2004 INFINITI QX56 P0725

AT-2Revision: August 20072004 QX56 CONSULT-II Reference Value ..............................109
On Board Diagnosis Logic ....................................109
Possible Cause .....................................................109
DTC Confirmation Procedure ...............................109
Diagnostic Procedure ...........................................110
DTC P0720 VEHICLE SPEED SENSOR A/T (REV-
OLUTION SENSOR) ...............................................112
Description ............................................................112
CONSULT-II Reference Value ..............................112
On Board Diagnosis Logic ....................................112
Possible Cause .....................................................112
DTC Confirmation Procedure ...............................112
Diagnostic Procedure ...........................................113
DTC P0725 ENGINE SPEED SIGNAL ...................115
Description ............................................................115
CONSULT-II Reference Value ..............................115
On Board Diagnosis Logic ....................................115
Possible Cause .....................................................115
DTC Confirmation Procedure ...............................115
Diagnostic Procedure ...........................................115
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE .................................................118
Description ............................................................118
CONSULT-II Reference Value ..............................118
On Board Diagnosis Logic ....................................118
Possible Cause .....................................................118
DTC Confirmation Procedure ...............................118
Diagnostic Procedure ...........................................119
DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP) .121
Description ............................................................121
CONSULT-II Reference Value ..............................121
On Board Diagnosis Logic ....................................121
Possible Cause .....................................................121
DTC Confirmation Procedure ...............................121
Diagnostic Procedure ...........................................122
DTC P0745 LINE PRESSURE SOLENOID VALVE .124
Description ............................................................124
CONSULT-II Reference Value ..............................124
On Board Diagnosis Logic ....................................124
Possible Cause .....................................................124
DTC Confirmation Procedure ...............................124
Diagnostic Procedure ...........................................125
DTC P1702 TRANSMISSION CONTROL MODULE
(RAM) ......................................................................127
Description ............................................................127
On Board Diagnosis Logic ....................................127
Possible Cause .....................................................127
DTC Confirmation Procedure ...............................127
Diagnostic Procedure ...........................................127
DTC P1703 TRANSMISSION CONTROL MODULE
(ROM) ......................................................................128
Description ............................................................128
On Board Diagnosis Logic ....................................128
Possible Cause .....................................................128
DTC Confirmation Procedure ...............................128
Diagnostic Procedure ...........................................128
DTC P1705 THROTTLE POSITION SENSOR .......129
Description ............................................................129
CONSULT-II Reference Value ..............................129On Board Diagnosis Logic .................................... 129
Possible Cause ..................................................... 129
DTC Confirmation Procedure ................................ 129
Diagnostic Procedure ............................................ 129
DTC P1710 A/T FLUID TEMPERATURE SENSOR
CIRCUIT .................................................................. 131
Description ............................................................ 131
CONSULT-II Reference Value ............................... 131
On Board Diagnosis Logic .................................... 131
Possible Cause ..................................................... 131
DTC Confirmation Procedure ................................ 131
Diagnostic Procedure ............................................ 132
Component Inspection .......................................... 133
DTC P1716 TURBINE REVOLUTION SENSOR .... 134
Description ............................................................ 134
CONSULT-II Reference Value ............................... 134
On Board Diagnosis Logic .................................... 134
Possible Cause ..................................................... 134
DTC Confirmation Procedure ................................ 134
Diagnostic Procedure ............................................ 135
DTC P1721 VEHICLE SPEED SENSOR MTR ....... 136
Description ............................................................ 136
CONSULT-II Reference Value ............................... 136
On Board Diagnosis Logic .................................... 136
Possible Cause ..................................................... 136
DTC Confirmation Procedure ................................ 136
Diagnostic Procedure ............................................ 137
DTC P1730 A/T INTERLOCK ................................. 139
Description ............................................................ 139
On Board Diagnosis Logic .................................... 139
Possible Cause ..................................................... 139
DTC Confirmation Procedure ................................ 139
Judgement of A/T Interlock ................................... 140
Diagnostic Procedure ............................................ 140
DTC P1731 A/T 1ST ENGINE BRAKING ............... 142
Description ............................................................ 142
CONSULT-II Reference Value ............................... 142
On Board Diagnosis Logic .................................... 142
Possible Cause ..................................................... 142
DTC Confirmation Procedure ................................ 142
Diagnostic Procedure ............................................ 143
DTC P1752 INPUT CLUTCH SOLENOID VALVE .. 145
Description ............................................................ 145
CONSULT-II Reference Value ............................... 145
On Board Diagnosis Logic .................................... 145
Possible Cause ..................................................... 145
DTC Confirmation Procedure ................................ 145
Diagnostic Procedure ............................................ 146
DTC P1754 INPUT CLUTCH SOLENOID VALVE
FUNCTION .............................................................. 148
Description ............................................................ 148
CONSULT-II Reference Value ............................... 148
On Board Diagnosis Logic .................................... 148
Possible Cause ..................................................... 148
DTC Confirmation Procedure ................................ 148
Diagnostic Procedure ............................................ 149
DTC P1757 FRONT BRAKE SOLENOID VALVE ... 151
Description ............................................................ 151
CONSULT-II Reference Value ............................... 151

INDEX FOR DTC
AT-5
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
INDEX FOR DTCPFP:00024
Alphabetical Index UCS002BZ
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT-1 03
.
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.Items
(CONSULT- II screen terms) DTC
Reference page OBD- II Except OBD- II
CONSULT- II GST (*1) CONSULT- II only “A/T”
A/T 1ST E/BRAKING — P1731AT- 1 4 2
ATF PRES SW 1/CIRC — P1841AT- 1 7 5
ATF PRES SW 3/CIRC — P1843AT- 1 7 8
ATF PRES SW 5/CIRC — P1845AT- 1 8 1
ATF PRES SW 6/CIRC — P1846AT- 1 8 4
A/T INTERLOCK P1730 P1730AT- 1 3 9
A/T TCC S/V FNCTN P0744 P0744 AT- 1 2 1
ATF TEMP SEN/CIRC P0710 P1710AT- 1 3 1
CAN COMM CIRCUIT U1000 U1000AT- 1 0 3
D/C SOLENOID/CIRC P1762 P1762AT- 1 5 7
D/C SOLENOID FNCTN P1764 (*2 ) P1764 AT- 1 6 0
ENGINE SPEED SIG — P0725AT- 11 5
FR/B SOLENOID/CIRC P1757 P1757AT- 1 5 1
FR/B SOLENOID FNCT P1759 P1759 AT- 1 5 4
HLR/C SOL/CIRC P1767 P1767AT- 1 6 3
HLR/C SOL FNCTN P1769 (*2 ) P1769 AT- 1 6 6
I/C SOLENOID/CIRC P1752 P1752AT- 1 4 5
I/C SOLENOID FNCTN P1754 (*2 ) P1754 AT- 1 4 8
L/PRESS SOL/CIRC P0745 P0745AT- 1 2 4
LC/B SOLENOID/CIRC P1772 P1772AT- 1 6 9
LC/B SOLENOID FNCT P1774 P1774 AT- 1 7 2
PNP SW/CIRC P0705 P0705AT- 1 0 9
STARTER RELAY/CIRC — P0615AT- 1 0 5
TCC SOLENOID/CIRC P0740 P0740AT- 11 8
TCM P0700 P0700AT- 1 0 8
TCM·RAM — P1702AT- 1 2 7
TCM·ROM — P1703AT- 1 2 8
TP SEN/CIRC A/T — P1705AT- 1 2 9
TURBINE REV S/CIRC P1716 P1716AT- 1 3 4
VEH SPD SE/CIR·MTR — P1721AT- 1 3 6
VEH SPD SEN/CIR AT P0720 P0720AT- 11 2

AT-6
INDEX FOR DTC
Revision: August 20072004 QX56
DTC No. Index UCS002C0
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 1 0 3 , "
DTC U1000 CAN COMMUNICATION LINE" .
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.DTC
Items
(CONSULT- II screen terms)Reference page OBD- II Except OBD- II
CONSULT- II
GST (*1)C O N S U LT- I I
only “A/T”
— P0615 STARTER RELAY/CIRCAT- 1 0 5
P0700 P0700 TCMAT- 1 0 8
P0705 P0705 PNP SW/CIRCAT- 1 0 9
P0710 P1710 ATF TEMP SEN/CIRCAT- 1 3 1
P0720 P0720 VEH SPD SEN/CIR ATAT-11 2
— P0725 ENGINE SPEED SIGAT-11 5
P0740 P0740 TCC SOLENOID/CIRCAT-11 8
P0744 P0744 A/T TCC S/V FNCTNAT- 1 2 1
P0745 P0745 L/PRESS SOL/CIRCAT- 1 2 4
— P1702 TCM·RAMAT- 1 2 7
— P1703 TCM·ROMAT- 1 2 8
— P1705 TP SEN/CIRC A/TAT- 1 2 9
P1716 P1716 TURBINE REV S/CIRCAT- 1 3 6
— P1721 VEH SPD SE/CIR·MTRAT- 1 3 6
P1730 P1730 A/T INTERLOCKAT- 1 3 9
— P1731 A/T 1ST E/BRAKINGAT- 1 4 2
P1752 P1752 I/C SOLENOID/CIRCAT- 1 4 5
P1754 (*2 ) P1754 I/C SOLENOID FNCTNAT- 1 4 8
P1757 P1757 FR/B SOLENOID/CIRCAT- 1 5 1
P1759 (*2 ) P1759 FR/B SOLENOID FNCTAT- 1 5 4
P1762 P1762 D/C SOLENOID/CIRCAT- 1 5 7
P1764 (*2 ) P1764 D/C SOLENOID FNCTNAT- 1 6 0
P1767 P1767 HLR/C SOL/CIRCAT- 1 6 3
P1769 P1769 HLR/C SOL FNCTNAT- 1 6 6
P1772 P1772 LC/B SOLENOID/CIRCAT- 1 6 9
P1774 P1774 LC/B SOLENOID FNCTAT- 1 7 2
— P1841 ATF PRES SW 1/CIRCAT- 1 7 5
— P1843 ATF PRES SW 3/CIRCAT- 1 7 8
— P1845 ATF PRES SW 5/CIRCAT- 1 8 1
— P1846 ATF PRES SW 6/CIRCAT- 1 8 4
U1000 U1000 CAN COMM CIRCUITAT- 1 0 3

AT-48
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
4❏ Perform all road tests and enter checks in required inspection items.AT-6 1
4-1.Check before engine is started
AT-6 2
❏ AT-191, "AT CHECK Indicator Lamp Does Not Come On" .
❏ Perform self-diagnostics Enter checks for detected items. AT- 9 3
❏ AT- 1 0 3 , "DTC U1000 CAN COMMUNICATION LINE"
❏ AT- 1 0 5 , "DTC P0615 START SIGNAL CIRCUIT"
❏ AT- 1 0 8 , "DTC P0700 TCM"
❏ AT- 1 0 9 , "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ AT- 11 2 , "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"
❏ AT- 11 5 , "DTC P0725 ENGINE SPEED SIGNAL"
❏ AT- 11 8 , "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ AT- 1 2 1 , "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ AT- 1 2 4 , "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ AT- 1 2 7 , "DTC P1702 TRANSMISSION CONTROL MODULE (RAM)"
❏ AT- 1 2 8 , "DTC P1703 TRANSMISSION CONTROL MODULE (ROM)"
❏ AT- 1 2 9 , "DTC P1705 THROTTLE POSITION SENSOR"
❏ AT- 1 3 1 , "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"
❏ AT- 1 3 4 , "DTC P1716 TURBINE REVOLUTION SENSOR"
❏ AT- 1 3 6 , "DTC P1721 VEHICLE SPEED SENSOR MTR"
❏ AT- 1 3 9 , "DTC P1730 A/T INTERLOCK"
❏ AT- 1 4 2 , "DTC P1731 A/T 1ST ENGINE BRAKING"
❏ AT- 1 4 5 , "DTC P1752 INPUT CLUTCH SOLENOID VALVE"
❏ AT- 1 4 8 , "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT- 1 5 1 , "DTC P1757 FRONT BRAKE SOLENOID VALVE"
❏ AT- 1 5 4 , "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"
❏ AT- 1 5 7 , "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
❏ AT- 1 6 0 , "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT- 1 6 3 , "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"
❏ AT- 1 6 6 , "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION"
❏ AT- 1 6 9 , "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"
❏ AT- 1 7 2 , "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"
❏ AT- 1 7 5 , "DTC P1841 ATF PRESSURE SWITCH 1"
❏ AT- 1 7 8 , "DTC P1843 ATF PRESSURE SWITCH 3"
❏ AT- 1 8 1 , "DTC P1845 ATF PRESSURE SWITCH 5"
❏ AT- 1 8 4 , "DTC P1846 ATF PRESSURE SWITCH 6"
4-2.Idle inspection
AT-6 2
❏ AT-192, "Engine Cannot Be Started In “P” or “N” Position"
❏ AT-193, "In “P” Position, Vehicle Moves When Pushed"
❏ AT-194, "In “N” Position, Vehicle Moves"
❏ AT-195, "Large Shock (“N” to “D” Position)"
❏ AT-198, "Vehicle Does Not Creep Backward In “R” Position"
❏ AT-201, "Vehicle Does Not Creep Forward In “D” Position"
4-3.Driving tests
AT-6 3
Part 1
❏ AT-203, "
Vehicle Cannot Be Started From D1"
❏ AT-206, "A/T Does Not Shift: D1 → D2"
❏ AT-208, "A/T Does Not Shift: D2 → D3"
❏ AT-210, "A/T Does Not Shift: D3 → D4"
❏ AT-213, "A/T Does Not Shift: D4 → D5"
❏ AT-215, "A/T Does Not Perform Lock-up"
❏ AT-217, "A/T Does Not Hold Lock-up Condition"
❏ AT-219, "Lock-up Is Not Released"
❏ AT-220, "Engine Speed Does Not Return to Idle"

TROUBLE DIAGNOSIS
AT-49
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
44-3Part 2
AT- 6 5
❏ AT-203, "Vehicle Cannot Be Started From D1"
❏ AT-206, "A/T Does Not Shift: D1 → D2"
❏ AT-208, "A/T Does Not Shift: D2 → D3"
❏ AT-210, "A/T Does Not Shift: D3 → D4"
Part 3
AT- 6 6
❏ AT-221, "A/T Does Not Shift: 5th gear → 4th gear"
❏ AT-224, "A/T Does Not Shift: 4th gear → 3rd gear"
❏ AT-225, "A/T Does Not Shift: 3rd gear → 2nd gear"
❏ AT-227, "A/T Does Not Shift: 2nd gear → 1st gear"
❏ AT-230, "Vehicle Does Not Decelerate By Engine Brake"
❏ Perform self-diagnostics Enter checks for detected items. AT- 9 3
❏ AT-103, "DTC U1000 CAN COMMUNICATION LINE"
❏ AT-105, "DTC P0615 START SIGNAL CIRCUIT"
❏ AT-108, "DTC P0700 TCM"
❏ AT-109, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ AT-112, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"
❏ AT-115, "DTC P0725 ENGINE SPEED SIGNAL"
❏ AT-118, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ AT-121, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ AT-124, "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ AT-127, "DTC P1702 TRANSMISSION CONTROL MODULE (RAM)"
❏ AT-128, "DTC P1703 TRANSMISSION CONTROL MODULE (ROM)"
❏ AT-129, "DTC P1705 THROTTLE POSITION SENSOR"
❏ AT-131, "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"
❏ AT-134, "DTC P1716 TURBINE REVOLUTION SENSOR"
❏ AT-136, "DTC P1721 VEHICLE SPEED SENSOR MTR"
❏ AT-139, "DTC P1730 A/T INTERLOCK"
❏ AT-142, "DTC P1731 A/T 1ST ENGINE BRAKING"
❏ AT-145, "DTC P1752 INPUT CLUTCH SOLENOID VALVE"
❏ AT-148, "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-151, "DTC P1757 FRONT BRAKE SOLENOID VALVE"
❏ AT-154, "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"
❏ AT-157, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
❏ AT-160, "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-163, "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"
❏ AT-166, "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION"
❏ AT-169, "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"
❏ AT-172, "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"
❏ AT-175, "DTC P1841 ATF PRESSURE SWITCH 1"
❏ AT-178, "DTC P1843 ATF PRESSURE SWITCH 3"
❏ AT-181, "DTC P1845 ATF PRESSURE SWITCH 5"
❏ AT-184, "DTC P1846 ATF PRESSURE SWITCH 6"
5❏ Inspect each system for items found to be NG in the self-diagnostics and repair or replace the malfunction
parts.
6❏ Perform all road tests and enter the checks again for the required items.AT- 6 1
7❏ For any remaining NG items, perform the “diagnostics procedure” and repair or replace the malfunction parts.
See the chart for diagnostics by symptoms. (This chart also contains other symptoms and inspection proce-
dures.)AT- 6 8
8❏ Erase the results of the self-diagnostics from the TCM.AT- 4 0

AT-94
TROUBLE DIAGNOSIS
Revision: August 20072004 QX56
Display Items List
X: Applicable, —: Not applicable
Items (CONSULT-II
screen terms)Malfunction is detected when...TCM self-
diagnosisOBD-II (DTC)
“A/T” with
CONSULT-IIMIL indicator
lamp*1,
“ENGINE” with
CONSULT-II or
GST
CAN COMM CIRCUIT

When a malfunction is detected in CAN communications U1000 U1000
STARTER RELAY/
CIRC

If this signal is ON other than in P or N position, this is judged to be a
malfunction.
(And if it is OFF in P or N position, this too is judged to be a malfunc-
tion.)P0615 —
TCM

TCM is malfunctioning. P0700 P0700
PNP SW/CIRC

PNP switch 1-4 signals input with impossible pattern

PNP switch 3 monitor terminal cut line

“P” position is detected from N position without any other position
being detected in between.P0705 P0705
VEH SPD SEN/CIR AT
(Revolution sensor)

Signal from vehicle speed sensor A/T (Revolution sensor) not input
due to cut line or the like

Unexpected signal input during running

After ignition switch is turned ON, unexpected signal input from vehicle
speed sensor MTR before the vehicle starts movingP0720 P0720
ENGINE SPEED SIG

TCM does not receive the CAN communication signal from the ECM. P0725 —
TCC SOLENOID/CIRC

Normal voltage not applied to solenoid due to cut line, short, or the like P0740 P0740
A/T TCC S/V FNCTN

A/T cannot perform lock-up even if electrical circuit is good.

TCM detects as irregular by comparing difference value with slip rota-
tion.P0744 P0744*2
L/PRESS SOL/CIRC

Normal voltage not applied to solenoid due to cut line, short, or the like

TCM detects as irregular by comparing target value with monitor value.P0745 P0745
TCM·RAM

TCM memory (RAM) is malfunctioning. P1702 —
TCM·ROM

TCM memory (ROM) is malfunctioning. P1703 —
TP SEN/CIRC A/T

TCM does not receive the proper accelerator pedal position signals
(input by CAN communication) from ECM.P1705 P1705
ATF TEMP SEN/CIRC

During running, the ATF temperature sensor signal voltage is exces-
sively high or lowP1710 P0710
TURBINE REV S/CIRC

TCM does not receive the proper voltage signal from the sensor.

TCM detects an irregularity only at position of 4th gear for turbine revo-
lution sensor 2.P1716 P1716
VEH SPD SE/CIR·MTR

Signal (CAN communication) from vehicle speed sensor MTR not input
due to cut line or the like

Unexpected signal input during runningP1721 —
A/T INTERLOCK

Except during shift change, the gear position and ATF pressure switch
states are monitored and comparative judgement made.P1730 P1730
A/T 1ST E/BRAKING

Each ATF pressure switch and solenoid current is monitored and if a
pattern is detected having engine braking 1st gear other than in the M1
position, a malfunction is detected.P1731 —
I/C SOLENOID/CIRC

Normal voltage not applied to solenoid due to functional malfunction,
cut line, short, or the like

TCM detects as irregular by comparing target value with monitor value.P1752 P1752

DTC P0725 ENGINE SPEED SIGNAL
AT-115
D
E
F
G
H
I
J
K
L
MA
B
AT
Revision: August 20072004 QX56
DTC P0725 ENGINE SPEED SIGNALPFP:24825
DescriptionUCS002E1
The engine speed signal is sent from the ECM to the TCM.
CONSULT-II Reference ValueUCS002E2
On Board Diagnosis LogicUCS002E3

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

Diagnostic trouble code “ENGINE SPEED SIG” with CONSULT-II is detected when TCM does not receive
the ignition signal from ECM during engine cranking or running.
Possible CauseUCS002E4
Harness or connectors
(The ECM to the TCM circuit is open or shorted.)
DTC Confirmation ProcedureUCS002E5
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” and select “DATA MONITOR” mode for
“A/T” with CONSULT-II.
2. Start engine and maintain the following conditions for at least 10
consecutive seconds.
VHCL SPEED SE: 10 km/h (6 MPH) or more
ACCELE POSI: More than 1/8
Selector lever: “D” position
3. If DTC is detected, go to AT - 11 5 , "
Diagnostic Procedure" .
Diagnostic ProcedureUCS002E6
1. CHECK CAN COMMUNICATION LINE
Perform the self-diagnosis.Refer to AT- 9 3 , "
SELF-DIAGNOSTIC RESULT MODE" .
Is a malfunction in the CAN communication indicated in the results?
YES >> Check CAN communication line. Refer to AT- 1 0 3 , "DTC U1000 CAN COMMUNICATION LINE" .
NO >> GO TO 2.
Item name Condition Display value (rpm)
ENGINE SPEED Engine running Closely matches the tachometer reading.
BCIA0030E

AT-116
DTC P0725 ENGINE SPEED SIGNAL
Revision: August 20072004 QX56
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-583, "IGNITION SIGNAL" .
3. CHECK TCM
Perform TCM input/output signals inspection. Refer to AT- 9 0 , "
TCM Input/Output Signal Reference Values" .
OK or NG
OK >> GO TO 4.
NG >> GO TO 6.
4. CHECK DTC
Perform “DTC Confirmation Procedure”.

Refer to AT-115, "DTC Confirmation Procedure" .
OK or NG
OK >>INSPECTION END
NG >> GO TO 5.
5. 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-241, "Control Valve With TCM and A/T Fluid
Temperature Sensor 2" .
NG >> Repair or replace damaged parts.
6. DETECT MALFUNCTIONING ITEM
Check the following items:

Power supply and ground circuit for TCM.

The A/T assembly harness connector terminals for damage or loose connection with harness connector.
OK or NG
OK >> GO TO 7.
NG >> Repair or replace damaged parts.
Item name Condition Display value (rpm)
ENGINE SPEED Engine running Closely matches the tachometer reading.
PCIA0041E