Subaru Legacy 2004 Service Manual page 1018

Diagnostic Procedure with Diagnostic Trouble Code (DTC)
Step
8 CHECK ACCELERATOR POSITION SEN-
SOR.
Measure the resistance of accelerator position
sensor.
Terminals
No. 1 — No. 6:
9 CHECK ACCELERATOR POSITION SEN-
SOR.
Measure the resistance of accelerator position
sensor without depressing the accelerator
pedal.
Terminals
No. 5 — No. 4:
10 CHECK ACCELERATOR POSITION SEN-
SOR.
Measure the resistance of accelerator position
sensor without depressing the accelerator
pedal.
Terminals
No. 2 — No. 6:
11 CHECK ACCELERATOR POSITION SEN-
SOR.
Measure the resistance of accelerator position
sensor with the accelerator pedal depressed.
Terminals
No. 5 — No. 4:
12 CHECK ACCELERATOR POSITION SEN-
SOR.
Measure the resistance of accelerator position
sensor with the accelerator pedal depressed.
Terminals
No. 2 — No. 6:
13 CHECK ACCELERATOR POSITION SEN-
SOR OUTPUT.
1) Turn the ignition switch to OFF.
2) Connect all the connectors.
3) Turn the ignition switch to ON.
4) Read the data of main throttle sensor signal
and sub accelerator position sensor signal
using Subaru Select Monitor.
14 CHECK POOR CONTACT.
Check poor contact in connector between
ECM and accelerator position sensor.
15 CHECK HARNESS BETWEEN ECM AND AC-
CELERATOR POSITION SENSOR.
1) Turn the ignition switch to OFF.
2) Disconnect the connector from ECM.
3) Disconnect the connector from accelerator
position sensor.
4) Measure the resistance between ECM con-
nector and accelerator position sensor connec-
tor.
Connector & terminal
(B136) No. 34 — (B315) No. 4:
(B136) No. 35 — (B315) No. 6:
Check
Is the resistance 0.75 — 3.15
k!?
Is the resistance 0.2 — 0.8
k!?
Is the resistance 0.15 — 0.63
k!?
Is the resistance 0.5 — 2.5
k!?
Is the resistance 0.28 — 1.68
k!?
Is the voltage less than 4.8 V? Go to step 14.
Is there poor contact?
Is the resistance less than 1
!?
EN(H4SO 2.5)(diag)-259
ENGINE (DIAGNOSTICS)
Yes
Go to step 9. Replace the accel-
erator position
sensor.
Go to step 10. Replace the accel-
erator position
sensor.
Go to step 11. Replace the accel-
erator position
sensor.
Go to step 12. Replace the accel-
erator position
sensor.
Go to step 13. Replace the accel-
erator position
sensor.
Go to step 15.
Repair the poor Go to step 19.
contact.
Go to step 16. Repair the open
circuit of harness
connector.
No