Mazda MX-6 1998, Workshop Manual

Page: 817 / 1282

AUTOMATIC TRANSAXLE [LA4A-EL]
Preliminary set up
1. Set the Bench/Drive switch to DRIVE mode.
2. Rotate the gear select switch on tester to the
GEAR SELECT “ 1” position.
2. Rotate the gear select switch to GEAR SELECT
ic - j ii
3. Set the vehicle in PART.
4. Start the engine.
Electrical pressure control (EPC) solenoid
Caution
•
Do not attempt to keep the EPC switch
depressed (minimum line pressure) and
stall the transaxle (holding the vehicle with
the brake while depressing the throttle
with the transaxle in gear). Transaxle
damage will result.
1. Observe the line pressure. Record the value. Line
pressure should go to maximum. If not, refer to
0 5 -0 1 A AUTOMATIC TRANSAXLE SYMPTOM
TROUBLESHOOTING [LA4A-EL] or Pinpoint test
“E” concerning the EPC solenoid, (refer to 0 5 -0 1 A
AUTOMATIC TRANSAXLE ON-BOARD
DIAGNOSIS [LA4A-EL].)
2. Depress the EPC switch. Line pressure should
drop to a minimum value. Record the value. If not,
refer to 0 5 -0 1 A AUTOMATIC TRANSAXLE
SYMPTOM TROUBLESHOOTING [LA4A-EL] or
Pinpoint Test “E”. (refer to 0 5 -0 1 A AUTOMATIC
TRANSAXLE ON-BOARD DIAGNOSIS
[LA4A-EL].)
9
9 9
. .
W 6 U 5 1 7 W A H
3. Turn GEAR SELECT switch to 3/R.
(1) Shift vehicle from PARK to REVERSE.
• Did vehicle shift into REVERSE?
• Was engagement harsh?
(2)
Shift vehicle from REVERSE to PARK.
4.
Turn GEAR SELECT switch to 1.
(1) Depress EPC switch. Line pressure should
drop to idle pressure.
(2)
While holding the EPC switch down, shift
vehicle from PARK to DRIVE.
• Did the vehicle shift into DRIVE?
• Was engagement smooth?
(3) Shift the vehicle from DRIVE to PARK.
(4)
Release EPC switch. Pressure should return
to maximum.
(5)
With the EPC switch released, repeat step
5.
Engagement should be firm.
Upshift Downshift
Note
• GEAR SELECT SWITCH must be in GEAR
SELECT “3/R” to get REVERSE gear.
O O
EPC
©
O
I
V PW R /E P C
STATUS
P W R
ACTIVATE
1
g
W 6 U 5 1 7 W A J
Transaxle engagement
1
W 6 U 5 1 7 W A G
Note
Engagement will be harsh and line pressure
will be at maximum regardless of the EPC
switch during reverse check.
Upshifts and downshifts will be FIRM during
this procedure.
Pressure gauges may be removed from the
vehicle during these tests.
These tests should be performed on the road.
If they are performed on the hoist, a mechanic
may not feel all of the shifts when they are
engaged.
LED’s will turn “green” when solenoids are
activated and turn “off” when deactivated.
Refer to the appropriate overlay for the proper
status/shift sequence of the shift solenoids
during upshift and downshift.
1. Set the Bench/Drive switch to the “ DRIVE” mode.
0 5 -1 7 A -1 2