Subaru 2002 IMPREZA Service Manual page 533

DIAGNOSTIC PROCEDURE WITH DIAGNOSTIC TROUBLE CODE (DTC)
Step
2 CHECK CURRENT DATA.
1)Turn the ignition switch to OFF.
2)Repair the battery short circuit in harness
between ECM and rear oxygen sensor con-
nector.
3)Turn the ignition switch to ON.
4)Read the data of rear oxygen sensor heater
current using Subaru Select Monitor or OBD-II
general scan tool.
NOTE:
•Subaru Select Monitor
For detailed operation procedure, refer to the
"READ CURRENT DATA FOR ENGINE".
<Ref. to EN-34, Subaru Select Monitor.>
•OBD-II general scan tool
For detailed operation procedure, refer to the
OBD-II General Scan Tool Instruction Manual.
3 CHECK POOR CONTACT.
Check poor contact in ECM connector.
Check
Is the value more than 7 A?
Is there poor contact in ECM
connector?
EN-101
ENGINE (DIAGNOSTICS)
Yes
Replace the ECM. END
<Ref. to FU-51,
Engine Control
Module.>
Repair the poor END
contact in ECM
connector.
No