II”.
OK or NG
OK >> GO TO 3.
NG >> Check the ignition signal circuit.

Refer to EC-648, "IGNITION SIGNAL" (for VQ35DE) or EC-1339, "IGNITION SIGNAL" (for
VK45DE).
3. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT- 1 2 3 , "DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 4.
4. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 5.
NG >> Repair or replace damaged parts.
5. DETECT MALFUNCTIONING ITEM
Check the following.

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 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NG >> Repair or replace damaged parts.
Item name Condition Display value (rpm)
ENGINE SPEED Engine running Closely matches the
tachometer reading.
PCIA0041E

AT-126
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002N5
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Read out the value of “TCC 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- 1 8 3 , "
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.

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 4 3 , "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 2 5 , "DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Item name Condition Display value (Approx.)
TCC SOLENOID Slip lock-up is active 0.2 - 0.4 A
Lock-up is active 0.4 - 0.6 A
SCIA4793E

AT-128
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)
Revision: 2005 July 2005 FX
WITH GST
Follow the procedure “WITH CONSULT-II”.
Diagnostic ProcedureACS002NA
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start the engine.
4. Read out the value of “TCC 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- 1 8 3 , "
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.

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 4 3 , "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 2 7 , "DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Item name Condition Display value (Approx.)
TCC SOLENOID Slip lock-up is active 0.2 - 0.4 A
Lock-up is active 0.4 - 0.6 A
SCIA4793E

AT-130
DTC P0745 LINE PRESSURE SOLENOID VALVE
Revision: 2005 July 2005 FX
Diagnostic ProcedureACS002NF
1. CHECK INPUT SIGNAL
With CONSULT-II
1. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Start engine.
4. Read out the value of “LINE PRES 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- 1 8 3 , "
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.

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 4 3 , "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 2 9 , "DTC Confirmation Procedure" .
OK or NG
OK >> INSPECTION END
NG >> GO TO 2.
Item name Condition Display value (Approx.)
LINE PRES SOL During driving 0.2 - 0.6 A
SCIA4793E

DTC P1705 THROTTLE POSITION SENSOR AT-135
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
5. CHECK TCM POWER SUPPLY AND GROUND CIRCUIT
Check TCM power supply and ground circuit. Refer to AT- 1 8 3 , "
MAIN POWER SUPPLY AND GROUND CIR-
CUIT" .
OK or NG
OK >> GO TO 6.
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
Check the following.

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 4 3 , "Control Valve with TCM and A/T Fluid Tem-
perature Sensor 2" .
NG >> Repair or replace damaged parts.