Subaru Legacy 2004 Service Manual page 624

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
ENGINE (DIAGNOSTICS)
Step
1 CHECK INPUT SIGNAL FROM ECM.
1) Turn the ignition switch to OFF.
2) Measure the voltage between ECM and
chassis ground.
Connector & terminal
(B136) No. 7 (+) — Chassis ground (
2 CHECK HARNESS BETWEEN ECM AND
MAIN FUSE BOX CONNECTOR.
1) Disconnect the connector from ECM.
2) Measure the resistance of harness
between ECM and chassis ground.
Connector & terminal
(B136) No. 7 — Chassis ground:
3 CHECK FUSE No. 13.
BR:DTC P2100 THROTTLE CONTROL MOTOR CIRCUIT OPEN
NOTE:
Refer to DTC P2101 for diagnostic procedure. <Ref. to EN(H4SO 2.0)(diag)-193, DTC P2101 THROTTLE
ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Diagnos-
tic Trouble Code (DTC).>
Check
Is the voltage more than 10 V? Repair the poor
"
):
Is the resistance less than 10
&?
Is the fuse blown out?
EN(H4SO 2.0)(diag)-192
Yes
Go to step 2.
contact in ECM
connector.
Repair the ground Go to step 3.
short circuit in har-
ness between
ECM connector
and battery termi-
nal.
Replace the fuse. Repair the har-
ness and connec-
tor.
NOTE:
In this case, repair
the following:
• Open circuit in
harness between
ECM and battery
• Poor contact in
ECM connector
• Poor contact in
battery terminal
No