AT-290
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Vehicle will not run in “D”, “1”, “2” posi-
tions (but runs in “R” position). Clutch
slips. Very poor acceleration.
AT- 3 2 1 , "
Vehicle Does Not Creep For-
ward In “D”,“2” Or “1” Position"
OFF vehicle7. Reverse clutch AT-463, "
Reverse Clutch"
8. High clutchAT-466, "High Clutch"
9. Forward clutchAT-471, "Forward and
Overrun Clutches"
10. Forward one-way clutchAT-421, "OVERHAUL"
11. Low one-way clutchAT-421, "
OVERHAUL",
AT-425, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
Clutches or brakes slip somewhat in
starting.ON vehicle1. Fluid levelAT-264, "
FLUID LEVEL
CHECK"
2. Control cable adjustmentAT-416, "Control Cable
Adjustment"
3. Accelerator pedal position (APP) sensorAT-362, "
ACCELE
RATOR PEDAL POSI-
TION (APP) SENSOR"
4. Line pressure testAT-268, "Line Pressure
Te s t"
5. Line pressure solenoid valveAT-396, "
LINE PRES-
SURE SOLENOID
VA LV E"
6. Control valve assemblyAT-414, "
Control Valve
Assembly and Accumula-
tors"
7. Accumulator N-DAT-414, "
Control Valve
Assembly and Accumula-
tors"
8. Shift solenoid valve AAT-367, "SHIFT SOLE-
NOID VALVE A"
9. Shift solenoid valve BAT-372, "SHIFT SOLE-
NOID VALVE B"
10. Overrun clutch solenoid valveAT-377, "
OVERRUN
CLUTCH SOLENOID
VA LV E"
11. Torque converter clutch solenoid valveAT-381, "
TORQUE CON-
VERTER CLUTCH
SOLENOID VALVE"
OFF vehicle12. Forward clutchAT-471, "
Forward and
Overrun Clutches"
13. Reverse clutchAT-463, "Reverse Clutch"
14. Low & reverse brakeAT-476, "Low & Reverse
Brake"
15. Oil pumpAT-444, "Oil Pump"
16. Torque converterAT-425, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
Excessive creep. ON vehicle 1. Engine idling rpmEC-1391, "Idle Speed and
Ignition Timing"
Symptom Condition Diagnostic Item Reference Page
AT-292
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Failure to change gear from “D3 ” to
“D
4 ”.ON vehicle1. PNP switchAT-344, "
TCM Self-diag-
nosis Does Not Activate"
2. Overrun clutch solenoid valveAT-377, "
OVERRUN
CLUTCH SOLENOID
VA LV E"
3. Shift solenoid valve AAT-367, "SHIFT SOLE-
NOID VALVE A"
4. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-353, "
VEHICLE
SPEED SENSOR·A/T
(REVOLUTION SEN-
SOR)",AT-358, "DTC
VEHICLE SPEED SEN-
SOR MTR"
5. A/T fluid temp sen circ and TCM pow
sourAT-386, "
BATT/FLUID
TEMP SEN (A/T FLUID
TEMP SENSOR CIR-
CUIT AND TCM POWER
SOURCE)"
OFF vehicle 6. Brake bandAT-488, "Band Servo Pis-
ton Assembly"
Too high a gear change point from “D1
” to “D2 ”, from “D2 ” to “D3 ”, from “D3
” to “D4 ”.
AT- 3 2 6 , "
A/T Does Not Shift: D1→ D2
Or Does Not Kick down: D4→ D2"
andAT-330, "A/T Does Not Shift: D3
→ D4"
ON vehicle1. Accelerator pedal position (APP) sensorAT-362, "
ACCELE
RATOR PEDAL POSI-
TION (APP) SENSOR"
2. Vehicle speed sensor·A/T (Revolution
sensor) and vehicle speed sensor·MTRAT-353, "
VEHICLE
SPEED SENSOR·A/T
(REVOLUTION SEN-
SOR)",AT-358, "DTC
VEHICLE SPEED SEN-
SOR MTR"
3. Shift solenoid valve AAT-367, "SHIFT SOLE-
NOID VALVE A"
4. Shift solenoid valve BAT-372, "SHIFT SOLE-
NOID VALVE B"
Gear change directly from “D1 ” to “D3
” occurs.ON vehicle1. Fluid levelAT-264, "
FLUID LEVEL
CHECK"
2. Accumulator servo releaseAT-414, "
Control Valve
Assembly and Accumula-
tors"
OFF vehicle 3. Brake bandAT-488, "Band Servo Pis-
ton Assembly"
Engine stops when shifting lever into
“R”, “D”, “2” and “1”.ON vehicle1. Engine idling rpmEC-1391, "
Idle Speed and
Ignition Timing"
2. Fluid levelAT-264, "FLUID LEVEL
CHECK"
3. Torque converter clutch solenoid valveAT-381, "
TORQUE CON-
VERTER CLUTCH
SOLENOID VALVE"
4. Control valve assemblyAT-414, "
Control Valve
Assembly and Accumula-
tors"
OFF vehicle 5. Torque converterAT-425, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
Symptom Condition Diagnostic Item Reference Page
AT-302
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
Transmission overheats. ON vehicle1. Fluid levelAT-264, "
FLUID LEVEL
CHECK"
2. Engine idling rpmEC-1391, "Idle Speed and
Ignition Timing"
3. Accelerator pedal position (APP) sensorAT-362, "
ACCELE
RATOR PEDAL POSI-
TION (APP) SENSOR"
4. Line pressure testAT-268, "Line Pressure
Te s t"
5. Line pressure solenoid valveAT-396, "
LINE PRES-
SURE SOLENOID
VA LV E"
6. Control valve assemblyAT-414, "
Control Valve
Assembly and Accumula-
tors"
Transmission overheats. OFF vehicle7. Oil pumpAT-444, "
Oil Pump"
8. Reverse clutchAT-463, "Reverse Clutch"
9. High clutchAT-466, "High Clutch"
10. Brake bandAT-488, "Band Servo Pis-
ton Assembly"
11. Forward clutchAT-471, "Forward and
Overrun Clutches"
12. Overrun clutchAT-471, "Forward and
Overrun Clutches"
13. Low & reverse brakeAT-476, "Low & Reverse
Brake"
14. Torque converterAT-425, "
Locations of
Adjusting Shims, Needle
Bearings, Thrust Washers
and Snap Rings"
ATF shoots out during operation.
White smoke emitted from exhaust
pipe during operation.ON vehicle 1. Fluid levelAT-264, "
FLUID LEVEL
CHECK"
OFF vehicle2. Reverse clutchAT-463, "
Reverse Clutch"
3. High clutchAT-466, "High Clutch"
4. Brake bandAT-488, "Band Servo Pis-
ton Assembly"
5. Forward clutchAT-471, "Forward and
Overrun Clutches"
6. Overrun clutchAT-471, "Forward and
Overrun Clutches"
7. Low & reverse brakeAT-476, "Low & Reverse
Brake"
Symptom Condition Diagnostic Item Reference Page
AT-306
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
TCM Terminals and Reference Value
ECS004VW
PREPARATION
●Measure voltage between each terminal and terminal 25 or 48
by following “TCM INSPECTION TABLE”.
TCM HARNESS CONNECTOR TERMINAL LAYOUT
TCM INSPECTION TABLE
(Data are reference values.)
SAT216J
SCIA0712E
Te r m i -
nal No.Wire color Item ConditionJudgementstan-
dard(Approx.)
1R/WLine pressure
solenoid valveWhen releasing accelerator pedal
after warming up engine.1.5 - 3.0V
When depressing accelerator pedal
fully after warming up engine.0V
2P/BLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal
after warming up engine.5 - 14V
When depressing accelerator pedal
fully after warming up engine.0V
3GY/RTorque converter
clutch solenoid
valveWhen A/T performs lock-up. 8 - 15V
When A/T does not perform lock-up. 0V
5QR20DE:
B/W
QR25DE:
W/BCAN-H (high) — — —
6 L/R CAN-L (low) — — —
10 BR/W Power source
or When turning ignition switch to “ON”. Battery voltage
When turning ignition switch to
“OFF”.0V
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
AT-307
[EXC.F/EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
11 L / WShift solenoid
valve AWhen shift solenoid valve A oper-
ates.
(When driving in “D1 ” or “D4 ”.)Battery voltage
When shift solenoid valve A does not
operate.
(When driving in “D
2 ” or “D3 ”.)0V
12 L/YShift solenoid
valve BWhen shift solenoid valve B oper-
ates.
(When driving in “D
1 ” or “D2 ”.)Battery voltage
When shift solenoid valve B does not
operate.
(When driving in “D
3 ” or “D4 ”.)0V
13 R/LO/D OFF indica-
tor lampWhen setting overdrive control or A/
T check switch in “OFF” position.0V
When setting overdrive control or A/
T check switch in “ON” position.Battery voltage
19 BR/W Power source
or Same as No. 10
20 L/BOverrun clutch
solenoid valveWhen overrun clutch solenoid valve
operates.Battery voltage
When overrun clutch solenoid valve
does not operate.0V
22 L/OROverdrive control
switch
and When setting overdrive control
switch in “ON” positionBattery voltage
When setting overdrive control
switch in “OFF” position0V
25 B/W Ground — — 0V
26 BR/YPNP switch “1”
position
and When setting selector lever to “1”
position.Battery voltage
When setting selector lever to other
positions.0V
27 LPNP switch “2”
positionWhen setting selector lever to “2”
position.Battery voltage
When setting selector lever to other
positions.0V
28 R/BPower source
(Memory back-up)
or When turning ignition switch to
“OFF”.Battery voltage
When turning ignition switch to “ON”. Battery voltage
29 W Revolution sensorWhen moving at 20 km/h (12 MPH),
use the CONSULT-II pulse frequency
measuring function.*1
CAUTION:
Connect the diagnosis data link
cable to the vehicle diagnosis
connector.
*1: A circuit tester cannot be used to
test this item.450 Hz
When vehicle parks.Under 1.3V or
over 4.5V
30 *3 G/B CONSULT- II (RX) — —
31 *3 GY/L CONSULT- II (TX) — — Termi-
nal No.Wire color Item ConditionJudgementstan-
dard(Approx.)
AT-308
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSIS — GENERAL DESCRIPTION
*2: These terminals are connected to the ECM.
*3: These terminals are connected to the data link connector.32 *2 RThrottle position
sensor
(Power source)
or When turning ignition switch to “ON”. 4.5 - 5.5V
When turning ignition switch to
“OFF”.0V
34 W/GPNP switch “D”
position
and When setting selector lever to “D”
position.Battery voltage
When setting selector lever to other
positions.0V
35 L/WPNP switch “R”
positionWhen setting selector lever to “R”
position.Battery voltage
When setting selector lever to other
positions.0V
36 GPNP switch “N” or
“P” positionWhen setting selector lever to “N” or
“P” position.Battery voltage
When setting selector lever to other
positions.0V
39 *2 L/OREngine speed sig-
nal
and Refer to EC-479, "
ECM INSPEC-
TION TABLE" (QR25DE) or EC-
1166, "ECM INSPECTION TABLE"
(QR20DE).—
40 L/BVehicle speed
sensorWhen moving vehicle at 2 to 3 km/h
(1 to 2 MPH) for 1 m (3 ft) or more.Voltage varies
between less
than 0V and
more than 4.5V
41 W/RThrottle position
sensorWhen depressing accelerator pedal
slowly after warming up engine.
(Voltage rises gradually in response
to throttle position.)Fully-closed
throttle: 0.5V
Fully-open throt-
tle: 4V
42 BThrottle position
sensor
(Ground)———
45 P Stop lamp switchWhen depressing brake pedal. Battery voltage
When releasing brake pedal. 0V
47 BRA/T fluid tempera-
ture sensorWhen ATF temperature is 20°C
(68°F).1.5V
When ATF temperature is 80°C
(176°F).0.5V
48 B/W Ground — — — Te r m i -
nal No.Wire color Item ConditionJudgementstan-
dard(Approx.)
AT-312
[EXC.F/EURO-OBD]
TROUBLE DIAGNOSES FOR SYMPTOMS
O/D OFF Indicator Lamp Does Not Come On
ECS004V2
SYMPTOM:
O/D OFF indicator lamp does not come on for about 2 seconds
when turning ignition switch to “ON”.
1. CHECK TCM POWER SOURCE
1. Turn ignition switch to “ON” position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
3. Turn ignition switch to “OFF” position.
4. Check voltage between TCM terminal 28 and ground.
OK or NG
OK >> GO TO 2.
NG >> Check the following items:
●Harness for short or open between ignition switch and
TCM terminals 10, 19 and 28
●Refer to AT-350, "Wiring Diagram — AT — MAIN" .
●Ignition switch and fuse. Refer to PG-2, "POWER SUPPLY ROUTING" .
2. CHECK TCM GROUND CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Disconnect TCM harness connector.
3. Check continuity between TCM terminals 25, 48 and ground.
If OK, check harness for short to ground and short to power.
OK or NG
OK >> GO TO 3.
NG >> Repair open circuit or short to ground or short to power
in harness or connectors. Refer to AT- 3 5 0 , "
Wiring Dia-
gram — AT — MAIN" .
SCIA0765E
Voltage: Battery voltage
Voltage: Battery voltage
SCIA0713E
Continuity should exist.
SCIA0766E
TROUBLE DIAGNOSES FOR SYMPTOMS
AT-313
[EXC.F/EURO-OBD]
D
E
F
G
H
I
J
K
L
MA
B
AT
3.CHECK LAMP CIRCUIT
1. Turn ignition switch to “OFF” position.
2. Check resistance between TCM terminals 13 and 10, 19.
3. Reinstall any part removed.
OK or NG
OK >> GO TO 4.
NG >> Check the following items:
●O/D OFF indicator lamp.
Refer to DI-10, "
Meter/Gauge Operation and Odo/Trip
Meter Segment Check in Diagnosis Mode" .
●Harness and fuse for short or open between ignition
switch and O/D OFF indicator lamp
Refer to PG-2, "
POWER SUPPLY ROUTING" .
●Harness for short or open between O/D OFF indicator lamp and TCM.
4.CHECK SYMPTOM
Check again.
OK or NG
OK >>INSPECTION END
NG >> 1. Perform TCM input/output signal inspection.
2. If NG, recheck TCM pin terminals for damage or loose connection with harness connector. Resistance: 50 - 100Ω
SCIA0767E