Wiring Diagram:

WARNING: This page is about a different variant/trim than selected.

Fig 1: Wiring Diagram - DTC P0607 Control Module Performance

Courtesy of SUBARU OF AMERICA, INC.

DTC P0607 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. 5 (+) - Chassis ground (-): (B135) 6 (+) - Chassis ground (-):	Is the measured value 10 - 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) 6 (+) - Chassis ground (-):	Is the measured value 13 - 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 (-): (B137) No. 3 (+) - 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.

Step

Check

Yes

1. CHECK INPUT VOLTAGE OF ECM

Is the measured value 10 - 13 V?

Go to step 2.

Repair the open circuit or ground short of power supply circuit.

2. CHECK INPUT VOLTAGE OF ECM

Is the measured value 13 - 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 (-):

(B137) No. 3 (+) - 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.