Page 97 of 2395

AAT475A
TCM Terminals and Reference Value=NBAT0027PREPARATIONNBAT0027S01IMeasure voltage between each terminal and terminal 25 or 48
by following ªTCM INSPECTION TABLEº.
SAT217JB
TCM HARNESS CONNECTOR TERMINAL LAYOUTNBAT0027S02TCM INSPECTION TABLENBAT0027S03(Data are reference values.)
Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
1GYLine pressure
solenoid valve
When releasing accelerator pedal after warm-
ing up engine.1.5 - 3.0V
When depressing accelerator pedal fully after
warming up engine.0V
2 BR/YLine pressure
solenoid valve
(with dropping
resistor)When releasing accelerator pedal after warm-
ing up engine.5 - 14V
When depressing accelerator pedal fully after
warming up engine.0V
3 G/ORTorque converter
clutch solenoid
valve
When A/T performs lock-up. 8 - 15V
When A/T does not perform lock- up. 0V
4Ð Ð
ÐÐ
5Ð Ð Ð Ð
6Ð Ð Ð Ð
7Ð Ð Ð Ð
8Ð Ð Ð Ð
9Ð Ð Ð Ð
10 W/R Power sourceWhen turning ignition switch to ªONº.Battery volt-
age
When turning ignition switch to ªOFFº. 0V
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value
AT-92
Page 98 of 2395

Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
11 L/WShift solenoid
valve A
When shift solenoid valve A operates.
(When driving in ªD
1ºorªD4º.)Battery volt-
age
When shift solenoid valve A does not operate.
(When driving in ªD
2ºorªD3º.)0V
12 L/RShift solenoid
valve BWhen shift solenoid valve B operates.
(When driving in ªD
1ºorªD2º.)Battery volt-
age
When shift solenoid valve B does not operate.
(When driving in ªD
3ºorªD4º.)0V
13 GYO/D OFF indica-
tor lamp
When setting overdrive control switch in ªONº
position.Battery volt-
age
When setting overdrive control switch in
ªOFFº position.0V
14 Ð Ð Ð Ð
15 Ð Ð Ð Ð
16 OR/WClosed throttle
position switch
(in throttle posi-
tion switch)When releasing accelerator pedal after warm-
ing up engine.
Refer to ªPreparationº, ªTCM SELF-DIAG-
NOSTIC PROCEDURE (No Tools)º, AT-46.Battery volt-
age
When depressing accelerator pedal after
warming up engine.
Refer to ªPreparationº, ªTCM SELF-DIAG-
NOSTIC PROCEDURE (No Tools)º, AT-46.0V
17 OR/BWide open
throttle position
switch
(in throttle posi-
tion switch)When depressing accelerator pedal more than
half-way after warming up engine.Battery volt-
age
When releasing accelerator pedal after warm-
ing up engine.0V
18 B/YASCD cruise sig-
nal
When ASCD cruise is being performed.
(ªCRUISEº light comes on.)Battery volt-
age
When ASCD cruise is not being performed.
(ªCRUISEº light does not comes on.)0V
19 W/R Power source
Same as No. 10
20 L/BOverrun clutch
solenoid valve
When overrun clutch solenoid valve operates.Battery volt-
age
When overrun clutch solenoid valve does not
operate.0V
21 Ð Ð
ÐÐ
22 GYOverdrive control
switchWhen setting overdrive control switch in ªONº
positionBattery volt-
age
When setting overdrive control switch in
ªOFFº position0V
23 Ð Ð Ð Ð
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont'd)
AT-93
Page 99 of 2395

Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
24 W/GASCD OD cut
signal
When ªACCELº set switch on ASCD cruise is
released.5 - 10V
When ªACCELº set switch on ASCD cruise is
applied.Less than 2V
25 B Ground
Ð0V
26 GPNP switch ª1º
position
When setting selector lever to ª1º position.Battery volt-
age
When setting selector lever to other positions. 0V
27 G/WPNP switch ª2º
positionWhen setting selector lever to ª2º position.Battery volt-
age
When setting selector lever to other positions. 0V
28 R/YPower source
(Memory back-up)
or
When turning ignition switch to ªOFFº.Battery volt-
age
When turning ignition switch to ªONº.Battery volt-
age
29 WRevolution sensor
(Measure in AC
range)
When vehicle cruises at 30 km/h (19 MPH).1V or more
Voltage rises
gradually in
response to
vehicle speed.
When vehicle parks. 0V
30*2 W (RX)
ÐÐ
31*2 L (TX) Ð Ð
32 P/BThrottle position
sensor
(Power source)Ignition switch ªONº. 4.5 - 5.5V
Ignition switch ªOFFº. 0V
33*1 G/R LAN Ð Ð
34 LPNP switch ªDº
position
When setting selector lever to ªDº position.Battery volt-
age
When setting selector lever to other positions. 0V
35 YPNP switch ªRº
positionWhen setting selector lever to ªRº position.Battery volt-
age
When setting selector lever to other positions. 0V
36 PPNP switch ªNº or
ªPº positionWhen setting selector lever to ªNº or ªPº posi-
tion.Battery volt-
age
When setting selector lever to other positions. 0V
37 Ð Ð Ð Ð
38 WTurbine revolution
sensor (Measure
in AC range)
When engine is running at 1,000 rpm1.2V
Voltage rises
gradually in
response to
engine speed.
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont'd)
AT-94
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Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
39 W/BEngine speed
signal
Refer to EC-127, ªECM INSPECTION
TABLEº.Ð
40 W/LVehicle speed
sensor
When moving vehicle at 2 to 3 km/h (1 to 2
MPH) for1m(3ft)ormore.Voltage varies
between less
than 1.0V and
more than
4.5V.
41 PThrottle position
sensor
When depressing accelerator pedal slowly
after warming up engine.
(Voltage rises gradually in response to throttle
position.)Fully-closed
throttle:
0.5V - 0.7V
Fully-open
throttle:
4V
42 BThrottle position
sensor
(Ground)Ð0V
45 G/Y Stop lamp switchWhen depressing brake pedalBattery volt-
age
When releasing brake pedal 0V
46 WTransfer control
unitÐÐ
47 RA/T fluid tempera-
ture sensorWhen ATF temperature is 20ÉC (68ÉF). 1.5V
When ATF temperature is 80ÉC (176ÉF). 0.5V
48 B Ground
Ð0V
*1: These terminals are connected to the ECM.
*2: These terminals are connected to the Data link connector for CONSULT-II.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS Ð GENERAL DESCRIPTION
TCM Terminals and Reference Value (Cont'd)
AT-95
Page 101 of 2395
Wiring Diagram Ð AT Ð MAINNBAT0185
MAT907A
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram Ð AT Ð MAIN
AT-96
Page 102 of 2395
TCM TERMINALS AND REFERENCE VALUENBAT0185S01Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
10 W/R Power source
When turning ignition switch to ªONº.Battery volt-
age
When turning ignition switch to ªOFFº. 0V
19 W/R Power source Same as No. 10
25 B Ground
Ð0V
28 R/YPower source
(Memory back-up)
or
When turning ignition switch to ªOFFº.Battery volt-
age
When turning ignition switch to ªONº.Battery volt-
age
48 B Ground
Ð0V
Diagnostic ProcedureNBAT0223
1 CHECK TCM POWER SOURCE STEP 1
1. Turn ignition switch to ON position.
(Do not start engine.)
2. Check voltage between TCM terminals 10, 19, 28 and ground.
SAT611J
OK or NG
OK©GO TO 2.
NG©GO TO 3.
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Wiring Diagram Ð AT Ð MAIN (Cont'd)
AT-97
Page 103 of 2395
2 CHECK TCM POWER SOURCE STEP 2
1. Turn ignition switch to OFF position.
2. Check voltage between TCM terminal 28 and ground.
SAT612JC
OK or NG
OK©GO TO 4.
NG©GO TO 3.
3 DETECT MALFUNCTIONING ITEM
Check the following items:
IHarness for short or open between ignition switch and TCM terminals 10, 19 and 28 (Main harness)
IIgnition switch and 10A or 7.5A fuse [No. 18 or 24, located in the fuse block (J/B)]
Refer to EL-9, ªSchematicº.
OK or NG
OK©GO TO 4.
NG©Repair or replace damaged parts.
4 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. Refer to wiring diagram Ð AT Ð MAIN.
Continuity should exist.
If OK, check harness for short to ground and short to power.
OK or NG
OK©INSPECTION END
NG©Repair open circuit or short to ground or short to power in harness or connectors.
TROUBLE DIAGNOSIS FOR POWER SUPPLY
Diagnostic Procedure (Cont'd)
AT-98
Page 104 of 2395

SAT136K
DescriptionNBAT0028IThe PNP switch assemble includes a transmission range
switch.
IThe transmission range switch detects the selector position
and sends a signal to the TCM.
TCM TERMINALS AND REFERENCE VALUENBAT0028S02Remarks: Specification data are reference values.
Terminal
No.Wire color Item ConditionJudgement
standard
(Approx.)
26 GPNP switch ª1º
position
When setting selector lever to ª1º position.Battery volt-
age
When setting selector lever to other positions. 0V
27 G/WPNP switch ª2º
positionWhen setting selector lever to ª2º position.Battery volt-
age
When setting selector lever to other positions. 0V
34 LPNP switch ªDº
positionWhen setting selector lever to ªDº position.Battery volt-
age
When setting selector lever to other positions. 0V
35 YPNP switch ªRº
positionWhen setting selector lever to ªRº position.Battery volt-
age
When setting selector lever to other positions. 0V
36 PPNP switch ªNº or
ªPº positionWhen setting selector lever to ªNº or ªPº posi-
tion.Battery volt-
age
When setting selector lever to other positions. 0V
ON BOARD DIAGNOSIS LOGICNBAT0028S03
Diagnostic trouble code Malfunction is detected when ... Check item (Possible cause)
: PNP SW/CIRC
TCM does not receive the correct volt-
age signal from the switch based on the
gear position.IHarness or connectors
(The PNP switch circuit is open or
shorted.)
IPNP switch
: P0705
GI
MA
EM
LC
EC
FE
TF
PD
AX
SU
BR
ST
RS
BT
HA
SC
EL
IDX
DTC P0705 PARK/NEUTRAL POSITION SWITCH
Description
AT-99