Page 869 of 1865
OUTLINE 7B
COMPONENT LOCATION
G4A-EL
76G07B-003
1. Hold indicator light
2. EC-AT control unit
3. Vehicle speed sensor
4. Mode indicator light
5. Cruise control unit
6. Cruise control switch
7. Mode switch
8. Hold switch
9. Water temperature switch
10. Throttle sensor and idle
switch
11. Fluid temperature switch
12. EC-AT
13. Pulse genelator
14. Solenoid valves
15. Inhibitor switch
7B-3
Page 870 of 1865
7B OUTLINE
G4A-HL
1. OD OFF indicator light
2. OD OFF switch
3. Kick-down switch
4. Cruise control unit
5. Cruise control switch
6. Water temperature switch
7. Inhibitor switch
8. OD release solenoid valve
9. Automatic transaxle
76G07B-004
7B—4
Page 880 of 1865
7B TROUBLESHOOTING (G4A-EL)
ON VEHICLE-
-f-
—OFF VEHICLE
\ Inspection point
and
\ reference page
Condition
•
Electronic control system Prelim-
inary
Hydraulic
control
system
Power train \ Inspection point
and
\ reference page
Condition
•
7B-66
m CO I m r--
7B-63
i
cn to I m
Section
4B
|
Section
4B
|
ID to i m
CO CO 1 CD
7B-68
|
en CO 1 IX)
to 1 00 r-.
cn CD 1 CO
7B-69
|
1 CD r--
i no
cn s-1 m
Section
4B
r*-cn
S-1 CD h-
"=1-
rJ CO
7 CD r-
(XI o
1 m
cn CM 1 CD
7B-107
|
CD
7 CD 7 m
I
7B-113
I
CO CM
7 CO r-.
m cn
7 CO r-.
cn
7 DO r-
CM CM
7 CO
|
7B-126
7 00 r-
CO
7 cn
1*-r*-
7 m r-
\ Inspection point
and
\ reference page
Condition
•
Brake
light
switch
|
Inhibitor
switch
|
Mode
switch
|
1
CO. •o o X
Idle
switch
Throttle
sensor
|
Water
temp,
switch
|
0 tn c 0) cn
s
ffi
Q tn 01 o Hi >
Pulse
generator
|
"a o c 0) a to CM
TJ O CL ID s CO C\l 3-4
solenoid
|
Lock-up
solenoid
I
ATF
level
and
condition
|
Selector
lever
m Xj CO CJ 03
1 sz
Idle
speed
and
Ignition
timing
Control
valves
Accumulators
Oil
pump
Hydraulic
circuit
Torque
converter
Forward
clutch
Coasting
clutch
Reverse
clutch
JT O
u TT ro 2-4
brake
band
and
servo
$ 2
B cn cii > £ "O C CO
o
XI y
o >. CO S cb a O
One-way
clutch
2
s CI Cn tz JC 5 0-
Planetary
gear
Differential
assembly
Accelerating
Vehicle does
not
move
in
D,
S,
L,
or R
range
O O O O O O O O O O 0
Accelerating
Vehicle moves
in N
range -0 0 -—
Accelerating
Excessive creep
-0 O O -—
Accelerating
No creep
at all
O o o o
o
G 0 O O
Shifting
|
No shift
O O o
o
0 O 0 0
o
o O
Shifting
|
Abnormal shift sequence
0 o O O 0
o
o 0 O o o 0 O
Shifting
|
Frequent shifting 0 o 0 0 o 0 O O 0
Shifting
|
Excessively high
or
low
shift point 0 o 0 O 0 0 o 0 O 0 0
Shifting
|
No lock-up
0 o 0 0 o 0 O O o O
Shifting
|
No kick-down o o o o
Slipping
Engine
run
away
or
slip when
starting vehicle 0 o 0 O o O
Slipping
Engine
run
away
or
slip when
up-
or
down-shifting o o o 0 o O 0 0 O
8 n cn 4S SI V)
Excessive
N to D or N to R
shift shock o O o o o O
8 n cn 4S SI V)
Excessive shift shock when
up-
shifting
or
downshifting o o o o 0 0 0 8 n cn 4S SI V) Excessive shift shock when
changing range 0 0 o 0 o
j
Noise
Transaxle noisy
in N or P
range o o 0 O
j
Noise
Transaxle noisy
in D, S, L,
or
R range o 0 0 O
I
Others
j
No engine braking o O o 0 o o
I
Others
j
No mode change o 0 o o o o o o o
O
o
0
I
Others
j
Transaxle overheats
o o
0 o 0 o 0
I
Others
j
Vehicle moves
in
"P",
or
park-ing gear
not
disengaged when
"P"
is
dis-
engaged
0 O
I
Others
j
Hold indicator flashes o
0
o
0
o
O
o — — —
I
Others
j
Engine will
not
start
o
o
O — — —
76G07B-014
7B—14
Page 891 of 1865
TROUBLESHOOTING (G4A-EL) 7B
Item Indication Condition Possible cause
BRAKE LIGHT SW ON Brake pedal depressed Brake light switch or
wiring BRAKE LIGHT SW
OFF Brake pedal released
Brake light switch or
wiring
WATER TEMP SW ON Coolant temperature 72°C (162°F) or above Water temp switch or wiring WATER TEMP SW
OFF Coolant temperature lower than 65°C (149°F)
Water temp switch or wiring
ATF TEMP SW ON ATF temperature 150°C (302°F) or above Fluid temperature switch or wiring ATF TEMP SW
OFF ATF temperature lower than 143°C (289°F)
Fluid temperature switch or wiring
CRUISE CONTROL SW Not used — —
Input (Digital display)
THROTTLE SENSOR
EC-AT control unit terminal voltage All the time Throttle sensor, idle switch or wirings
VEHICLE SPEED*
Vehicle speed calculated from speed sensor signal
All the time Vehicle speed sensor, speedometer cable, or wiring
DRUM SPEED* Drum speed All the time Pulse generator or wirings
Output (Light)
1-2 SOLENOID VALVE*
ON
Refer to page 7B—26 solenoid valve operation table
Control unit, 1-2 shift sol., or wiring 1-2 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table
Control unit, 1-2 shift sol., or wiring
2-3 SOLENOID VALVE*
ON Refer to page 7B—26 solenoid valve operation table Control unit, 2-3 shift sol., or wiring 2-3 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table Control unit, 2-3 shift sol., or wiring
3-4 SOLENOID VALVE*
ON
Refer to page 7B—26 solenoid valve operation table
Control unit, 3-4 shift sol., or wiring 3-4 SOLENOID VALVE* OFF
Refer to page 7B—26 solenoid valve operation table
Control unit, 3-4 shift sol., or wiring
LOCK-UP SOLE-NOID VALVE*
ON Lock-up condition Control unit, lock-up sol., or wiring LOCK-UP SOLE-NOID VALVE* OFF Non-lock-up condition
Control unit, lock-up sol., or wiring
HOLD INDICATOR ON Hold mode Control unit, Hold switch, or wiring HOLD INDICATOR OFF Other modes
Control unit, Hold switch, or wiring
MODE INDICATOR ON Power or economy mode Control unit, hold switch, mode switch, or wiring MODE INDICATOR
OFF Hold mode
Control unit, hold switch, mode switch, or wiring
NO LOAD SIGNAL Not used — —
76G07B-028
7B-25
Page 893 of 1865
TROUBLESHOOTING (G4A-EL) 7B
STEP 4 (STALL TEST)
This step is performed to determine if there is slippage of the friction elements or malfunction of the
hydraulic components.
Preparation
Check the following items prior to testing:
1. Engine coolant, engine oil and ATF levels.
2. Warm the engine thoroughly to raise the ATF temperature to operating level (50—80°C, 122—176°F).
3. Engage the parking brake and use wheel chocks at the front and rear wheels.
Pull the parking brake Water temperature
ATF
79G07C-084
7B-27
Page 914 of 1865
7B TROUBLESHOOTING (G4A-HL)
76G07B-052
Water Temperature Switch Inhibition Function
1. Stop the vehicle.
2. Disconnect the water temperature switch con-
nector.
3. Drive the vehicle in D range selected.
4. Check that OD and lock-up does not operate.
5. If not cancelled, check the wiring harness of the
water temperature switch.
6. Stop the vehicle and reconnect the water temper-
ature switch connector.
Kick-down Switch Inhibition Function
1. Connect the terminals of the kick-down switch con-
nector with a jumper wire.
2. Drive the vehicle in D range selected.
3. Check that the OD and lock-up do not achieve.
4. If not correct, check wiring harness of kick-down
switch.
5. Stop the vehicle and reconnect the connector to
the switch.
7B—48
Page 915 of 1865
TROUBLESHOOTING (G4A-HL) 7B
STEP 3 (STALL TEST)
This step is performed to determine if there is slippage of the friction elements or malfunction of the
hydraulic components.
Preparation
Check the following items prior to testing:
1. Engine coolant, engine oil and ATF levels.
2. Warm the engine thoroughly to raise the ATF temperature to operating level (50—80°C, 122—176°F).
3. Engage the parking brake and use wheel chocks at the front and rear wheels.
Pull the parking brake Water temperature
ATF
83U07B-038
7B—49
Page 932 of 1865
7B ELECTRICAL SYSTEM COMPONENTS
76G07B-073
7B-66
3. Remove the screw and move the inhibitor switch
so that the small hole is aligned with the screw hole.
4. Set the alignment by inserting a 2.0 mm (0.079
in) diameter pin through the holes.
5. Loosely tighten the switch mounting bolts, remove
the pin, and reinstall the screw.
6. Tighten the switch mounting bolts to specification.
Tightening torque:
8—11 N-m (80—110 cm-kg, 69—95 in-lb)
7. Recheck the continuity of the individual terminals.
WATER TEMPERATURE SWITCH
Inspection
1. Remove the water temperature switch.
2. Place the switch in water with a thermometer and
heat up the water gradually.
3. Check the continuity of the terminals. If necessary
replace the switch.
Connection guide
Water temperature Continuity
Below 65°C (149°F) Yes
Above 72°C (162°F) \ No
FLUID TEMPERATURE SWITCH (G4A-EL)
Inspection
1. Remove the fluid temperature switch.
2. Place the switch in oil with a thermometer as shown
and heat it up gradually.
3. Check the continuity of the terminals. If necessary
replace the switch.
Connection guide
Fluid temperature Continuity
Above 150°C (302°F) Yes
Below 143°C (289°F) No
BRAKE LIGHT SWITCH (G4A-EL)
Inspection of Terminal Voltage
1. Turn the ignition switch ON.
2. Check the voltage between terminal (WG) and
ground while depressing the brake pedal.
Terminal voltage I Brake pedal
Approx. 12V Depressed
Below 1,5V Released
3. If not correct, check continuity of the switch.
