INFINITI QX56 2006 Factory Service Manual

AT-56
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
4. CHECK “N” POSITION FUNCTIONS
1. Start the engine.
2. Move selector lever to “N ” position.
3. Release the parking brake.
Does vehicle move forward or backward?
YES >> Enter a check mark at “In “N” Position Vehicle Moves” on the diagnostics worksheet, then con-
tinue the road test.
NO >> GO TO 5.
5. CHECK SHIFT SHOCK
1. Engage the brake.
2. Move selector lever to “D ” position.
When the transmission is shifted from
“N” to “D”, is there an excessive shock?
YES >> Enter a check mark at “Large Shock ("N" to "D" Position) on the diagnostics worksheet, then con- tinue the road test.
NO >> GO TO 6.
6. CHECK “R” POSITION FUNCTIONS
1. Engage the brake.
2. Move selector lever to “R ” position.
3. Release the brake for 4 to 5 seconds.
Does the vehicle creep backward?
YES >> GO TO 7.
NO >> Enter a check mark at “Vehicle Does Not Creep Backward In "R" Position ” on the diagnostics
worksheet, then continue the road test.
7. CHECK “D” POSITION FUNCTIONS
Inspect whether the vehicle creeps forward when the transmission is put into the “D” position.
Does the vehicle creep forward in the
“D” positions?
YES >> Go to AT- 5 6 , "Cruise Test - Part 1" , AT- 5 8 , "Cruise Test - Part 2" , and AT- 5 9 , "Cruise Test - Part
3" .
NO >> Enter a check mark at “Vehicle Does Not Creep Forward in "D" Position ” on the diagnostics work-
sheet, then continue the road test.
Cruise Test - Part 1ECS00CEH
1. CHECK STARTING OUT FROM D1
1. Drive the vehicle for about 10 minutes to warm up the engine oil and ATF. Appropriate temperature for the ATF: 50 - 80° C (122 - 176°F)
2. Park the vehicle on a level surface.
3. Move selector lever to “P ” position.
4. Start the engine.
5. Move selector lever to “D ” position.
6. Press the accelerator pedal about half way down to accelerate the vehicle.
With CONSULT-II
Read off the gear positions.
Starts from D1?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle Cannot be Started From D1 ” on the diagnostics worksheet, then
continue the road test.

TROUBLE DIAGNOSISAT-57
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Revision: November 2009 2006 QX56
2. CHECK SHIFT-UP D1 → D2
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D1 → D2) at the appropri-
ate speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Enter a check mark at “A/T Does Not Shift: D1 → D2 ” on the diagnostics worksheet, then continue
the road test.
3. CHECK SHIFT-UP D2 → D3
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D2 → D3) at the appropri-
ate speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D2
→ D3 at the correct speed?
YES >> GO TO 4.
NO >> Enter a check mark at “A/T Does Not Shift: D2 → D3 ” on the diagnostics worksheet, then continue
the road test.
4. CHECK SHIFT-UP D3 → D4
Press down the accelerator pedal about half way and inspect if the vehicle shifts up (D3 → D4) at the appropri-
ate speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D3
→ D4 at the correct speed?
YES >> GO TO 5.
NO >> Enter a check mark at “A/T Does Not Shift: D3 → D4 ” on the diagnostics worksheet, then continue
the road test.
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 appropri-
ate speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle degree of opening, and vehicle speed.
Does the A/T shift-up D4
→ D5 at the correct speed?
YES >> GO TO 6.
NO >> Enter a check mark at “A/T Does Not Shift: D4 → D5 ” on the diagnostics worksheet, then continue
the road test.

AT-58
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
6. CHECK LOCK-UP
When releasing accelerator pedal from D5, check lock-up from D5 to L/U.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Select “TCC SOLENOID 0.00A ” with the “MAIN SIGNAL ” mode for A/T.
Does it lock-up?
YES >> GO TO 7.
NO >> Enter a check mark at “A/T Does Not Perform Lock-up” on the diagnostics worksheet, then con-
tinue the road test.
7. CHECK LOCK-UP HOLD
Does it maintain lock-up status?
YES >> GO TO 8.
NO >> Enter a check mark at “A/T Does Not Hold Lock-up Condition ” on the diagnostics 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 0.00A ” with the “MAIN SIGNAL ” mode for A/T.
Does lock-up cancel?
YES >> GO TO 9.
NO >> Enter a check mark at “Lock-up Is Not Released” on the diagnostics worksheet, 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.
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 Cruise test - Part 2 (Refer to AT- 5 8
).
NO >> Enter a check mark at “Engine Speed Does Not Return to Idle” on the diagnostics worksheet, then continue the road test. Go to Cruise test - Part 2 (Refer to AT- 5 8
).
Cruise Test - Part 2ECS00CEI
1. CHECK STARTING FROM D1
1. Move selector lever the “D ” position.
2. Accelerate at half throttle.
With CONSULT-II
Read the gear position.
Does it start from D1?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle Cannot Be Started From D1 ” on the diagnostics worksheet, then
continue the road test.

TROUBLE DIAGNOSISAT-59
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2. CHECK SHIFT-UP D1 → D2
Press the accelerator pedal down all the way and inspect whether or not the transmission shifts up (D1 → D2)
at the correct speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle position and vehicle speed.
Does the A/T shift-up D1
→ D2 at the correct speed?
YES >> GO TO 3.
NO >> Enter a check mark at “Vehicle Does Not Shift: D1 → D2 ” on the diagnostics worksheet, then con-
tinue the road test.
3. CHECK SHIFT-UP D2 → D3
Press the accelerator pedal down all the way and inspect whether or not the transmission shifts up (D2 → D3)
at the correct speed.

Refer to AT- 6 0 , "Vehicle Speed When Shifting Gears" .
With CONSULT-II
Read the gear position, throttle position and vehicle speed.
Does the A/T shift-up D2
→ D3 at the correct speed?
YES >> GO TO 4.
NO >> Enter a check mark at “Vehicle Does Not Shift: D2 → D3 ” on the diagnostics worksheet, then con-
tinue the road test.
4. CHECK SHIFT-UP D3 → D4 AND ENGINE BRAKE
When the transmission changes speed D3 → D4, return the accelerator pedal.
Does the A/T shift-up D3
→ D4 and apply the engine brake?
YES >> 1. Stop the vehicle.
2. See AT- 5 9 , "
Cruise Test - Part 3" .
NO >> Enter a check mark at “Vehicle Does Not Shift: D3 → D4 ” on the diagnostics worksheet, then con-
tinue the road test.
Cruise Test - Part 3ECS00CEJ
1. CHECK SHIFT-DOWN
During D
5 driving, move gear selector from D → 4 → 3 → 2 → 1.
With CONSULT-II
Read the gear position.
Is downshifting correctly performed?
YES >> GO TO 2.
NO >> Enter a check mark at “Vehicle does not shift ” at the corresponding position (5th → 4th, 4th → 3rd,
3rd → 2nd, 2nd → 1st) on the diagnostics worksheet, then continue the road test.
2. CHECK ENGINE BRAKE
Does engine braking effectively reduce speed in 1
1 position?
YES >> 1. Stop the vehicle. 2. Carry out the self-diagnostics. Refer to AT- 8 6 , "
SELF-DIAGNOSTIC RESULT MODE" .
NO >> Enter a check mark at “Vehicle Does Not Decelerate By Engine Brake ” on the diagnostics work-
sheet, then continue trouble diagnosis.

AT-60
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
Vehicle Speed When Shifting GearsECS00CEK
NORMAL MODE

At half throttle, the accelerator opening is 4/8 of the full opening.
TOW MODE

At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed When Performing and Releasing Complete Lock-up ECS00CEL

At closed throttle, the accelerator opening is less than 1/8 condition.

At half throttle, the accelerator opening is 4/8 of the full opening.
Vehicle Speed When Performing and Releasing Slip Lock-upECS00CEM

At closed throttle, the accelerator opening is less than 1/8 condition.
Final
gear
ratio
Throttle position Vehicle speed km/h (MPH)
D
1 → D2D2 → D3D3 → D4D4 → D5D5 → D4D4 → D3D3 → D2D2 → D1
2.937 Full throttle
70 - 74
(44 - 46) 112 - 120
(70 - 75) 176 - 186
(110 - 116) 249 - 259
(155 - 161) 245 - 255
(152 - 159) 166 - 176
(103 - 110) 100 - 108
(62 - 67) 43 - 47
(27 - 30)
Half throttle 46 - 50
(28 - 31) 74 - 82
(46 - 51) 103 - 113
(64 - 70) 135 - 145
(84 - 90) 109 - 119
(68 - 74) 69 - 79
(43 - 49) 44 - 52
(27 - 32) 11 - 1 5
(7 - 10)
3.357 Full throttle
61 - 65
(38 - 41) 97 - 105
(61 - 66) 153 - 163
(95 - 102) 236 - 246
(147 - 153) 232 - 242
(144 - 151) 143 - 153
(89 - 95) 87 - 95
(54 - 59) 43 - 47
(27 - 29)
Half throttle 41 - 45
(26 - 28) 66 - 74
(41 - 46) 89 - 99
(56 - 62) 117 - 127
(73 - 79) 95 - 105
(59 - 65) 59 - 69
(37 - 43) 38 - 46
(24 - 29) 11 - 1 5
(7 - 10)
Final
gear
ratio Throttle position Vehicle speed km/h (MPH)
D
1 → D2D2 → D3D3 → D4D4 → D5D5 → D4D4 → D3D3 → D2D2 → D1
2.937 Full throttle
70 - 74
(44 - 46) 112 - 120
(70 - 75) 176 - 186
(110 - 116) 249 - 259
(155 - 161) 245 - 255
(152 - 159) 166 - 176
(103 - 110) 100 - 108
(62 - 67) 43 - 47
(27 - 30)
Half throttle 50 - 54
(31 - 34) 81 - 89
(50 - 55) 113 - 123
(70 - 76) 135 - 145
(84 - 90) 109 - 119
(68 - 74) 68 - 78
(42 - 48) 44 - 52
(27 - 32) 11 - 1 5
(7 - 10)
3.357 Full throttle
61 - 65
(38 - 41) 97 - 105
(61 - 66) 153 - 163
(95 - 102) 236 - 246
(147 - 153) 232 - 242
(144 - 151) 143 - 153
(89 - 95) 87 - 95
(54 - 59) 43 - 47
(27 - 29)
Half throttle 43 - 47
(27 - 29) 72 - 80
(45 - 50) 98 - 108
(61 - 67) 117 - 127
(73 - 79) 95 - 105
(59 - 65) 59 - 69
(37 - 43) 37 - 45
(23 - 28) 11 - 1 5
(7 - 10)
Final
gear ratio Throttle position Vehicle speed km/h (MPH)
Lock-up “ON ” Lock-up “OFF ”
2.937 Closed throttle
74 - 82 (46 - 51) 71 - 79 (45 - 49)
Half throttle 188 - 196 (117 - 122) 136 - 144 (85 - 90)
3.357 Closed throttle
65 - 73 (41 - 46) 62 - 70 (39 - 44)
Half throttle 168 - 176 (105 - 110) 118 - 126 (74 - 79)
Final
gear
ratioThrottle position Gear position
Vehicle speed km/h (MPH)
Slip lock-up “ON ” Slip lock-up “OFF ”
2.937 Closed throttle 4th
52 - 60 (33 - 38) 49 - 57 (31 - 36)
5th 52 - 60 (33 - 38) 49 - 57 (31 - 36)
3.357 Closed throttle 4th
46 - 54 (29 - 34) 43 - 51 (27 - 32)
5th 46 - 54 (29 - 34) 43 - 51 (27 - 32)

TROUBLE DIAGNOSISAT-61
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Revision: November 2009 2006 QX56
Symptom ChartECS00CEN

The diagnostics item numbers show the sequence for inspection. Inspect in order from item 1.

Overhaul and inspect inside the A/T only if A/T fluid condition is NG. Refer to AT- 5 1 , "A/T FLUID
CHECK" .
No. Items Symptom Condition Diagnostic ItemReference
page
1
Shift
Shock Large shock. (
“N ” → “
D ” position)
Refer to AT-182,
"Large Shock (“N” to
“D” Position)" . ON vehicle 1. Engine idle speed
EC-76
2. Engine speed signalAT- 11 6
3. Accelerator pedal position sensorAT-124
4. Control cable adjustmentAT-227
5. ATF temperature sensorAT-127
6. ATF pressure switch 1 and front brake solenoid valveAT-159,
AT-143
7. CAN communication line AT- 9 6
8. Fluid level and stateAT- 5 1
9. Line pressure testAT- 5 2
10. Control valve with TCMAT-230
OFF vehicle11. Forward brake (Parts behind drum support is impossible
to perform inspection by disassembly. Refer to AT- 1 7 , AT- 1 8
.) AT-264
2Shock is too large
when changing D1 →

D
2 . ON vehicle1. Accelerator pedal position sensor
AT-124
2. Control cable adjustmentAT-227
3. ATF pressure switch 5 and direct clutch solenoid valveAT-163,
AT-147
4. CAN communication line AT- 9 6
5. Engine speed signalAT- 11 6
6. Turbine revolution sensorAT-109
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
8. Fluid level and state AT- 5 1
9. Control valve with TCMAT-230
OFF vehicle 10. Direct clutch AT-298
3Shock is too large
when changing D2 →

D
3 . ON vehicle1. Accelerator pedal position sensor
AT-124
2. Control cable adjustmentAT-227
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valveAT-165,
AT-151
4. CAN communication line AT- 9 6
5. Engine speed signalAT- 11 6
6. Turbine revolution sensorAT-109
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
8. Fluid level and state AT- 5 1
9. Control valve with TCMAT-230
OFF vehicle 10. High and low reverse clutch AT-296

AT-62
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
4
Shift
Shock Shock is too large
when changing D3
→
D
4 . ON vehicle1. Accelerator pedal position sensor
AT- 1 2 4
2. Control cable adjustmentAT- 2 2 7
3. ATF pressure switch 3 and input clutch solenoid valveAT- 1 6 1,
AT- 1 3 9
4. CAN communication line AT- 9 6
5. Engine speed signalAT- 11 6
6. Turbine revolution sensorAT- 1 0 9
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
8. Fluid level and state AT- 5 1
9. Control valve with TCMAT- 2 3 0
OFF vehicle 10. Input clutch AT- 2 8 6
5Shock is too large
when changing D4
→
D
5 . ON vehicle1. Accelerator pedal position sensor
AT- 1 2 4
2. Control cable adjustmentAT- 2 2 7
3. ATF pressure switch 1 and front brake solenoid valveAT- 1 5 9,
AT- 1 4 3

4. CAN communication line AT- 9 6
5. Engine speed signalAT- 11 6
6. Turbine revolution sensorAT- 1 0 9
7. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
8. Fluid level and state AT- 5 1
9. Control valve with TCMAT- 2 3 0
OFF vehicle10. Front brake (brake band)
AT- 2 5 011. Input clutchAT- 2 8 6
6Shock is too large for
downshift when accel-
erator pedal is
pressed. ON vehicle1. Accelerator pedal position sensor
AT- 1 2 4
2. Control cable adjustmentAT- 2 2 7
3. CAN communication line AT- 9 6
4. Engine speed signalAT- 11 6
5. Turbine revolution sensorAT- 1 0 9
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
7. Fluid level and state AT- 5 1
8. Control valve with TCMAT- 2 3 0
OFF vehicle9. Front brake (brake band)
AT- 2 5 0
10. Input clutchAT- 2 8 6
11. High and low reverse clutchAT- 2 9 6AT-
296
12. Direct clutch
AT- 2 9 8
No. ItemsSymptom Condition Diagnostic ItemReference
page

TROUBLE DIAGNOSISAT-63
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7
Shift
Shock Shock is too large for
upshift when acceler-
ator pedal is released.
ON vehicle1. Accelerator pedal position sensor
AT-124
2. Control cable adjustmentAT-227
3. Engine speed signal AT- 11 6
4. CAN communication line AT- 9 6
5. Turbine revolution sensorAT-109
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
7. Fluid level and state AT- 5 1
8. Control valve with TCMAT-230
OFF vehicle9. Front brake (brake band)
AT-25010. Input clutchAT-286
11. High and low reverse clutchAT-296
12. Direct clutchAT-298
8Shock is too large for
lock-up. ON vehicle1. Accelerator pedal position sensor
AT-124
2. Control cable adjustmentAT-227
3. Engine speed signal AT- 11 6
4. CAN communication line AT- 9 6
5. Turbine revolution sensorAT-109
6. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
7. Torque converter clutch solenoid valve AT- 11 8
8. Fluid level and state AT- 5 1
9. Control valve with TCMAT-230
OFF vehicle 10. Torque converter AT-264
9Shock is too large
during engine brake. ON vehicle
1. Accelerator pedal position sensor
AT-124
2. Control cable adjustmentAT-227
3. CAN communication line AT- 9 6
4. Fluid level and stateAT- 5 1
5. Control valve with TCMAT-230
OFF vehicle6. Front brake (brake band)
AT-2507. Input clutchAT-286
8. High and low reverse clutchAT-296
9. Direct clutchAT-298
No. ItemsSymptom Condition Diagnostic ItemReference
page

AT-64
TROUBLE DIAGNOSIS
Revision: November 20092006 QX56
10
No Up
Shift Gear does not change
from D
1
→ D2 .
Refer to AT-194, "
A/T
Does Not Shift: D1 →
D2" . ON vehicle1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 6 3,
AT- 1 4 7
4. Line pressure test AT- 5 2
5. CAN communication lineAT- 9 6
6. Control valve with TCMAT- 2 3 0
OFF vehicle 7. Direct clutch AT- 2 9 8
11Gear does not change
from D2
→ D3 .
Refer to AT-196, "
A/T
Does Not Shift: D2 →
D3" . ON vehicle1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT- 1 6 5,
AT- 1 5 1
4. Line pressure test AT- 5 2
5. CAN communication lineAT- 9 6
6. Control valve with TCMAT- 2 3 0
OFF vehicle 7. High and low reverse clutch AT- 2 9 6
12Gear does not change
from D
3
→ D4 .
Refer to AT-198, "
A/T
Does Not Shift: D3 →
D4" . ON vehicle1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 3 and input clutch solenoid valve AT- 1 6 1,
AT- 1 3 9
4. ATF pressure switch 1 and front brake solenoid valve AT- 1 5 9,
AT- 1 4 3
5. Line pressure test AT- 5 2
6. CAN communication lineAT- 9 6
7. Control valve with TCMAT- 2 3 0
OFF vehicle 8. Input clutch AT- 2 8 6
13Gear does not change
from D
4
→ D5 .
Refer to AT-201, "
A/T
Does Not Shift: D4 →
D5" . ON vehicle1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT- 1 3 2
3. ATF pressure switch 1 and front brake solenoid valve AT- 1 5 9,
AT- 1 4 3
4. ATF pressure switch 5 and direct clutch solenoid valve AT- 1 6 3,
AT- 1 4 7
5. Turbine revolution sensor AT- 1 0 9
6. Line pressure test AT- 5 2
7. CAN communication lineAT- 9 6
8. Control valve with TCMAT- 2 3 0
OFF vehicle9. Front brake (brake band)
AT- 2 6 410. Input clutchAT- 2 8 6
No. ItemsSymptom Condition Diagnostic ItemReference
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TROUBLE DIAGNOSISAT-65
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14
No Down
Shift In “
D” or "4" range,
does not downshift to
4th gear.
Refer to AT-209, "A/T
Does Not Shift: 5th
gear → 4th gear" .ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132

3. ATF pressure switch 1 and front brake solenoid valve AT-159
,
AT-143
4. ATF pressure switch 5 and direct clutch solenoid valve AT-163,
AT-147
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT-230
OFF vehicle8. Front brake (brake band)
AT-2649. Input clutchAT-286
15In “
D” or "3" range,
does not downshift to
3rd gear.
Refer to AT-212, "A/T
Does Not Shift: 4th
gear → 3rd gear" . ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
3. ATF pressure switch 3 and input clutch solenoid valve AT-161,
AT-139
4. ATF pressure switch 1 and front brake solenoid valve AT-159,
AT-143
5. CAN communication line AT- 9 6
6. Line pressure testAT- 5 2
7. Control valve with TCMAT-230
OFF vehicle 8. Input clutch AT-286
16In “
D” or "2" range,
does not downshift to
2nd gear.
Refer to AT-213, "A/T
Does Not Shift: 3rd
gear → 2nd gear" .ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132

3. ATF pressure switch 6, high and low reverse clutch sole-
noid valve AT-165
,
AT-151
4. CAN communication line AT- 9 6
5. Line pressure testAT- 5 2
6. Control valve with TCMAT-230
OFF vehicle 7. High and low reverse clutch AT-296
17In “
D” or "1" range,
does not downshift to
1st gear.
Refer to AT-215, "A/T
Does Not Shift: 2nd
gear → 1st gear" . ON vehicle 1. Fluid level and state
AT- 5 1
2. Vehicle speed sensor A/T and vehicle speed sensor MTRAT- 111,
AT-132
3. ATF pressure switch 5 and direct clutch solenoid valve AT-163,
AT-147
4. CAN communication line AT- 9 6
5. Line pressure testAT- 5 2
6. Control valve with TCMAT-230
OFF vehicle 7. Direct clutch AT-298
No. ItemsSymptom Condition Diagnostic ItemReference
page