DTC P0607 Control Module Performance: Wiring Diagram

Fig 1: Identifying Control Module Performance - Wiring Diagram

Courtesy of SUBARU OF AMERICA, INC.

DIAGNOSIS PROCEDURE

Step	Check	Yes	No
1 CHECK INPUT VOLTAGE OF ECM. Turn the ignition switch to ON. Measure the voltage between ECM and chassis ground. Connector & terminal (B134) No. 7 (+) - Chassis ground (-): (B135) No. 2 (+) - Chassis ground (-):	Is the voltage 10- 13 V?	Go to step 2.	Repair the open or ground short circuit of power supply circuit.
2 CHECK INPUT VOLTAGE OF ECM. Start the engine. Measure the voltage between ECM and chassis ground. Connector & terminal (B134) No. 7(+) - Chassis ground (-): (B135) No. 2 (+) - Chassis ground (-):	Is the voltage 13 - 15 V?	Go to step 3.	Repair the open or ground short circuit of power supply circuit.
3 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connectors from ECM and electronic throttle control. Measure the resistance of harness between ECM and electronic throttle control connector. Connector & terminal (B134) No. 19 - (E57) No. 5: (B134) No. 29 - (E57) No. 3:	Is the resistance less than 1 Ω?	Go to step 4.	Repair the open circuit of harness between ECM and electronic throttle control connector.
4 CHECK ECM GROUND HARNESS. Measure the voltage between ECM and chassis ground. Connector & terminal (B134) No. 5 - Chassis ground: (B137) No. 1 - Chassis ground: (B137) No. 2 - Chassis ground: (B137) No. 3 - Chassis ground: (B137) No. 7- Chassis ground:	Is the voltage less than 1 V?	Repair poor contact of the ECM connector.	Repair the following item. Open circuit in ground circuit Further tightening of the engine ground terminal Poor contact in ECM connector Poor contact of coupling connector