2005 INFINITI FX35 Service Manual

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Page 201 of 4731

INFINITI FX35 2005 Service Manual AT-118
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: 2005 July 2005 FX
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)PFP:32702
DescriptionACS002MQ
The revolution sensor dete

AT-118
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: 2005 July 2005 FX
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)PFP:32702
DescriptionACS002MQ
The revolution sensor detects the revolution of the idler gear parking pawl lock gear and emits a pulse signal.
The pulse signal is sent to the TCM which converts it into vehicle speed.
CONSULT-II Reference ValueACS003K4
On Board Diagnosis LogicACS002MR
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P0720 VEH SPD SEN/CIR AT” with CONSULT-II or 1st judgement flicker without
CONSULT-II is detected under the following conditions.
–When TCM does not receive the proper voltage signal from the sensor.
–After ignition switch is turned ON, irregular signal input from vehicle speed sensor MTR before the vehicle
starts moving.
Possible CauseACS002MS
Harness or connectors
(Sensor circuit is open or shorted.)
Revolution sensor
Vehicle speed sensor MTR
DTC Confirmation ProcedureACS002MT
CAUTION:
Always drive vehicle at a safe speed.
Be careful not to rev engine into the red zone on the tachometer.
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. Turn ignition switch ON. (Do not start engine.)
2. Select “ECU INPUT SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Drive vehicle and check for an increase of “VHCL/S SE·A/T” value in response to “VHCL/S SE·MTR” value.
If the check result is NG, go to AT- 1 2 1 , "
Diagnostic Procedure" .
If the check result is OK, go to following step.
5. Select “DATA MONITOR” mode for “A/T” with CONSULT-II.
6. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL SPEED SE: 30 km/h (19 MPH) or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Driving location: Driving the vehicle uphill (increased engine load) will help maintain the driving
conditions required for this test.
If the check result is NG, go to AT- 1 2 1 , "
Diagnostic Procedure" .
If the check result is OK, go to following step.
7. Maintain the following conditions for at least 5 consecutive seconds. ENGINE SPEED: 3,500 rpm or more
THRTL POS SEN: More than 1.0/8
Selector lever: “D” position
Item name Condition Display value (km/h)
VHCL/S SE·A/T During driving Approximately matches the speedometer reading.
BCIA0031E

Page 202 of 4731

INFINITI FX35 2005 Service Manual DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR) AT-119
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
Driving location: Driving the vehicle uphill (increased engine load) wi

Page 203 of 4731

INFINITI FX35 2005 Service Manual AT-120
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: 2005 July 2005 FX
Wiring Diagram — AT — VSSA/TACS0085G
TCWM0249E

Page 204 of 4731

INFINITI FX35 2005 Service Manual 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

Page 205 of 4731

INFINITI FX35 2005 Service Manual AT-122
DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)
Revision: 2005 July 2005 FX
4. CHECK SUB-HARNESS
1. Remove control valve with TCM. Refer to AT- 2 4 3 , "
Control Valve with TCM and A

Page 206 of 4731

INFINITI FX35 2005 Service Manual DTC P0725 ENGINE SPEED SIGNAL AT-123
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
DTC P0725 ENGINE SPEED SIGNALPFP:24825
DescriptionACS002MV
The engine speed signal is sent from

Page 207 of 4731

INFINITI FX35 2005 Service Manual 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 RESUL

Page 208 of 4731

INFINITI FX35 2005 Service Manual DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE AT-125
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionACS002N0

DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE AT-125
D E
F
G H
I
J
K L
M A
B
AT
Revision: 2005 July 2005 FX
DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVEPFP:31940
DescriptionACS002N0
The torque converter clutch solenoid valve is activated, with the gear in D5 , M4 and M5 by the TCM in
response to signals sent from the vehicle speed sensor and accelerator pedal position sensor (throttle
position sensor). Torque converter clutch piston operation will then be controlled.
Lock-up operation, however, is prohibited when A/T fluid temperature is too low.
When the accelerator pedal is depressed (less than 1.0/8) in lock-up condition, the engine speed should
not change abruptly. If there is a big jump in engine speed, there is no lock-up.
CONSULT-II Reference ValueACS002N1
On Board Diagnosis LogicACS002N2
This is an OBD-II self-diagnostic item.
Diagnostic trouble code “P0740 TCC SOLENOID/CIRC” with CONSULT-II or 3rd judgement flicker with-
out CONSULT-II is detected under the following conditions.
–When TCM detects an improper voltage drop when it tries to operate the solenoid valve.
–When TCM detects as irregular by comparing target value with monitor value.
Possible CauseACS002N3
Torque converter clutch solenoid valve
Harness or connectors
(Solenoid circuit is open or shorted.)
DTC Confirmation ProcedureACS002N4
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. Turn ignition switch ON. (Do not start engine.)
2. Select “MAIN SIGNALS” in “DATA MONITOR” mode for “A/T” with CONSULT-II.
3. Touch “START”.
4. Start engine and maintain the following conditions for at least 5 consecutive seconds.
VHCL SPEED SE: 80 km/h (50 MPH) or more
ACCELE POSI: 0.5/8 - 1.0/8
SELECTOR LEVER: “D” position
Driving location: Driving the vehicle uphill (increased
engine load) will help maintain the driving conditions
required for this test.
5. If DTC is detected go to AT- 1 2 6 , "
Diagnostic Procedure" .
WITH GST
Follow the procedure “WITH CONSULT-II”.
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
BCIA0031E

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