idle INFINITI M35 2007 Factory User Guide
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AT-44
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
TROUBLE DIAGNOSISPFP:00004
DTC Inspection Priority ChartNCS001K2
If some DTCs are displayed at the same time, perform inspections one by one based on the following priority
chart.
NOTE:
If DTC “U1000” is displayed with other DTC, first perform the trouble diagnosis for “DTC U1000 CAN
COMMUNICATION LINE”. Refer to AT- 1 0 5
.
Fail-safeNCS001K3
The TCM has an electrical fail-safe mode. This mode makes it possible to operate even if there is an error in a
main electronic control input/output signal circuit.
In fail-safe mode, even if the selector lever is “D” or “M” mode, the A/T is fixed in 2nd, 4th and 5th (depending
on the breakdown position), so the customer should feel “slipping” or “poor acceleration”.
Even when the electronic circuits are normal, under special conditions (for example, when slamming on the
brake with the wheels spinning drastically and stopping the tire rotation), the A/T can go into fail-safe mode. If
this happens, switch OFF the ignition switch for 10 seconds, then switch it ON again to return to the normal
shift pattern. Therefore, the customer's vehicle has returned to normal, so handle according to the “WORK
FLOW” (Refer to AT- 4 7
).
FAIL-SAFE FUNCTION
If any malfunction occurs in a sensor or solenoid, this function controls the A/T to mark driving possible.
Vehicle Speed Sensor
Signals are input from two systems - from vehicle speed sensor A/T (revolution sensor) installed on the A/
T and from combination meter so normal driving is possible even if there is a malfunction in one of the
systems. And if vehicle speed sensor A/T (revolution sensor) has unusual cases, 5th gear and manual
mode are prohibited.
Accelerator Pedal Position Sensor
If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow
systems, the engine speed is fixed by ECM to a pre-determined engine speed to make driving possible.
Throttle Position Sensor
If there is a malfunction in one of the systems, the accelerator opening angle is controlled by ECM accord-
ing to a pre-determined accelerator angle to make driving possible. And if there are malfunctions in tow
systems, the accelerator opening angle is controlled by the idle signal sent from the ECM which is based
on input indicating either idle condition or off-idle condition (pre-determined accelerator opening) in order
to make driving possible.
PNP Switch
In the unlikely event that a malfunction signal enters the TCM, the position indicator is switched OFF, the
starter relay is switched OFF (starter starting is disabled), the back-up lamp relay switched OFF (back-up
lamp is OFF) and the position is fixed to the “D” position to make driving possible.
Starter Relay
The starter relay is switched OFF. (Starter starting is disabled.)
Priority Detected items (DTC)
1 U1000 CAN communication line
2 Except above
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4❏ Perform all road tests and enter checks in required inspection items.AT- 5 7
4-1.Check before engine is started AT- 5 7
❏ AT- 1 9 0 , "A/T CHECK Indicator Lamp Does Not Come On"
❏ Perform self-diagnostics. Enter checks for detected items. AT- 9 2 ,AT-103
❏ AT-105, "DTC U1000 CAN COMMUNICATION LINE"
❏ AT-108, "DTC P0615 START SIGNAL CIRCUIT"
❏ AT-112, "DTC P0700 TCM"
❏ AT-113, "DTC P0705 PARK/NEUTRAL POSITION SWITCH"
❏ AT-117, "DTC P0717 TURBINE REVOLUTION SENSOR"
❏ AT-119, "DTC P0720 VEHICLE SPEED SENSOR A/T (REVOLUTION SENSOR)"
❏ AT-124, "DTC P0725 ENGINE SPEED SIGNAL"
❏ AT-126, "DTC P0740 TORQUE CONVERTER CLUTCH SOLENOID VALVE"
❏ AT-128, "DTC P0744 A/T TCC S/V FUNCTION (LOCK-UP)"
❏ AT-130, "DTC P0745 LINE PRESSURE SOLENOID VALVE"
❏ AT-132, "DTC P1705 THROTTLE POSITION SENSOR"
❏ AT-135, "DTC P1710 A/T FLUID TEMPERATURE SENSOR CIRCUIT"
❏ AT-140, "DTC P1721 VEHICLE SPEED SENSOR MTR"
❏ AT-142, "DTC P1730 A/T INTERLOCK"
❏ AT-145, "DTC P1731 A/T 1ST ENGINE BRAKING"
❏ AT-147, "DTC P1752 INPUT CLUTCH SOLENOID VALVE"
❏ AT-149, "DTC P1754 INPUT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-151, "DTC P1757 FRONT BRAKE SOLENOID VALVE"
❏ AT-153, "DTC P1759 FRONT BRAKE SOLENOID VALVE FUNCTION"
❏ AT-155, "DTC P1762 DIRECT CLUTCH SOLENOID VALVE"
❏ AT-157, "DTC P1764 DIRECT CLUTCH SOLENOID VALVE FUNCTION"
❏ AT-159, "DTC P1767 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE"
❏ AT-161, "DTC P1769 HIGH AND LOW REVERSE CLUTCH SOLENOID VALVE
FUNCTION"
❏ AT-163, "DTC P1772 LOW COAST BRAKE SOLENOID VALVE"
❏ AT-165, "DTC P1774 LOW COAST BRAKE SOLENOID VALVE FUNCTION"
❏ AT-167, "DTC P1815 MANUAL MODE SWITCH"
❏ AT-172, "DTC P1841 ATF PRESSURE SWITCH 1"
❏ AT-174, "DTC P1843 ATF PRESSURE SWITCH 3"
❏ AT-176, "DTC P1845 ATF PRESSURE SWITCH 5"
❏ AT-178, "DTC P1846 ATF PRESSURE SWITCH 6"
4-2.Check at IdleAT- 5 7
❏ AT- 1 9 0 , "Engine Cannot Be Started in “P” or “N” Position"
❏ AT- 1 9 1 , "In “P” Position, Vehicle Moves When Pushed"
❏ AT- 1 9 2 , "In “N” Position, Vehicle Moves"
❏ AT- 1 9 3 , "Large Shock (“N” to “D” Position)"
❏ AT- 1 9 5 , "Vehicle Does Not Creep Backward in “R” Position"
❏ AT- 1 9 7 , "Vehicle Does Not Creep Forward in “D” Position"
4-3.Cruise TestAT- 5 9
Part 1
❏ AT- 1 9 9 , "
Vehicle Cannot Be Started from D1"
❏ AT- 2 0 1 , "A/T Does Not Shift: D1 → D2"
❏ AT- 2 0 3 , "A/T Does Not Shift: D2 → D3"
❏ AT- 2 0 5 , "A/T Does Not Shift: D3 → D4"
❏ AT- 2 0 7 , "A/T Does Not Shift: D4 → D5"
❏ AT- 2 0 9 , "A/T Does Not Lock-up"
❏ AT- 2 1 0 , "A/T Does Not Hold Lock-up Condition"
❏ AT- 2 1 2 , "Lock-up Is Not Released"
❏ AT- 2 1 2 , "Engine Speed Does Not Return to Idle"
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AT-54
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
5. While holding down the foot brake, gradually press down the
accelerator pedal.
6. Quickly read off the stall speed, then quickly remove your foot
from the accelerator pedal.
CAUTION:
Do not hold down the accelerator pedal for more than 5 sec-
onds during this test.
7. Move the selector lever to the “N” position.
8. Cool down the ATF.
CAUTION:
Run the engine at idle for at least 1 minute.
9. Repeat steps 5 through 8 with selector lever in “R” position.
Judgement of Stall Test
O: Stall speed within standard value position
H: Stall speed higher than standard value
L: Stall speed lower than standard value
Stall test standard value positionStall speed
VQ35DE models: 2,650 - 2,950 rpm
VK45DE models: 2,260 - 2,560 rpm
SAT514G
SCIA6788E
Selector lever position
Possible location of malfunction
“D”, “M” “R”
Stall speed HO
Forward brake
Forward one-way clutch
1st one-way clutch
3rd one-way clutch
OH
Reverse brake
LL
Engine and torque converter one-way clutch
HH
Line pressure low
Does not shift-up “D” or “M” position 1 → 2 Slipping in 2nd, 3rd or 4th gear Direct clutch slippage
Does not shift-up “D” or “M” position 2 → 3 Slipping in 3rd, 4th or 5th gear High and low reverse clutch slippage
Does not shift-up “D” or “M” position 3 → 4 Slipping in 4th or 5th gear Input clutch slippage
Does not shift-up “D” or “M” position 4 → 5 Slipping in 5th gear Front brake slippage
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TROUBLE DIAGNOSIS
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LINE PRESSURE TEST
Line Pressure Test Port
Line Pressure Test Procedure
1. Inspect the amount of engine oil and replenish if necessary.
2. Drive the car for about 10 minutes to warm it up so that the ATF reaches in range of 50 to 80°C (122 to
176°F), then inspect the amount of ATF and replenish if necessary.
NOTE:
The A/T fluid temperature rises in range of 50 to 80°C (122 to 176°F) during 10 minutes of driving.
3. Remove the front propeller shaft from vehicle (with AWD models). Refer to PR-5, "
Removal and Installa-
tion" .
4. After warming up remove the oil pressure detection plug and
install the oil pressure gauge [ST2505S001(J-34301-C)].
CAUTION:
When using the oil pressure gauge, be sure to use the O-
ring attached to the oil pressure detection plug.
5. Securely engage the parking brake so that the tires do not turn.
6. Start the engine, then measure the line pressure at both idle and
the stall speed.
CAUTION:
Keep the brake pedal pressed all the way down during
measurement.
When measuring the line pressure at the stall speed,
refer to AT- 5 3 , "
STALL TEST" .
7. After the measurements are complete, install the oil pressure
detection plug and tighten to the specified torque.
SCIA2187E
SCIA5309E
SCIA7463E
: 7.3 N·m (0.74 kg-m, 65 in-lb)SAT493G
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AT-56
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
CAUTION:
Do not reuse O-ring.
Apply ATF to O-ring.
Line Pressure
Judgement of Line Pressure Test
Engine speedLine pressure [kPa (kg/cm
2 , psi)]
“R” position “D”, “M” positions
At idle speed 425 - 465 (4.3 - 4.7, 62 - 67) 379 - 428 (3.9 - 4.4, 55 - 62)
At stall speed 1,605 - 1,950 (16.4 - 19.9, 233 - 283) 1,310 - 1,500 (13.4 - 15.3, 190 - 218)
Judgement Possible cause
Idle speedLow for all positions
(“P”, “R”, “N”, “D”, “M”)Possible causes include malfunctions in the pressure supply system and low oil pump out-
put.
For example
Oil pump wear
Pressure regulator valve or plug sticking or spring fatigue
Oil strainer oil pump pressure regulator valve passage oil leak
Engine idle speed too low
Only low for a specific
positionPossible causes include an oil pressure leak in a passage or device related to the position
after the pressure is distributed by the manual valve.
HighPossible causes include a sensor malfunction or malfunction in the line pressure adjustment
function.
For example
Accelerator pedal position signal malfunction
A/T fluid temperature sensor malfunction
Line pressure solenoid malfunction (sticking in OFF state, filter clog, cut line)
Pressure regulator valve or plug sticking
Stall speedOil pressure does not
rise higher than the oil
pressure for idle.Possible causes include a sensor malfunction or malfunction in the pressure adjustment
function.
For example
Accelerator pedal position signal malfunction
TCM breakdown
Line pressure solenoid malfunction (shorting, sticking in ON state)
Pressure regulator valve or plug sticking
Pilot valve sticking or pilot filter clogged
The pressure rises, but
does not enter the stan-
dard position.Possible causes include malfunctions in the pressure supply system and malfunction in the
pressure adjustment function.
For example
Accelerator pedal position signal malfunction
Line pressure solenoid malfunction (sticking, filter clog)
Pressure regulator valve or plug sticking
Pilot valve sticking or pilot filter clogged
Only low for a specific
positionPossible causes include an oil pressure leak in a passage or device related to the position
after the pressure is distributed by the manual valve.
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TROUBLE DIAGNOSIS
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ROAD TEST
Description
The road test inspects overall performance of the A/T and analyzes possible malfunction causes.
The road test is performed out in the following three stages.
1. Check before engine is started. Refer to AT- 5 7
.
2. Check at idle. Refer to AT- 5 7
.
3. Cruise test
Inspect all the items from Part 1 to Part 3. Refer to AT- 5 9 , AT- 6 1 , AT- 6 1 .
Before beginning the road test, check the test procedure and inspection items.
Test all inspection items until the symptom is uncovered. Diagnose NG items when all road tests are com-
plete.
Check before Engine Is StartedNCS001K8
1. CHECK A/T CHECK INDICATOR LAMP
1. Park vehicle on level surface.
2. Move selector lever to “P” position.
3. Turn ignition switch OFF and wait at least 10 seconds.
4. Turn ignition switch ON. (Do not start engine.)
Does A/T CHECK indicator lamp light up for about 2 seconds?
YES >> 1. Turn ignition switch OFF.
2. Perform self-diagnostics and record all NG items on the AT- 4 8 , "
DIAGNOSTIC WORKSHEET"
. Refer to AT- 9 2 , "SELF-DIAGNOSTIC RESULT MODE" , AT- 1 0 3 , "Diagnostic Procedure with-
out CONSULT-II" .
3. Go to AT- 5 7 , "
Check at Idle" .
NO >> Stop the road test and go to AT- 1 9 0 , "
A/T CHECK Indicator Lamp Does Not Come On" .
Check at IdleNCS001K9
1. CHECK STARTING THE ENGINE
1. Park vehicle on level surface.
2. Move selector lever to “P” or “N” position.
3. Turn ignition switch OFF.
4. Start engine.
Does the engine start?
YES >> GO TO 2.
NO >> Stop the road test and go to AT- 1 9 0 , "
Engine Cannot Be Started in “P” or “N” Position" .
2. CHECK STARTING THE ENGINE
1. Turn ignition switch ON.
2. Move selector lever to “D”, “M” or “R” position.
3. Start engine.
Does the engine start in any positions?
YES >> Stop the road test and go to AT- 1 9 0 , "Engine Cannot Be Started in “P” or “N” Position" .
NO >> GO TO 3.
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AT-60
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
5. CHECK SHIFT-UP D4 → D5
Press down the accelerator pedal about half-way and inspect if the vehicle shifts up (D4 → D5) at the appro-
priate speed. Refer to AT- 6 3 , "
Vehicle Speed at Which Gear Shifting Occurs" .
With CONSULT-II
Read the gear position, throttle degree of opening and vehicle speed. Refer to AT- 9 6 , "
DATA MONITOR
MODE" .
Does the A/T shift-up D4
→ D5 at the correct speed?
YES >> GO TO 6.
NO >> Enter a check mark at AT- 2 0 7 , "
A/T Does Not Shift: D4 → D5" on the AT- 4 8 , "DIAGNOSTIC
WORKSHEET" , then continue the road test.
6. CHECK LOCK-UP
When releasing accelerator pedal (closed throttle position signal: OFF) from D5, check lock-up from D5 to L/U.
Refer to AT- 6 3 , "
Vehicle Speed at Which Gear Shifting Occurs" .
With CONSULT-II
Select “TCC SOLENOID” with the “MAIN SIGNAL” mode for “A/T”. Refer to AT- 9 0 , "
CONSULT-II REFER-
ENCE VALUE" .
Does it lock-up?
YES >> GO TO 7.
NO >> Enter a check mark at AT- 2 0 9 , "
A/T Does Not Lock-up" on the AT- 4 8 , "DIAGNOSTIC WORK-
SHEET" , then continue the road test.
7. CHECK LOCK-UP HOLD
Check hold lock-up.
With CONSULT-II
Select “TCC SOLENOID” with the “MAIN SIGNAL” mode for “A/T”. Refer to AT- 9 0 , "
CONSULT-II REFER-
ENCE VALUE" .
Does it maintain lock-up status?
YES >> GO TO 8.
NO >> Enter a check mark at AT- 2 1 0 , "
A/T Does Not Hold Lock-up Condition" on the AT- 4 8 , "DIAGNOS-
TIC WORKSHEET" , then continue the road test.
8. CHECK LOCK-UP RELEASE
Check lock-up cancellation by depressing brake pedal lightly to decelerate.
With CONSULT-II
Select “TCC SOLENOID” with the “MAIN SIGNAL” mode for A/T. Refer to AT- 9 0 , "
CONSULT-II REFERENCE
VA L U E" .
Does lock-up cancel?
YES >> GO TO 9.
NO >> Enter a check mark at AT- 2 1 2 , "
Lock-up Is Not Released" on the AT- 4 8 , "DIAGNOSTIC WORK-
SHEET" , then continue the road test.
9. CHECK SHIFT-DOWN D5 → D4
Decelerate by pressing lightly on the brake pedal.
With CONSULT-II
Read the gear position and engine speed. Refer to AT- 9 6 , "
DATA MONITOR MODE" .
When the A/T shift-down D5
→ D4, does the engine speed drop smoothly back to idle?
YES >> 1. Stop the vehicle.
2. Go to AT- 6 1 , "
Cruise Test - Part 2" .
NO >> Enter a check mark at AT- 2 1 2 , "
Engine Speed Does Not Return to Idle" on the AT- 4 8 , "DIAG-
NOSTIC WORKSHEET" , then continue the road test. Go to AT- 6 1 , "Cruise Test - Part 2" .
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AT-64
TROUBLE DIAGNOSIS
Revision: 2007 April2007 M35/M45
AW D M OD E LS
At closed throttle, the accelerator opening is less than 1/8 condition. (Closed throttle position signal: OFF)
At half throttle, the accelerator opening is 4/8 of the full opening.
Symptom ChartNCS001KF
The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.
Overhaul and inspection inside the A/T only if A/T fluid condition is NG. Refer to AT- 5 3 , "A/T Fluid Condi-
tion Check" .
Engine model VQ35DE
Throttle positionVehicle speed km/h (MPH)
Lock-up ON Lock-up OFF
Closed throttle 51 - 59 (32 - 37) 48 - 56 (30 - 35)
Half throttle 188 - 196 (117 - 122) 132 - 140 (82 - 87)
No. Item Symptom Condition Diagnostic ItemReference
page
1Shift
ShockLarge shock. (“N” →
“D” position)
Refer to AT-193,
"Large Shock (“N” to
“D” Position)" .ON vehicle1. Engine idle speedEC-83
(for
VQ35DE
engine),
EC-785
(for
VK45DE
engine)
2. Engine speed signalAT- 1 2 4
3. Accelerator pedal position sensorAT- 1 3 2
4. A/T positionAT- 2 2 7
5. A/T fluid temperature sensorAT- 1 3 5
6. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2,
AT- 1 5 1
7. CAN communication lineAT- 1 0 5
8. A/T fluid level and stateAT- 5 3
9. Line pressure testAT- 5 5
10. Control valve with TCMAT- 2 3 6
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17, "Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
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30
Slips/Will
Not
EngageNo shock at all or the
clutch slips when
vehicle changes
speed D
4 → D5 or
M
4 → M5 .ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT-140
3. ATF pressure switch 1 and front brake solenoid valveAT-172,
AT-151
4. ATF pressure switch 5 and direct clutch solenoid valveAT-176,
AT-155
5. CAN communication lineAT-105
6. Line pressure testAT- 5 5
7. Control valve with TCMAT-236
OFF vehicle8. Torque converterAT-301
9. Oil pump assemblyAT-322
10. Front brake (brake band)AT-301
11. Input clutchAT-327
12. Gear systemAT-281
13. High and low reverse clutchAT-339
31When you press the
accelerator pedal and
shift speed D5 → D4
or M
5 → M4 the
engine idles or the A/
T slips.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT-140
3. ATF pressure switch 1 and front brake solenoid valveAT-172,
AT-151
4. ATF pressure switch 5 and direct clutch solenoid valveAT-176,
AT-155
5. CAN communication lineAT-105
6. Line pressure testAT- 5 5
7. Control valve with TCMAT-236
OFF vehicle8. Torque converterAT-301
9. Oil pump assemblyAT-322
10. Input clutchAT-327
11. Gear systemAT-281
12. High and low reverse clutchAT-339
13. Direct clutchAT-341
No. Item Symptom Condition Diagnostic ItemReference
page
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Revision: 2007 April2007 M35/M45
32
Slips/Will
Not
EngageWhen you press the
accelerator pedal and
shift speed D4 → D3
or M
4 → M3 the
engine idles or the A/
T slips.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT- 1 4 0
3. ATF pressure switch 3 and input clutch solenoid valveAT- 1 7 4,
AT- 1 4 7
4. ATF pressure switch 1 and front brake solenoid valveAT- 1 7 2,
AT- 1 5 1
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Torque converterAT- 3 0 1
9. Oil pump assemblyAT- 3 2 2
10. 3rd one-way clutchAT- 3 2 5
11. Gear systemAT- 2 8 1
12. High and low reverse clutchAT- 3 3 9
13. Forward one-way clutch (Parts behind drum support is
impossible to perform inspection by disassembly. Refer to
AT-17, "
Cross-Sectional View (VQ35DE Models for 2WD)" ,
AT-18, "
Cross-Sectional View (VK45DE Models for 2WD)" or
AT-19, "
Cross-Sectional View (AWD Models)" .)AT- 3 0 1
14. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
33When you press the
accelerator pedal and
shift speed D3 → D2
or M
3 → M2 the
engine idles or the A/
T slips.ON vehicle1. A/T fluid level and stateAT- 5 3
2. Vehicle speed sensor·A/T and vehicle speed sensor·MTRAT- 11 9,
AT- 1 4 0
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT- 1 7 8,
AT- 1 5 9
4. ATF pressure switch 5 and direct clutch solenoid valveAT- 1 7 6,
AT- 1 5 5
5. CAN communication lineAT- 1 0 5
6. Line pressure testAT- 5 5
7. Control valve with TCMAT- 2 3 6
OFF vehicle8. Torque converterAT- 3 0 1
9. Oil pump assemblyAT- 3 2 2
10. 3rd one-way clutch AT- 3 2 5
11. Gear system
12. Direct clutchAT- 3 4 1
13. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT-17,
"Cross-Sectional View (VQ35DE Models for 2WD)" , AT-18,
"Cross-Sectional View (VK45DE Models for 2WD)" o r AT-19,
"Cross-Sectional View (AWD Models)" .)AT- 3 0 1
No. Item Symptom Condition Diagnostic ItemReference
page