Subaru Legacy 2005 Service Manual page 1433

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
1 CHECK ELECTRONIC THROTTLE CON-
TROL RELAY.
1) Turn the ignition switch to OFF.
2) Remove the electronic throttle control relay.
3) Measure the resistance between electronic
throttle control relay terminals.
Terminals
No. 7 — No. 8:
2 CHECK SHORT CIRCUIT OF ELECTRONIC
THROTTLE CONTROL RELAY POWER SUP-
PLY.
1) Turn the ignition switch to ON.
2) Measure the voltage between electronic
throttle control relay connector and chassis
ground.
Connector & terminal
(B362) No. 7 (+) — Chassis ground (
3 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL RE-
LAY.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Measure the resistance between ECM con-
nector and chassis ground.
Connector & terminal
(B135) No. 35 — Chassis ground:
BP:DTC P2109 THROTTLE/PEDAL POSITION SENSOR "A" MINIMUM STOP
PERFORMANCE
NOTE:
For the diagnostic procedure, refer to DTC P2101. <Ref. to EN(H4DOTC)(diag)-183, DTC P2101 THROT-
TLE ACTUATOR CONTROL MOTOR CIRCUIT RANGE/PERFORMANCE, Diagnostic Procedure with Di-
agnostic Trouble Code (DTC).>
Check
Is the resistance more than 1
MΩ?
Is the voltage more than 5 V?
−
):
Is the resistance more than 1
MΩ?
EN(H4DOTC)(diag)-193
ENGINE (DIAGNOSTICS)
Yes
Go to step 2. Replace the elec-
tronic throttle con-
trol relay.
Go to step 3. Repair the power
supply short cir-
cuit of harness
between ECM and
electronic throttle
control relay.
Repair the poor Repair the ground
contact in ECM short circuit of har-
connector. ness between
Replace the ECM ECM and elec-
if defective. <Ref. tronic throttle con-
to FU(H4DOTC)- trol relay.
34, Engine Con-
trol Module
(ECM).>
No