Subaru Impreza 2003 Service Manual page 1685

TRANSMISSION CONTROL MODULE (TCM) I/O SIGNAL
Content
Shift solenoid 2
Line pressure duty solenoid
Lock-up duty solenoid
Transfer duty solenoid
(SOHC model)
Transfer duty solenoid
(DOHC turbo model)
2-4 brake duty solenoid
2-4 brake timing solenoid
Low clutch timing solenoid
HOLD switch
POWER switch
POWER indicator light
FWD switch
FWD indicator light
ABS signal
Sensor ground line 1
Sensor ground line 2
System ground line
Sensor ground line 3
Sensor ground line 4
AT diagnosis signal
Check with ignition switch ON.
Connector
Terminal No.
No.
B54 5
B54 9
B54 7
B54 6
B56 6
B54 18
B54 16
B54 15
B55 16
B55 23
B56 11
B55 20
B56 2
B55 21
B54 20
B55 9
B56 19
B54 21
B54 10
B54 19
B56 21
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Measuring conditions
1st or 2nd gear
3rd or 4th gear
Ignition switch ON (with
engine OFF)
Throttle fully closed after
warm-up.
Ignition switch ON (with
engine OFF)
Throttle fully open after
warm-up.
When lock up occurs.
When lock up is released.
Fuse on FWD switch
Fuse removed from FWD
switch (with throttle fully
open and with select lever
in 1st gear).
Throttle fully closed.
Throttle fully open.
Throttle fully closed (with
engine OFF) after warm-
up.
Throttle fully open (with
engine OFF) after warm-
up.
1st gear
3rd gear
2nd gear
4th gear
HOLD switch ON
HOLD switch OFF
POWER switch ON
POWER switch OFF
Light ON
Light OFF
Fuse removed.
Fuse installed.
Fused ON FWD switch
Fuse removed from FWD
switch.
ABS switch ON
ABS switch OFF
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Ignition switch ON
4AT-15
Resistance
Voltage (V) to body
(ohms)
More than 9
10 — 16
Less than 1
1.5 — 4.0
2.0 — 4.5
Less than 0.5
More than 8.5
10 — 17
Less than 0.5
More than 8.5
10 — 17
Less than 0.5
More than 8.5
10 — 17
Less than 0.5
1.5 — 5.0
2.0 — 4.5
Less than 0.5
Less than 1
10 — 16
More than 9
Less than 1
10 — 16
More than 9
Less than 1
More than 8
Less than 1
More than 10
Less than 1
More than 9
6 — 9.1
Less than 1
Less than 1
More than 9
Less than 1
6.5 — 15
0 Less than 1
0 Less than 1
0 Less than 1
0 Less than 1
0 Less than 1
Less than 1 ←
→ More than 4
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