Subaru Legacy 2002 Service Manual page 1833

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Automatic Transmission (Diagnostics)
G: DTC 45 INTAKE MANIFOLD PRESSURE SIGNAL
DIAGNOSIS:
Input signal circuit of TCM from ECM is open or shorted.
TROUBLE SYMPTOM:
Excessive shift shock.
WIRING DIAGRAM:
No.
1 CHECK ENGINE GROUND TERMINALS
AND GROUND CIRCUIT OF ECM
<Ref. to AT-46, DTC 31 THROTTLE POSI-
TION SENSOR, Diagnostic Procedure with
Diagnostic Trouble Code (DTC).>
2 CHECK HARNESS CONNECTOR
BETWEEN TCM AND ECM.
1) Turn ignition switch to OFF.
2) Disconnect connectors from TCM and
ECM.
3) Measure resistance of harness between
TCM and ECM connector.
Connector & terminal
Except 3.0 L model:
(B54) No. 1 — (B136) No. 11:
3.0 L model:
(B54) No. 1 — (B135) No. 28:
3 CHECK HARNESS CONNECTOR
BETWEEN TCM AND ECM.
Measure resistance of harness between TCM
connector and chassis ground.
Connector & terminal
(B54) No. 1 — Chassis ground:
Step
Is there any trouble?
Is the resistance less than
1 Ω?
Is the resistance more than
1 MΩ?
AT-64
S004521I16
Check Yes
Repair ground
terminal and/or
ground circuit of
ECM.
Go to step 3.
Go to step 4.
B3M2255
No
Go to step 2.
Repair open cir-
cuit in harness
between TCM and
ECM connector.
Repair short cir-
cuit in harness
between TCM and
ECM connector.