Subaru Legacy 2002 Service Manual page 1783

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL
Automatic Transmission (Diagnostics)
Content
VDC communication signal
+
VDC communication signal
–
Kick-down switch
AT OIL TEMP warning light
Throttle position sensor
Throttle position sensor
power supply
ATF temperature sensor
Rear vehicle speed sensor
Front vehicle speed sensor
Torque converter turbine
speed sensor
Vehicle speed output signal
Engine speed signal
Cruise set signal
Torque control signal 1
Torque control signal 2
Torque control cut signal
Intake manifold pressure
signal
Shift solenoid 1
Shift solenoid 2
Check with ignition switch ON.
Con-
nector Terminal No.
No.
B56 9
B56 18
B55 11
B56 10
B54 3
B54 2
B54 11
B55 24
B55 18
B55 8
B56 17
B55 17
B55 22
B56 5
B56 14
B55 10
B54 1
B54 22
B54 5
Measuring conditions
Ignition ON
Throttle fully opened.
Throttle fully closed.
Light ON
Light OFF
Throttle fully closed.
Throttle fully open.
Ignition switch ON (With
engine OFF)
ATF temperature 20°C
(68°F)
ATF temperature 80°C
(176°F)
Vehicle stopped.
Vehicle speed at least 20
km/h (12 MPH)
Vehicle stopped.
Vehicle speed at least 20
km/h (12 MPH)
Engine idling after warm-
up. (D range)
Engine idling after warm-
up. (N range)
Vehicle speed at most 10
km/h (6 MPH)
Ignition switch ON (with
engine OFF)
Ignition switch ON (with
engine ON)
When cruise control is set
(SET lamp ON)
When cruise control is not
set (SET lamp OFF)
Ignition switch ON (with
engine ON)
Ignition switch ON (with
engine ON)
Ignition switch ON
Engine idling after warm-
up.
1st or 4th gear
2nd or 3rd gear
1st or 2nd gear
3rd or 4th gear
AT-14
Resistance to
Voltage (V)
body (ohms)
(+) — (–)
Plus signal
(+) — (–)
Plus signal
Less than 1
More than 6.5
Less than 1
More than 9
0.3 — 0.7
4.0 — 4.6
4.8 — 5.3
1.6 — 2.0 2.1 k — 2.9 k
0.4 — 0.9 275 — 375
0
450 — 650
More than 1 (AC range)
0
450 — 650
More than 1 (AC range)
0
450 — 650
More than 1 (AC range)
Less than 1←
→More than 4
More than 10.5
8 — 11
Less than 1
More than 6.5
More than 4
More than 4
8
1.2 — 1.8
More than 9
Less than 1
More than 9
Less than 1
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10 — 16
10 — 16