Subaru IMPREZA GD 2007 Series Manual page 1620

asieps_tobira_IM_US.book 289 ページ ２０１２年１月１７日 火曜日 午後３時４８分
Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
28 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL.
1) Connect the ECM.
2) Measure the resistance between electronic
throttle control connector and engine ground.
Connector & terminal
(E57) No. 3 — Engine ground:
29 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL.
1) Turn the ignition switch to ON.
2) Measure the voltage between electronic
throttle control connector and engine ground.
Connector & terminal
(E57) No. 6 (+) — Engine ground (–):
(E57) No. 4 (+) — Engine ground (–):
30 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from the ECM.
3) Measure the resistance between ECM con-
nectors.
Connector & terminal
(B134) No. 19 — (B134) No. 18:
(B134) No. 19 — (B134) No. 28:
31 CHECK SENSOR OUTPUT.
1) Connect all connectors.
2) Turn the ignition switch to ON.
3) Read the data of main throttle sensor signal
using Subaru Select Monitor.
NOTE:
For detailed operation procedures, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(STI)(diag)-33, Subaru Select Monitor.>
32 CHECK SENSOR OUTPUT.
Read the data of sub throttle sensor signal
using Subaru Select Monitor.
NOTE:
Subaru Select Monitor
For detailed operation procedures, refer to
"READ CURRENT DATA FOR ENGINE". <Ref.
to EN(STI)(diag)-33, Subaru Select Monitor.>
33 CHECK HARNESS BETWEEN ECM AND
ELECTRONIC THROTTLE CONTROL MOTOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connectors from ECM and
electronic throttle control.
3) Measure the resistance between ECM and
electronic throttle control connector.
Connector & terminal
(B137) No. 5 — (E57) No. 2:
(B137) No. 4 — (E57) No. 1:
Check
Is the resistance less than 5 Ω? Go to step 29.
Is the voltage 4.85 V or more? Repair the short
Is the resistance 1 MΩ or more? Go to step 31.
Is the voltage 0.81 — 0.87 V?
Is the voltage 1.64 — 1.70 V?
Is the resistance less than 1 Ω? Go to step 34.
EN(STI)(diag)-289
ENGINE (DIAGNOSTICS)
Yes No
Repair the harness
and connector.
NOTE:
In this case, repair
the following item:
• Open circuit of
harness between
ECM and engine
ground
• Poor contact in
ECM connector
• Poor contact of
coupling connector
Go to step 30.
circuit to power in
the harness
between ECM and
electronic throttle
control connector.
Repair the short
circuit to power in
the harness
between ECM and
electronic throttle
control connector.
Go to step 32. Repair poor con-
tact of the elec-
tronic throttle
control connector.
Replace the elec-
tronic throttle con-
trol if defective.
<Ref. to
FU(H4DOTC)-16,
Throttle Body.>
Go to step 33. Repair poor con-
tact of the elec-
tronic throttle
control connector.
Replace the elec-
tronic throttle con-
trol if defective.
<Ref. to
FU(H4DOTC)-16,
Throttle Body.>
Repair the open
circuit of harness
between ECM and
electronic throttle
control.