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Mazda CX 7. Manual - part 254

AUTOMATIC TRANSAXLE [AW6A-EL, AW6AX-EL]

05-17–5

05-17

17. Verify that the line pressure and LPS PID current values change according to the following graph by changing

the shift throttle opening angle when shifting to the D range and R position with the engine running.

— The line pressure standard other than when the engine is idling cannot be determined because the

maximum line pressure for this automatic transaxle is controlled by vehicle conditions.

Warning

• Removing the SST when the ATF is hot can be dangerous. Hot ATF can come out of the opening

and badly burn you. Before removing the SST, allow the ATF to cool.

18. Remove the SSTs.
19. Install a test plug in the inspection port.

Tightening torque

5.9— 8.8 N·m {61— 89 kgf·cm, 53— 77 in·lbf}

Line pressure test evaluation

Stall Test

1. Perform mechanical system test preparation. (See 05-17-3 Mechanical System Test Preparation.)
2. Start the engine.
3. Firmly depress the brake pedal with the left foot.
4. Shift the selector lever to the D range.

Caution

• If the accelerator pedal is depressed for more than 5 s while the brake pedal is depressed, the

transaxle could be damaged. Therefore, perform Steps 5 and 6 within 5 s.

• Perform the test at least 3 times and calculate the average.

5. Gently depress the accelerator pedal with the right foot.
6. When the engine speed no longer increases, quickly read the engine speed and release the accelerator pedal.
7. Shift the selector lever to the N position and idle the engine for 1 min or more to cool the ATF.
8. Perform a stall test of the M range and R position in the same manner as in Steps 3— 7.
9. Turn off the engine.

1,500
{15.3, 218}

2,000
{20.4, 290}

500
{5.1, 73}

300
{5.1, 73}

1,000

300

THROTTLE OPENING

STALL

IDLE

D RANGE

R POSITION

LINE PRESSURE
(kPa {kgf/cm

,psi})

LINE PRESSURE
CONTROL SOLENOID
CURRENT
(mA)

LINE PRESSURE

CURRENT

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Condition

Possible cause

Lower than specification in D range and
R position

• Line pressure control solenoid malfunction

• Primary regulator valve malfunction

• Oil pump malfunction

• Oil leaking from D range or R position hydraulic circuit

Constant pressure without fluctuation in
hydraulic pressure to throttle in D range
and R position

• Line pressure control solenoid malfunction

• Control valve body internal malfunction

Current to throttle does not change in D
range and R position

• TCM internal malfunction

• Connector malfunction

Hydraulic pressure in R position is not
higher than D range

• Primary regulator valve malfunction

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AUTOMATIC TRANSAXLE [AW6A-EL, AW6AX-EL]

05-17–6

Engine stall speed

Evaluation of stall test

Time Lag Test

1. Perform mechanical system test preparation. (See05-17-3 Mechanical System Test Preparation.)
2. Start the engine.
3. Warm up the engine until the ATF temperature reaches 60— 70

°C {140— 158°F}.

4. Shift the selector lever from the N position to D range.
5. Use a stopwatch to measure the time it takes from shifting until shock is felt. Take three measurements for each

test and average from the results using the following formula.

Formula

Average time lag = (Time 1 + Time 2 + Time 3) / 3

6. Perform the test for the following shifts in the same manner as in Step 5.

• N position → R position

Average time lag

N position

→ D range: 1.5 s or less

N position

→ R position: 1.5 s or less

Evaluation of time lag test

End Of Sie

Position/range

Engine stall speed (rpm)

D, M

2,800

Condition

Possible cause

Above specification

In D, M ranges

• Low line pressure (Line pressure control solenoid

malfunction, primary regulator valve malfunction)

• Control valve body component malfunction (shift solenoid

C hydraulic pressure system)

• C1 clutch slipping

• One-way clutch malfunction

In R position

• Low line pressure (Line pressure control solenoid

malfunction, primary regulator valve malfunction)

• Control valve body component malfunction (shift solenoid

E hydraulic pressure system)

• C3 clutch malfunction (slipping)

• B2 brake malfunction (slipping)

In all positions/ranges

• Low line pressure (Line pressure control solenoid

malfunction, primary regulator valve malfunction)

• Oil pump malfunction

• Oil strainer clogging

Below specification

• Engine lack of power

• Torque converter one-way clutch slipping

Condition

Possible cause

→D shift

More than specification

• Control valve body malfunction (shift solenoid C hydraulic

pressure system)

• C1 clutch slipping

• One-way clutch malfunction

• Oil pump malfunction

• Oil strainer clogging

→R shift

More than specification

• Control valve body malfunction (shift solenoid E hydraulic

pressure system)

• C3 clutch slipping

• B2 brake slipping

• Oil pump malfunction

• Oil strainer clogging

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AUTOMATIC TRANSAXLE [AW6A-EL, AW6AX-EL]

05-17–7

05-17

ROAD TEST[AW6A-EL, AW6AX-EL]

id051723802200

Warning

• When performing a road test, be aware of other vehicles, people, and other impediments in order

to avoid an accident.

Note

• When the legal speed limit must be exceeded, use a chassis dynamometer instead of performing a road

test.

Road Test Preparation

1. Inspect the engine coolant level. (See 01-12-2 COOLING SYSTEM SERVICE WARNINGS[L3 WITH TC].) (See

01-12-3 ENGINE COOLANT LEVEL INSPECTION[L3 WITH TC].)

2. Inspect the engine oil level. (See 01-11-3 ENGINE OIL LEVEL INSPECTION[L3 WITH TC].)
3. Inspect the ATF level. (See 05-17-10 AUTOMATIC TRANSAXLE FLUID (ATF) INSPECTION[AW6A-EL,

AW6AX-EL].)

4. Inspect the idle speed. (See 01-10-35 ENGINE TUNE-UP[L3 WITH TC].)
5. Inspect the ignition timing. (See 01-10-35 ENGINE TUNE-UP[L3 WITH TC].)
6. Bring up the engine and transaxle to normal operating temperature.

Shift Diagram
D range (normal mode)

0/8

1/8

2/8

3/8

4/8

5/8

6/8

7/8

8/8

{0}

{6.2}

{12}

{19}

{25}

{31}

{37}

{43}

{50}

{56}

100

{62}

110

{68}

120

{74}

130

{81}

140

{87}

150

{93}

160

{99}

170

{105}

190

{118}

200

{124}

210

{131}

220

{137}

230

{143}

180

{112}

VEHICLE SPEED km/h {mph}

TCC OPERATION AVAILABLE

THR

TTLE OPENING

6GR TCC
OPERATION ON

5GR TCC
OPERATION OFF

4GR TCC
OPERATION OFF

SHIFT UP

SHIFT DOWN

6GR TCC
OPERATION OFF

4GR TCC
OPERATION ON

5GR TCC
OPERATION ON

acxuuw00000482

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AUTOMATIC TRANSAXLE [AW6A-EL, AW6AX-EL]

05-17–8

D Range Test

1. Perform road test preparation. (See05-17-7 Road Test Preparation.)
2. Shift the selector lever to D range.
3. Accelerate with the depressing amount of accelerator pedal half and then fully depress.
4. Verify that 1

→2, 2→3, 3→4, 4→5, and 5→6 upshifts and downshifts are obtained. The shift points must be as

shown in the table below.

• If there is any malfunction, inspect the TCM and ATX. (See 05-03-4 SYMPTOM TROUBLESHOOTING

ITEM TABLE[AW6A-EL, AW6AX-EL].)

5. Drive the vehicle in 6GR, 5GR, 4GR, 3GR, and 2GR and verify that kickdown occurs for 6

→5, 5→4, 4→3,

→2, 2→1 downshifts, and that the shift points are as shown in the table below.

• If there is any malfunction, inspect the TCM and ATX. (See 05-03-4 SYMPTOM TROUBLESHOOTING

ITEM TABLE[AW6A-EL, AW6AX-EL].)

6. Drive the vehicle and verify that TCC operation is obtained. The operation points must be as shown in the table

below.

• If there is any malfunction, inspect the TCM and ATX. (See 05-03-4 SYMPTOM TROUBLESHOOTING

ITEM TABLE[AW6A-EL, AW6AX-EL].)

Vehicle speed at shift point table

Range

Mode

Throttle

condition

Shift

Vehicle speed

(km/h {mph})

Turbine speed

(rpm)

NORMAL

Wide open
throttle

→D

43— 49 {27— 30}

5,100— 5,750

→D

76— 84 {48— 52}

5,150— 5,650

→D

112— 122 {70— 75}

4,950— 5,350

TCC ON (D

)

112— 122 {70— 75}

3,700— 4,000

→D

157— 167 {98— 103}

5,150— 5,450

TCC ON (D

)

135— 145 {84— 89}

3,300— 3,500

→D

217— 227 {135— 140}

5,300— 5,500

TCC ON (D

)

210— 220 {131— 136}

4,100— 4,250

Half throttle

→D

24— 31 {15— 19}

2,800— 3,650

→D

46— 60 {29— 37}

3,100— 4,050

→D

70— 93 {44— 57}

3,100— 4,100

TCC ON (D

)

97— 118 {61— 73}

3,200— 3,850

→D

106— 132 {66— 81}

3,500— 4,350

TCC ON (D

)

106— 132 {66— 81}

2,600— 3,200

→D

181— 202 {113— 125}

4,450— 4,900

TCC ON (D

)

181— 202 {113— 125}

3,550— 3,900

Closed throttle
position

→D

64— 70 {40— 43}

1,250— 1,350

→D

31— 37 {20— 22}

800— 900

→D

22— 28 {14— 17}

750— 900

→D

5— 11 {4— 6}

250— 450

→D

5— 11 {4— 6}

350— 700

Kickdown

→D

200— 210 {124— 130}

3,900— 4,050

→D

140— 150 {87— 93}

3,450— 3,650

→D

90— 100 {56— 62}

3,000— 3,250

→D

59— 67 {37— 41}

2,650— 2,950

→D

24— 30 {15— 18}

1,650— 2,000

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