2007 INFINITI QX56 DTC

ACS-52
< SERVICE INFORMATION >[ICC]
TROUBLE DIAGNOSIS FOR SYMPTOMS
• When depressing the accelerator.
• Chime does not sound when the vehicle is not driving.
• Chime does not sound when the system does not detect any vehicle ahead. Diagnose the conditions under
which the system is detecting the vehicle ahead and when the system is malfunctioning. If there is any mal-
function in detecting the vehicle ahead. Refer to ACS-52, "
Symptom 7 the ICC System Frequently Cannot
Detect the Vehicle Ahead/The Detection Zone Is Short".
1.CHECK ICC WARNING CHIME
With CONSULT-II
1. With "ACTIVE TEST" on the CONSULT-II, check that ICC warning chime operates normally.
OK or NG
OK >> Determine preceding vehicle detection status when malfunction occurred. If chime should have
sounded replace ICC unit. Refer to ACS-55, "
ICC Unit". Perform ICC system running test. Refer
to ACS-9, "
ICC System Running Test". Then perform self-diagnosis of ICC system again.
NG >> GO TO 2.
2.CAN COMMUNICATION INSPECTION
With CONSULT-II
1. With CONSULT-II self-diagnosis, check “CAN COMM CIRCUIT”.
OK or NG
OK >> Refer to ACS-37, "DTC 20 CAN COMM CIRCUIT".
NG >> Replace combination meter. Refer to DI-21, "
Removal and Installation of Combination Meter".
Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC System Running Test".
Then perform self-diagnosis of ICC system again.
Symptom 6 Driving Force Is HuntingINFOID:0000000003533820
1.CHECK ECM
1. Perform self-diagnosis of ECM.
OK or NG
OK >> Refer to ACS-52, "Symptom 7 the ICC System Frequently Cannot Detect the Vehicle Ahead/The
Detection Zone Is Short".
NG >> Repair as necessary. Erase DTC and perform ICC system running test. Refer to ACS-9, "
ICC
System Running Test". Then perform self-diagnosis of ICC system again.
Symptom 7 the ICC System Frequently Cannot Detect the Vehicle Ahead/The Detec-
tion Zone Is Short
INFOID:0000000003533821
The detection function may become disrupted in the following cases:
• When the reflector of the vehicle ahead is small or not clean enough to reflect the laser.
• When driving a road with extremely sharp corners.
• When the laser cannot detect the reflector of the vehicle ahead as the vehicle ahead is passing a hill or
passing the peak.
1.VISUAL CHECK
1. Check ICC sensor body window for contamination and foreign materials.
OK or NG
OK >> If any contamination or foreign materials are found, remove them. Then perform ICC system run-
ning test. Refer to ACS-9, "
ICC System Running Test".
NG >> GO TO 2.
2.CHECK FUNCTION
1. After performing laser beam aiming adjustment, perform ICC system running test. Refer to ACS-9, "
ICC
System Running Test". Check that preceding vehicle detection performance has been improved.
OK or NG
OK >> Inspection End.
NG >> • Replace ICC sensor and perform laser beam aiming adjustment. Refer to ACS-55, "
ICC Sen-
sor".

AT-1
TRANSMISSION/TRANSAXLE
D
E
F
G
H
I
J
K
L
M
SECTION AT
A
B
AT
N
O
P
CONTENTS
AUTOMATIC TRANSMISSION
SERVICE INFORMATION ............................6
INDEX FOR DTC .................................................6
Alphabetical Index .....................................................6
DTC No. Index ..........................................................6
PRECAUTIONS ...................................................8
Precaution for Supplemental Restraint System
(SRS) "AIR BAG" and "SEAT BELT PRE-TEN-
SIONER" ...................................................................
8
Precaution for On Board Diagnosis (OBD) System
of A/T and Engine .....................................................
8
Precaution .................................................................8
Service Notice or Precaution .....................................9
PREPARATION ..................................................11
Special Service Tool ...............................................11
Commercial Service Tool ........................................12
A/T FLUID ...........................................................13
Changing Automatic Transmission Fluid (ATF) ......13
Checking Automatic Transmission Fluid (ATF) .......13
A/T Fluid Cooler Cleaning .......................................15
A/T CONTROL SYSTEM ....................................19
Cross-Sectional View (2WD models) ......................19
Cross-Sectional View (4WD models) ......................20
Shift Mechanism ......................................................20
TCM Function ..........................................................31
CAN Communication ...............................................32
Input/Output Signal of TCM .....................................33
Line Pressure Control .............................................33
Shift Control ............................................................35
Lock-up Control .......................................................36
Engine Brake Control ..............................................37
Control Valve ...........................................................37
ON BOARD DIAGNOSTIC (OBD) SYSTEM ......39
Introduction .............................................................39
OBD-II Function for A/T System ..............................39
One or Two Trip Detection Logic of OBD-II ............39
OBD-II Diagnostic Trouble Code (DTC) ..................39
Malfunction Indicator Lamp (MIL) ............................41
TROUBLE DIAGNOSIS ....................................43
DTC Inspection Priority Chart ..................................43
Fail-Safe ..................................................................43
How To Perform Trouble Diagnosis for Quick and
Accurate Repair .......................................................
44
A/T Electrical Parts Location ...................................50
Circuit Diagram ........................................................51
Inspections Before Trouble Diagnosis .....................51
Check Before Engine Is Started ..............................55
Check at Idle ............................................................55
Cruise Test - Part 1 .................................................56
Cruise Test - Part 2 .................................................58
Cruise Test - Part 3 .................................................59
Vehicle Speed When Shifting Gears .......................59
Vehicle Speed When Performing and Releasing
Complete Lock-up ...................................................
60
Vehicle Speed When Performing and Releasing
Slip Lock-up .............................................................
60
Symptom Chart ........................................................60
TCM Input/Output Signal Reference Value .............82
CONSULT-II Function (A/T) ....................................83
DTC U1000 CAN COMMUNICATION LINE .....91
Description ...............................................................91
On Board Diagnosis Logic .......................................91
Possible Cause ........................................................91
DTC Confirmation Procedure ..................................91
Wiring Diagram - AT - CAN .....................................92
Diagnosis Procedure ...............................................93
DTC P0615 START SIGNAL CIRCUIT .............94
Description ...............................................................94
CONSULT-II Reference Value in Data Monitor
Mode ........................................................................
94
On Board Diagnosis Logic .......................................94
Possible Cause ........................................................94
DTC Confirmation Procedure ..................................94
Wiring Diagram - AT - STSIG ..................................95
Diagnosis Procedure ...............................................95

AT-2
DTC P0700 TCM ................................................98
Description ..............................................................98
On Board Diagnosis Logic ......................................98
Possible Cause .......................................................98
DTC Confirmation Procedure .................................98
Diagnosis Procedure ..............................................98
DTC P0705 PARK/NEUTRAL POSITION
SWITCH .............................................................
99
Description ..............................................................99
CONSULT-II Reference Value in Data Monitor
Mode .......................................................................
99
On Board Diagnosis Logic ......................................99
Possible Cause .......................................................99
DTC Confirmation Procedure .................................99
Wiring Diagram - AT - PNP/SW .............................100
Diagnosis Procedure .............................................100
DTC P0717 TURBINE REVOLUTION SEN-
SOR ..................................................................
103
Description .............................................................103
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
103
On Board Diagnosis Logic .....................................103
Possible Cause ......................................................103
DTC Confirmation Procedure ................................103
Diagnosis Procedure .............................................103
DTC P0720 VEHICLE SPEED SENSOR A/T
(REVOLUTION SENSOR) ...............................
105
Description .............................................................105
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
105
On Board Diagnosis Logic .....................................105
Possible Cause ......................................................105
DTC Confirmation Procedure ................................105
Wiring Diagram - AT - VSSA/T ..............................106
Diagnosis Procedure .............................................107
DTC P0725 ENGINE SPEED SIGNAL ............109
Description .............................................................109
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
109
On Board Diagnosis Logic .....................................109
Possible Cause ......................................................109
DTC Confirmation Procedure ................................109
Diagnosis Procedure .............................................109
DTC P0740 TORQUE CONVERTER CLUTCH
SOLENOID VALVE ..........................................
111
Description .............................................................111
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
111
On Board Diagnosis Logic .....................................111
Possible Cause ......................................................111
DTC Confirmation Procedure ................................111
Diagnosis Procedure .............................................111
DTC P0744 A/T TCC S/V FUNCTION (LOCK-
UP) ...................................................................
113
Description ............................................................113
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
113
On Board Diagnosis Logic ....................................113
Possible Cause .....................................................113
DTC Confirmation Procedure ................................113
Diagnosis Procedure .............................................114
DTC P0745 LINE PRESSURE SOLENOID
VALVE ..............................................................
115
Description ............................................................115
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
115
On Board Diagnosis Logic ....................................115
Possible Cause .....................................................115
DTC Confirmation Procedure ................................115
Diagnosis Procedure .............................................115
DTC P1705 THROTTLE POSITION SENSOR ..117
Description ............................................................117
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
117
On Board Diagnosis Logic ....................................117
Possible Cause .....................................................117
DTC Confirmation Procedure ................................117
Diagnosis Procedure .............................................117
DTC P1710 A/T FLUID TEMPERATURE SEN-
SOR CIRCUIT ...................................................
119
Description ............................................................119
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
119
On Board Diagnosis Logic ....................................119
Possible Cause .....................................................119
DTC Confirmation Procedure ................................119
Wiring Diagram - AT - FTS ...................................120
Diagnosis Procedure .............................................120
Component Inspection ..........................................122
DTC P1721 VEHICLE SPEED SENSOR MTR ..124
Description ............................................................124
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
124
On Board Diagnosis Logic ....................................124
Possible Cause .....................................................124
DTC Confirmation Procedure ................................124
Diagnosis Procedure .............................................124
DTC P1730 A/T INTERLOCK ...........................126
Description ............................................................126
On Board Diagnosis Logic ....................................126
Possible Cause .....................................................126
DTC Confirmation Procedure ................................126
Judgement of A/T Interlock ...................................126
Diagnosis Procedure .............................................127
DTC P1731 A/T 1ST ENGINE BRAKING ........128
Description ............................................................128
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
128

AT-3
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P N On Board Diagnosis Logic ....................................
128
Possible Cause .....................................................128
DTC Confirmation Procedure ................................128
Diagnosis Procedure .............................................128
DTC P1752 INPUT CLUTCH SOLENOID
VALVE ..............................................................
130
Description ............................................................130
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
130
On Board Diagnosis Logic ....................................130
Possible Cause .....................................................130
DTC Confirmation Procedure ................................130
Diagnosis Procedure .............................................130
DTC P1754 INPUT CLUTCH SOLENOID
VALVE FUNCTION ..........................................
132
Description ............................................................132
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
132
On Board Diagnosis Logic ....................................132
Possible Cause .....................................................132
DTC Confirmation Procedure ................................132
Diagnosis Procedure .............................................133
DTC P1757 FRONT BRAKE SOLENOID
VALVE ..............................................................
134
Description ............................................................134
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
134
On Board Diagnosis Logic ....................................134
Possible Cause .....................................................134
DTC Confirmation Procedure ................................134
Diagnosis Procedure .............................................134
DTC P1759 FRONT BRAKE SOLENOID
VALVE FUNCTION ..........................................
136
Description ............................................................136
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
136
On Board Diagnosis Logic ....................................136
Possible Cause .....................................................136
DTC Confirmation Procedure ................................136
Diagnosis Procedure .............................................137
DTC P1762 DIRECT CLUTCH SOLENOID
VALVE ..............................................................
138
Description ............................................................138
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
138
On Board Diagnosis Logic ....................................138
Possible Cause .....................................................138
DTC Confirmation Procedure ................................138
Diagnosis Procedure .............................................138
DTC P1764 DIRECT CLUTCH SOLENOID
VALVE FUNCTION ..........................................
140
Description ............................................................140
CONSULT-II Reference Value in Data Monitor
Mode .....................................................................
140
On Board Diagnosis Logic .....................................140
Possible Cause ......................................................140
DTC Confirmation Procedure ................................140
Diagnosis Procedure .............................................141
DTC P1767 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE .........................
142
Description .............................................................142
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
142
On Board Diagnosis Logic .....................................142
Possible Cause ......................................................142
DTC Confirmation Procedure ................................142
Diagnosis Procedure .............................................142
DTC P1769 HIGH AND LOW REVERSE
CLUTCH SOLENOID VALVE FUNCTION ......
144
Description .............................................................144
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
144
On Board Diagnosis Logic .....................................144
Possible Cause ......................................................144
DTC Confirmation Procedure ................................144
Diagnosis Procedure .............................................145
DTC P1772 LOW COAST BRAKE SOLENOID
VALVE .............................................................
146
Description .............................................................146
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
146
On Board Diagnosis Logic .....................................146
Possible Cause ......................................................146
DTC Confirmation Procedure ................................146
Diagnosis Procedure .............................................146
DTC P1774 LOW COAST BRAKE SOLENOID
VALVE FUNCTION .........................................
148
Description .............................................................148
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
148
On Board Diagnosis Logic .....................................148
Possible Cause ......................................................148
DTC Confirmation Procedure ................................148
Diagnosis Procedure .............................................149
DTC P1841 ATF PRESSURE SWITCH 1 .......150
Description .............................................................150
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
150
On Board Diagnosis Logic .....................................150
Possible Cause ......................................................150
DTC Confirmation Procedure ................................150
Diagnosis Procedure .............................................150
DTC P1843 ATF PRESSURE SWITCH 3 .......152
Description .............................................................152
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
152
On Board Diagnosis Logic .....................................152
Possible Cause ......................................................152

AT-4
DTC Confirmation Procedure ................................152
Diagnosis Procedure .............................................152
DTC P1845 ATF PRESSURE SWITCH 5 ........154
Description .............................................................154
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
154
On Board Diagnosis Logic .....................................154
Possible Cause ......................................................154
DTC Confirmation Procedure ................................154
Diagnosis Procedure .............................................154
DTC P1846 ATF PRESSURE SWITCH 6 ........156
Description .............................................................156
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
156
On Board Diagnosis Logic .....................................156
Possible Cause ......................................................156
DTC Confirmation Procedure ................................156
Diagnosis Procedure .............................................156
MAIN POWER SUPPLY AND GROUND CIR-
CUIT .................................................................
158
Wiring Diagram - AT - MAIN ..................................158
Diagnosis Procedure .............................................159
CLOSED THROTTLE POSITION AND WIDE
OPEN THROTTLE POSITION CIRCUIT .........
161
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
161
Diagnosis Procedure .............................................161
BRAKE SIGNAL CIRCUIT ..............................162
CONSULT-II Reference Value in Data Monitor
Mode ......................................................................
162
Diagnosis Procedure .............................................162
TOW MODE SWITCH ......................................163
Description .............................................................163
Wiring Diagram - AT - TMSW ................................163
Diagnosis Procedure .............................................164
TROUBLE DIAGNOSIS FOR SYMPTOMS .....165
Wiring Diagram - AT - NONDTC ............................165
A/T Check Indicator Lamp Does Not Come On .....167
Engine Cannot Be Started in "P" or "N" Position ...168
In "P" Position, Vehicle Moves When Pushed .......168
In "N" Position, Vehicle Moves ..............................169
Large Shock ("N" to "D" Position) ..........................170
Vehicle Does Not Creep Backward in "R" Position ..172
Vehicle Does Not Creep Forward in "D" Position ..175
Vehicle Cannot Be Started from D1 .......................177
A/T Does Not Shift: D1→ D2 ..................................179
A/T Does Not Shift: D2→ D3 ..................................181
A/T Does Not Shift: D3→ D4 ..................................183
A/T Does Not Shift: D4→ D5 ..................................185
A/T Does Not Perform Lock-up .............................187
A/T Does Not Hold Lock-up Condition ...................189
Lock-up Is Not Released .......................................190
Engine Speed Does Not Return to Idle .................191
A/T Does Not Shift: 5th gear → 4th gear ..............192
A/T Does Not Shift: 4th gear → 3rd gear ..............194
A/T Does Not Shift: 3rd gear → 2nd gear .............196
A/T Does Not Shift: 2nd gear → 1st gear .............197
Vehicle Does Not Decelerate By Engine Brake ....199
A/T SHIFT LOCK SYSTEM ..............................202
Description ............................................................202
Shift Lock System Electrical Parts Location ..........202
Wiring Diagram - AT - SHIFT ................................203
Shift Lock Control Unit Reference Value ..............204
Component Inspection ..........................................204
SHIFT CONTROL SYSTEM .............................207
Control Device Removal and Installation ..............207
Adjustment of A/T Position ....................................208
Checking of A/T Position .......................................208
ON-VEHICLE SERVICE ...................................209
Oil Pan ..................................................................209
Control Valve with TCM and A/T Fluid Tempera-
ture Sensor 2 ........................................................
210
Rear Oil Seal .........................................................219
AIR BREATHER HOSE ....................................221
Removal and Installation .......................................221
TRANSMISSION ASSEMBLY ..........................223
Removal and Installation (2WD) ...........................223
Removal and Installation (4WD) ...........................225
OVERHAUL ......................................................228
Component ...........................................................228
Oil Channel ...........................................................235
Location of Adjusting Shims, Needle Bearings,
Thrust Washers and Snap Rings ..........................
237
DISASSEMBLY ................................................240
Disassembly ..........................................................240
REPAIR FOR COMPONENT PARTS ..............258
Oil Pump ...............................................................258
Front Sun Gear, 3rd One-Way Clutch ...................260
Front Carrier, Input Clutch, Rear Internal Gear .....262
Mid Sun Gear, Rear Sun Gear, High and Low Re-
verse Clutch Hub ..................................................
267
High and Low Reverse Clutch ..............................272
Direct Clutch .........................................................274
ASSEMBLY ......................................................277
Assembly (1) .........................................................277
Adjustment ............................................................290
Assembly (2) .........................................................292
SERVICE DATA AND SPECIFICATIONS
(SDS) ................................................................
298
General Specification ............................................298
Vehicle Speed When Shifting Gears .....................298
Vehicle Speed When Performing and Releasing
Complete Lock-up .................................................
299
Stall Speed ............................................................299

AT-6
< SERVICE INFORMATION >
INDEX FOR DTC
SERVICE INFORMATION
INDEX FOR DTC
Alphabetical IndexINFOID:0000000003532216
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 9 1
.
*1: These numbers are prescribed by SAE J2012.
*2: These malfunctions cannot be displayed MIL if another malfunction is assigned to MIL.
DTC No. IndexINFOID:0000000003532217
NOTE:
If DTC U1000 is displayed with other DTC, first perform the trouble diagnosis for DTC U1000. Refer to
AT- 9 1
.
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 2 8
ATF PRES SW 1/CIRC — P1841AT- 1 5 0
ATF PRES SW 3/CIRC — P1843AT- 1 5 2
ATF PRES SW 5/CIRC — P1845AT- 1 5 4
ATF PRES SW 6/CIRC — P1846AT- 1 5 6
A/T INTERLOCK P1730 P1730AT- 1 2 6
A/T TCC S/V FNCTN P0744 P0744 AT- 11 3
ATF TEMP SEN/CIRC P0710 P1710AT- 11 9
CAN COMM CIRCUIT U1000 U1000AT- 9 1
D/C SOLENOID/CIRC P1762 P1762AT- 1 3 8
D/C SOLENOID FNCTN P1764 (*2) P1764 AT- 1 4 0
ENGINE SPEED SIG — P0725AT- 1 0 9
FR/B SOLENOID/CIRC P1757 P1757AT- 1 3 4
FR/B SOLENOID FNCT P1759 P1759 AT- 1 3 6
HLR/C SOL/CIRC P1767 P1767AT- 1 4 2
HLR/C SOL FNCTN P1769 (*2) P1769 AT- 1 4 4
I/C SOLENOID/CIRC P1752 P1752AT- 1 3 0
I/C SOLENOID FNCTN P1754 (*2) P1754 AT- 1 3 2
L/PRESS SOL/CIRC P0745 P0745AT- 11 5
LC/B SOLENOID/CIRC P1772 P1772AT- 1 4 6
LC/B SOLENOID FNCT P1774 P1774 AT- 1 4 8
PNP SW/CIRC P0705 P0705AT- 9 9
STARTER RELAY/CIRC — P0615AT- 9 4
TCC SOLENOID/CIRC P0740 P0740AT- 111
TCM P0700 P0700AT- 9 8
TP SEN/CIRC A/T — P1705AT- 11 7
TURBINE REV S/CIRC P0717 P0717AT- 1 0 3
VEH SPD SE/CIR·MTR — P1721AT- 1 2 4
VEH SPD SEN/CIR AT P0720 P0720AT- 1 0 5

INDEX FOR DTC
AT-7
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
*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- 9 4
P0700 P0700 TCMAT- 9 8
P0705 P0705 PNP SW/CIRCAT- 9 9
P0710 P1710 ATF TEMP SEN/CIRCAT- 11 9
P0717 P0717 TURBINE REV S/CIRCAT- 1 0 3
P0720 P0720 VEH SPD SEN/CIR ATAT- 1 0 5
— P0725 ENGINE SPEED SIGAT- 1 0 9
P0740 P0740 TCC SOLENOID/CIRCAT- 111
P0744 P0744 A/T TCC S/V FNCTNAT- 11 3
P0745 P0745 L/PRESS SOL/CIRCAT- 11 5
— P1705 TP SEN/CIRC A/TAT- 11 7
— P1721 VEH SPD SE/CIR·MTRAT- 1 2 4
P1730 P1730 A/T INTERLOCKAT- 1 2 6
— P1731 A/T 1ST E/BRAKINGAT- 1 2 8
P1752 P1752 I/C SOLENOID/CIRCAT- 1 3 0
P1754 (*2) P1754 I/C SOLENOID FNCTNAT- 1 3 2
P1757 P1757 FR/B SOLENOID/CIRCAT- 1 3 4
P1759 (*2) P1759 FR/B SOLENOID FNCTAT- 1 3 6
P1762 P1762 D/C SOLENOID/CIRCAT- 1 3 8
P1764 (*2) P1764 D/C SOLENOID FNCTNAT- 1 4 0
P1767 P1767 HLR/C SOL/CIRCAT- 1 4 2
P1769 P1769 HLR/C SOL FNCTNAT- 1 4 4
P1772 P1772 LC/B SOLENOID/CIRCAT- 1 4 6
P1774 P1774 LC/B SOLENOID FNCTAT- 1 4 8
— P1841 ATF PRES SW 1/CIRCAT- 1 5 0
— P1843 ATF PRES SW 3/CIRCAT- 1 5 2
— P1845 ATF PRES SW 5/CIRCAT- 1 5 4
— P1846 ATF PRES SW 6/CIRCAT- 1 5 6
U1000 U1000 CAN COMM CIRCUITAT- 9 1

PRECAUTIONS
AT-9
< SERVICE INFORMATION >
D
E
F
G
H
I
J
K
L
MA
B
AT
N
O
P
•After performing each TROUBLE DIAGNOSIS, perform “DTC
(Diagnostic Trouble Code) CONFIRMATION PROCEDURE”.
If the repair is completed the DTC should not be displayed in
the “DTC CONFIRMATION PROCEDURE”.
• Always use the specified brand of ATF. Refer to MA-10
.
• Use paper rags not cloth rags during work.
• After replacing the ATF, dispose of the waste oil using the methods prescribed by law, ordinance, etc.
• Before proceeding with disassembly, thoroughly clean the outside of the transmission. It is important to pre-
vent the internal parts from becoming contaminated by dirt or other foreign matter.
• Disassembly should be done in a clean work area.
• Use lint-free cloth or towels for wiping parts clean. Common shop rags can leave fibers that could interfere
with the operation of the transmission.
• Place disassembled parts in order for easier and proper assembly.
• All parts should be carefully cleaned with a general purpose, non-flammable solvent before inspection or
reassembly.
• Gaskets, seals and O-rings should be replaced any time the transmission is disassembled.
• It is very important to perform functional tests whenever they are indicated.
• The valve body contains precision parts and requires extreme care when parts are removed and serviced.
Place disassembled valve body parts in order for easier and proper assembly. Care will also prevent springs
and small parts from becoming scattered or lost.
• Properly installed valves, sleeves, plugs, etc. will slide along bores in valve body under their own weight.
• Before assembly, apply a coat of recommended ATF to all parts. Apply petroleum jelly to protect O-rings and
seals, or hold bearings and washers in place during assembly. Do not use grease.
• Extreme care should be taken to avoid damage to O-rings, seals and gaskets when assembling.
• Clean or replace ATF cooler if excessive foreign material is found in oil pan or clogging strainer. Refer to AT-
15, "A/T Fluid Cooler Cleaning".
• After overhaul, refill the transmission with new ATF.
• When the A/T drain plug is removed, only some of the fluid is drained. Old A/T fluid will remain in torque con-
verter and ATF cooling system.
Always follow the procedures under “Changing A/T Fluid” in the AT section when changing A/T fluid. Refer to
AT-13, "
Changing Automatic Transmission Fluid (ATF)", AT-13, "Checking Automatic Transmission Fluid
(ATF)".
Service Notice or PrecautionINFOID:0000000003532221
ATF COOLER SERVICE
If A/T fluid contains frictional material (clutches, bands, etc.), or if an A/T is repaired, overhauled, or replaced,
inspect and clean the A/T fluid cooler mounted in the radiator or replace the radiator. Flush cooler lines using
cleaning solvent and compressed air after repair. For A/T fluid cooler cleaning procedure, refer to AT-15, "
A/T
Fluid Cooler Cleaning". For radiator replacement, refer to CO-13.
CHECKING AND CHANGING A/T FLUID SERVICE
Increase ATF temperature by 80°C (176°F) once, and then check ATF level in 65°C (149°F) when adjusting
ATF level.
NOTE:
JA60 uses both systems of a water-cooling and of an air-cooling. Air-cooling system has a by-pass valve.
When ATF temperature is not over 50°C (122°F) with water-cooling system OFF, it does not flow to air-cooling
system. If ATF level is set without the flow of ATF, the level will be 10mm lower than the standard. Therefore,
piping should be filled with ATF when adjusting level.
OBD-II SELF-DIAGNOSIS
• A/T self-diagnosis is performed by the TCM in combination with the ECM. Refer to the table on AT-83,
"CONSULT-II Function (A/T)" for the indicator used to display each self-diagnostic result.
SEF217U