brake
pressure
[Pressure at
REV]

Primary
pressure
[Pressure at
PRI]

Line pressure Torque
[Pressure at converter
PL]
[Pressure at
DR]

P

0 (0)

0 (0)

0.1 1.5
(15 218)

0.5 1.8
(73 261)

0.4 0.7
(58 102)

R

0 (0)

0.2 1.5 (29
218)

0.1 1.5
(15 218)

0.5 1.8
(73 261)

0.4 0.7
(58 102)

N

0 (0)

0 (0)

0.1 1.5
(15 218)

0.5 1.8
(73 261)

0.4 0.7
(58 102)

D

0.2 1.5
(29 218)

0 (0)

0.1 1.5
(15 218)

0.5 1.8
(73 261)

0.4 0.7
(58 102)

Idling

Hydraulic pressure test diagnosis table
Symptom

Faulty part

Hydraulic pressure is high at all
measuring points.

Incorrect measuring method

Hydraulic pressure is low at all measuring Malfunction of oil pump
points.
Clogged oil strainer
Clogged oil cooler
Malfunction in valve body assembly
Improper installation of valve body assembly
Only forward clutch pressure is abnormal. Malfunction in valve body assembly
Improper installation of valve body assembly
Only reverse brake pressure is abnormal. Malfunction in valve body assembly
Improper installation of valve body assembly
Only primary pressure is abnormal

Malfunction in valve body assembly
Improper installation of valve body assembly

Only line pressure is abnormal.

Malfunction in valve body assembly
Improper installation of valve body assembly

Only torque converter output pressure is
abnormal

Malfunction in valve body assembly
Improper installation of valve body assembly
Malfunction of torque converter

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Attached sheet 11 (1/2)

HYDRAULIC PRESSURE TEST
Required Special Tools:
• MB992744: Vehicle communication interface-Lite
(V.C.I.-Lite)
• MB992745: V.C.I.-Lite main harness A
• MB992747: V.C.I.-Lite USB cable short
• MB992748: V.C.I.-Lite USB cable long

CAUTION

This test must be performed with the transmission fluid
temperature within the range of 70 to 80°C (158 to 176°F).
1. Check the engine oil level, and add if necessary.
2. Warm up the engine, and then perform test drive for
approximately 10 minutes.
3. Check the transmission fluid for leaks, level and
contamination. Then top up or change if necessary.
4. Operate the parking brake securely, and then chock the
wheels.
5. Connect the scan tool (M.U.T.-IIISE), and then start the
engine.

WARNING
For safety, operators must not stand in front of and at
the rear of the vehicle during this test.
CAUTION

During this test, leave the brake pedal depressed fully.
6. Use the scan tool (M.U.T.-IIISE) (data list item No. 21:
Secondary pressure) to measure the secondary pressure by
observing the conditions listed in the standard hydraulic
pressure table.
Standard hydraulic pressure table
Measuring conditions

Standard hydraulic pressure MPa (psi)

Selector lever position

Engine speed

Secondary pressure [Pressure at SEC]

P

Idling

1.0 - 1.2 (145 - 174)

R

1.1 - 1.5 (160 - 218)

N

1.0 - 1.2 (145 - 174)

D

1.1 - 1.5 (160 - 218)

7. Stop the engine.
8. If not within the standard value, take necessary steps
according to the hydraulic pressure test diagnosis table.

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Attached sheet 11 (2/2)

Hydraulic pressure test diagnosis table
Judgement result
During engine
idling

Probable cause

Low at all ranges (P, R, N, The hydraulic pressure
D)
delivery system or the oil
pump may be faulty

Remedy
• Worn oil pump
• Damaged oil pump chain
and sprocket

Replace the transaxle
assembly
Replace the valve body
assembly

• Defective pressure
regulator valve, or
deteriorated spring

• Leaks in the hydraulic
Replace the transaxle
pressure circuit ranging
assembly
from the oil strainer via the
oil pump to the pressure
regulator valve
• The engine idling speed is Check the engine
system, and repair or
low
replace if necessary
Low at certain range(s)
only

Oil leaks may be present in the device or circuit relating to that Replace the transaxle
assembly
range

High

Sensor(s) or the pressure
adjusting function may be
faulty

• Malfunction of the
Check the accelerator
accelerator pedal position pedal position sensor,
sensor
and repair or replace if
necessary
• Malfunction of the oil
pressure sensor

Replace the valve body
assembly

• Malfunction of the line
pressure solenoid valve
(stuck OFF, open circuit or
short circuit)
• Malfunction of the
pressure regulator valve

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Attached sheet 12 (1/3)

CVT
DIAGNOSIS

TROUBLE SYMPTOM DIAGNOSIS CHART

M1231220500070

Diagnose the system by referring to the trouble
symptom chart and the possible cause chart. Then
check, repair or replace if necessary.
Trouble symptom chart
NOTE: Diagnose the system in the order of "Possible cause No.".
Trouble symptom

Possible cause No.

Select
shock

The select shock is large when the selector
lever position is shifted from "N" to "D".

1 o 5 o 12 o 7 o 2 o 3 o 15 o 8 o 16 o 17

The select shock is large when the selector
lever position is shifted from "N" to "R".

1 o 5 o 12 o 7 o 2 o 3 o 15 o 8 o 16 o 17

The torque converter lock-up shock is large.

5 o 1 o 7 o 2 o 16 o 15 o 17

4 →

Does not The vehicle does not start at the D range.
slip or not
be
The vehicle does not start at the R range.
engaged

2 o 5 o 7 o 3 o 4 o 9 o 10 o 11 o 1 o 12
o 13 o 14 o 6 o 16 o 17

Lock-up clutch is not engaged.

2 o 3 o 1 o 9 o 10 o 15 o 7 o 4 o 8 o 12
o 11 o 13 o 14 o 16 o 17

Lock-up clutch is disengaged.

2 o 3 o 1 o 9 o 10 o 15 o 7 o 4 o 8 o 12
o 13 o 11 o 14 o 16 o 17

Lock-up clutch is not disengaged.

2 o 3 o 1 o 9 o 10 o 15 o 7 o 4 o 16 o 17

2 o 5 o 7 o 3 o 4 o 9 o 10 o 11 o 1 o 12
o 13 o 14 o 6 o 16 o 17

Cannot be driven at D range, or extremely poor 2 o 3 o 4 o 1 o 7 o 8 o 5 o 9 o 10 o 11 o
acceleration
13 o 14 o 12 o 6 o 16 o 17
Cannot be driven at R range, or extremely poor 2 o 3 o 4 o 1 o 7 o 8 o 5 o 9 o 10 o 11 o
acceleration
13 o 14 o 12 o 6 o 16 o 17
Slips occurs when the lock-up clutch is
engaged

4/21/2023

2 o 3 o 1 o 9 o 10 o 15 o 7 o 4 o 8 o 12
o 11 o 13 o 14 o 16 o 17

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Attached sheet 12 (2/3)
CVT
DIAGNOSIS

Trouble symptom

Possible cause No.

Others

2 o 3 o 1 o 8 o 7 o 4 o 5 o 9 o 10 o 11 o
12 o 13 o 14 o 6 o 16 o 17

The vehicle does not creep.

The vehicle can be driven at any ranges. 2 o 3 o 8 o 4 o 5 o 9 o 10 o 11 o 1 o 12
o 13 o 14 o 6 o 16 o 17
5 → 16 → 17
The vehicle cannot be driven at the D range.

2 o 3 o 8 o 4 o 5 o 9 o 10 o 11 o 1 o 12
o 13 o 14 o 6 o 16 o 17

The vehicle cannot be driven at the R range.

2 o 3 o 8 o 4 o 5 o 9 o 10 o 11 o 1 o 12
o 13 o 14 o 6 o 16 o 17

Juddering occurs when the lock-up clutch is
engaged

2 o 1 o 9 o 10 o 11 o 7 o 15 o 16 o 17

Abnormal noise occurs at the D range.

2 o 1 o 7 o 16 o 17

Abnormal noise occurs at the R range.

2 o 1 o 7 o 16 o 17

Abnormal noise occurs at the N range.

2 o 1 o 7 o 16 o 17

The engine brake does not work.

2 o 5 o 7 o 9 o 10 o 11 o 3 o 1 o 16 o 17

The maximum speed is low.

2 o 3 o 1 o 7 o 4 o 9 o 10 o 11 o 13 o 14
o 16 o 15 o 17

4 →

The vehicle cannot be stationary at P range.
8 o 5 o 17
Or the parking mechanism cannot be released
when the selector lever is moved to another
range.
Drive the vehicle at P range.

8 o 2 o 5 o 16 o 17

Drive the vehicle at N range.

8 o 2 o 5 o 16 o 17

The engine stalls.

2 o 1 o 9 o 10 o 15 o 7 o 4 o 13 o 14 o
16 o 17

The engine stalls when the selector lever is
shifted from the N range to the D or R range.

2 o 1 o 9 o 10 o 15 o 7 o 16 o 17

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Attached sheet 12 (3/3)

CVT
DIAGNOSIS

Possible cause chart
Possible Probable cause
cause No.

Remedy

1

Malfunction of the engine system

Check the engine system, and repair or
replace if necessary.

2

Improper transmission fluid level

Check the transmission fluid, and repair or
replace if necessary. (Refer to P.23A-170)

3

Not within the standard value of the line
pressure

Check the hydraulic system, and repair or
replace if necessary. (Refer to P.23A-34)

Malfunction of torque converter

Check the torque converter, and repair or
replace if necessary. (Refer to P.23A-33)

5

Malfunction of transaxle control cable

Check the transaxle control cable, and repair
or replace if necessary. (Refer to P.23A-174)

6

Malfunction of TCM power supply system