Subaru Legacy 2004 Service Manual page 2305

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
AUTOMATIC TRANSMISSION (DIAGNOSTICS)
Step
2 CHECK GROUND CIRCUIT FOR ECM.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance of harness
between ECM and engine ground.
Connector & terminal
2.0 L model and 2.5 L KS, KA model
(B134) No. 2 — Engine ground:
(B134) No. 7 — Engine ground:
(B135) No. 5 — Engine ground:
(B135) No. 6 — Engine ground:
(B136) No. 1 — Engine ground:
(B136) No. 2 — Engine ground:
(B136) No. 5 — Engine ground:
(B136) No. 6 — Engine ground:
(B137) No. 1 — Engine ground:
2.5 L EC, EK, K4 model
(B134) No. 7 — Engine ground:
(B134) No. 6 — Engine ground:
(B135) No. 1 — Engine ground:
(B135) No. 12 — Engine ground:
(B137) No. 1 — Engine ground:
(B137) No. 2 — Engine ground:
(B137) No. 3 — Engine ground:
(B137) No. 7 — Engine ground:
3 CHECK ACCELERATOR PEDAL POSITION
SENSOR.
1) Disconnect the connectors from accelerator
pedal position sensor.
2) Measure the resistance between accelera-
tor pedal position sensor connector recepta-
cle's terminals.
Connector & terminal
No. 1 — No. 6:
4 CHECK ACCELERATOR PEDAL POSITION
SENSOR.
Measure the resistance between accelerator
pedal position sensor connector receptacle's
terminals.
Connector & terminal
No. 2 — No. 6:
5 CHECK HARNESS CONNECTOR BETWEEN
TCM AND ACCELERATOR PEDAL POSI-
TION SENSOR.
1) Disconnect the connector from TCM.
2) Measure the resistance of harness
between TCM connector and chassis ground.
Connector & terminal
(B54) No. 19 — Chassis ground:
Check
Is the resistance less than 5
"?
Is the resistance 0.75 — 3.15
k"?
Is the resistance 0.15 — 0.63
k"?
Is the resistance more than 1
M"?
4AT(diag)-102
Yes
Go to step 3. Repair the open
circuit in harness
between ECM
connector and
engine grounding
terminal.
Go to step 4. Replace the accel-
erator pedal posi-
tion sensor.
Go to step 5. Replace the accel-
erator pedal posi-
tion sensor.
Go to step 6. Repair the short
circuit in harness
between TCM and
accelerator pedal
position sensor
connector.
No