DTC P0607 - Control Module Performance -

DTC DETECTING CONDITION:
- Immediately at fault recognition
- GENERAL DESCRIPTION < Ref. to DTC P0605 - INTERNAL CONTROL MODULE READ ONLY MEMORY (ROM) ERROR - , Diagnostic Trouble Code (DTC) Detecting Criteria > and < Ref. to DTC P0607 - CONTROL MODULE PERFORMANCE - , Diagnostic Trouble Code (DTC) Detecting Criteria. >
TROUBLE SYMPTOM:
- Erroneous idling
- Poor driving performance

CAUTION: After repair or replacement of faulty parts, conduct Clear Memory Mode < Ref. to OPERATION , CLEAR MEMORY MODE > and INSPECTION MODE < Ref. to OPERATION , INSPECTION MODE. >

WIRING DIAGRAM:

Fig 1: Control Module Wiring Diagram
Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSTIC PROCEDURE

Step	Check	Yes	No
1 CHECK INPUT VOLTAGE OF ECM Turn the ignition switch to ON. Measure the voltage between ECM connector and ground. Connector & terminal (B135) No. S (+) - Chassis ground (-): (B135) No. 6 (+) - Chassis ground (-):	Is the measured value within 10 to 13 V?	Go to step 2.	Repair the open circuit or ground short of power supply circuit.
2 CHECK INPUT VOLTAGE OF ECM Start the engine. Measure the voltage between ECM connector and ground. Connector & terminal (B135) No. 5 (+) - Chassis ground (-): (B135) No. 6 (+) - Chassis ground (-):	Is the measured value within 13 to 15 V?	Go to step 3.	Repair the open circuit or ground short of power supply circuit.
3 CHECK GROUND HARNESS OF ECM Measure the voltage between ECM connector and ground. Connector & terminal (B137) No. 1 (+) - Chassis ground (-): (B137) No. 2 (+) - Chassis ground (-):	Is the measured value less than 1 V?	Repair poor contact of ECM connector. If poor contact occur, replace the ECM.	Retighten the engine ground terminal.