TROUBLE SYMPTOM DIAGNOSIS CHART


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 Checks should be carried out in the sequence of (A) and (B) in "possible cause No." column. Check items listed in the (A) column, and then items listed in the (B) column.
Trouble symptom
Possible cause No.
(A)
(B)
Poor driveability
Driving off is impossible due to too high engine speed at the R, D, Ds, B or L range.
1, 2, 3, 4, 5, 6, 8, 9, 13, 15, 16, 18, 19, 21,
22 (at D, Ds, B, L range),
24 (at R range), 26, 27, 28, 29
11, 17
Driving off is impossible as then engine stalls at the R, D, Ds, B or L range.
4, 5, 6, 8, 9, 11, 12, 13, 18, 25, 26, 27, 28, 29, 30
17
Poor acceleration at the R, D, Ds, B or L range.
1, 5, 8, 9, 10, 12, 13, 15, 16, 17, 18, 20,
22 (at D, Ds, B, L range),
24 (at R range)
3, 6, 11, 14
The engine speed rises suddenly while the vehicle is being driven at the R, D, Ds, B or L range.
2, 3, 12, 13, 15, 16, 18, 19, 21,
22 (at D, Ds, B, L range),
23 (at D, Ds, B, L range),
24 (at R range)
11
Engine braking becomes effective suddenly while the vehicle is being driven at the R or D range.
1, 3, 12, 13, 15, 16, 18,
22 (at D range),
23 (at D range),
24 (at R range)
-
Shifting fault
Auxiliary gearbox slips when the transmission is shifted from 1st to 2nd gear range (engine revving).
3, 13, 15, 18, 19, 22, 23
1
Engine braking does not become effective at the B or L range.
3, 4, 5, 6, 8, 9, 13, 14, 16, 18, 20, 22, 23
12, 19, 21
Does not shift at the Ds range.
<6 position type>
5, 6, 7, 8, 9, 10, 12, 13
-
The engine stalls immediately before the vehicle decelerates and then stops completely at the D, Ds, B or L range.
10, 14, 18, 20
-
The torque converter is not locked-up due to slips while the vehicle is being driven at the D range.
5, 6, 8, 9, 10, 12, 13, 14, 17, 18, 20
11
Shift shock/vibration/abnormal noise
Harsh shock occurs during driving off at R, D, Ds, B or L range.
3, 13, 14, 18, 21,
22 (at D, Ds, B, L range), 24 (at R range)
11, 26, 27, 28, 29
The shift shock is large when auxiliary gearbox shifting from 1st to 2nd.
3, 15, 16, 18, 22, 23
1, 5
The torque converter lock-up shock is large while the vehicle is being driven at the D, Ds, B or L range.
5, 14, 18, 20
-
The select shock is large when the selector lever position is shifted from "N" to "D", and "N" to "R".
1, 3, 6, 8, 9, 13, 14, 15, 16, 17, 18,
22 (at N → D),
24 (at N → R)
5
Harsh shift shock during shifting from "D" to "B/L" range while the vehicle is being driven.
16, 18, 22, 23
-
Vibration occurs while the vehicle is being driven at the R, D, Ds, B or L range.
1, 2, 3, 5, 10, 14, 15, 16, 18, 19, 20, 21,
22 (at D, Ds, B, L range),
23 (at D, Ds, B, L range),
24 (at R range), 25, 26, 27, 28, 29
11
Abnormal noise occurs while the vehicle is being driven.
2, 18, 19, 21, 25, 26, 27, 28, 29
-
Abnormal noise occurs while the engine is idling.
1, 2, 18, 19, 21, 25, 26, 27
-
Others
The starter can operate at the R, D, Ds, B or L range.
4, 6
-
The engine stalls while the vehicle is stopped at the R, D, Ds, B or L range.
1, 5, 10, 14, 18, 20
-
The starter cannot operate at the P or N range.
4, 6
22, 23
The parking mechanism does not operate at the P range.
4, 6, 30
-
The parking mechanism cannot be released when shifting from the P range to another range.
4, 6, 30
-
The engine stalls while the vehicle is stationary at the P or N range.
1, 5, 10, 11, 14
22, 23

Possible cause chart


Possible cause No.
Probable cause
Remedy
1
Malfunction of the engine system
Check the engine system, and repair or replace if necessary.
2
Improper CVT fluid level
Check the CVT fluid, and repair or replace if necessary.
3
Not within the standard value of the line pressure
Check the hydraulic system, and repair or replace if necessary.
4
Malfunction of transmission control cable
Check the transmission control cable, and repair or replace if necessary.
5
Electric system

The CVT-ECU is defective.
Check the CVT-ECU, and repair or replace if necessary.
6
Malfunction of the inhibitor switch
Check the inhibitor switch, and repair or replace if necessary.
7
Malfunction of the Ds position switch
<6 position type>
Check the Ds position switch, and repair or replace if necessary.
8
Malfunction of the primary pulley speed sensor
Check the primary pulley speed sensor, and repair or replace if necessary.
9
Malfunction of the secondary pulley speed sensor
Check the secondary pulley speed sensor, and repair or replace if necessary.
10
Malfunction of the output speed sensor
Check the output speed sensor, and repair or replace if necessary.
11
Malfunction of the secondary pressure sensor
Replace the CVT assembly
12
Malfunction of the primary pressure solenoid valve
13
Malfunction of the line pressure solenoid valve
14
Malfunction of the lock-up solenoid valve
15
Malfunction of the high clutch and reverse brake solenoid valve
16
Malfunction of the low brake solenoid valve
17
Malfunction of the CVT fluid temperature sensor
18
Hydraulic system
Malfunction of the valve body or the control valve
19
Malfunction of the oil pump
20
Drivetrain system
Malfunction of torque converter
21
Malfunction of the pulley and the steel belt
22
Malfunction of the low brake
23
Malfunction of the high clutch
24
Malfunction of the reverse brake
25
Malfunction of the bearings
26
Malfunction of the counter gear
27
Malfunction of the planetary gear
28
Malfunction of the reduction gear
29
Malfunction of the final gear or the differential gear
30
Malfunction of the parking mechanism