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
2
,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
1871-1U-06B(05-17).fm 5 ページ 2006年3月15日 水曜日 午前11時20分
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
R
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
N
→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
N
→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
1871-1U-06B(05-17).fm 6 ページ 2006年3月15日 水曜日 午前11時20分
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
{0}
10
{6.2}
20
{12}
30
{19}
40
{25}
50
{31}
60
{37}
70
{43}
80
{50}
90
{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
O
TTLE OPENING
6GR TCC
OPERATION ON
5GR TCC
OPERATION OFF
4GR TCC
OPERATION OFF
6
5
5
4
3
2
5
4
6
5
4
3
4
3
3
2
2
1
2
1
SHIFT UP
SHIFT DOWN
6GR TCC
OPERATION OFF
4GR TCC
OPERATION ON
5GR TCC
OPERATION ON
acxuuw00000482
1871-1U-06B(05-17).fm 7 ページ 2006年3月15日 水曜日 午前11時20分
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,
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)
D
NORMAL
Wide open
throttle
D
1
→D
2
43— 49 {27— 30}
5,100— 5,750
D
2
→D
3
76— 84 {48— 52}
5,150— 5,650
D
3
→D
4
112— 122 {70— 75}
4,950— 5,350
TCC ON (D
4
)
112— 122 {70— 75}
3,700— 4,000
D
4
→D
5
157— 167 {98— 103}
5,150— 5,450
TCC ON (D
5
)
135— 145 {84— 89}
3,300— 3,500
D
5
→D
6
217— 227 {135— 140}
5,300— 5,500
TCC ON (D
6
)
210— 220 {131— 136}
4,100— 4,250
Half throttle
D
1
→D
2
24— 31 {15— 19}
2,800— 3,650
D
2
→D
3
46— 60 {29— 37}
3,100— 4,050
D
3
→D
4
70— 93 {44— 57}
3,100— 4,100
TCC ON (D
4
)
97— 118 {61— 73}
3,200— 3,850
D
4
→D
5
106— 132 {66— 81}
3,500— 4,350
TCC ON (D
5
)
106— 132 {66— 81}
2,600— 3,200
D
5
→D
6
181— 202 {113— 125}
4,450— 4,900
TCC ON (D
6
)
181— 202 {113— 125}
3,550— 3,900
Closed throttle
position
D
6
→D
5
64— 70 {40— 43}
1,250— 1,350
D
5
→D
4
31— 37 {20— 22}
800— 900
D
4
→D
3
22— 28 {14— 17}
750— 900
D
3
→D
1
5— 11 {4— 6}
250— 450
D
2
→D
1
5— 11 {4— 6}
350— 700
Kickdown
D
6
→D
5
200— 210 {124— 130}
3,900— 4,050
D
5
→D
4
140— 150 {87— 93}
3,450— 3,650
D
4
→D
3
90— 100 {56— 62}
3,000— 3,250
D
3
→D
2
59— 67 {37— 41}
2,650— 2,950
D
2
→D
1
24— 30 {15— 18}
1,650— 2,000
1871-1U-06B(05-17).fm 8 ページ 2006年3月15日 水曜日 午前11時20分
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