DTC P0607 Control Module Performance

DTC DETECTING CONDITION:

Detect as soon as malfunction occurs.
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 , PROCEDURE , Inspection Mode.>.

WIRING DIAGRAM:

Fig 1: DTC P0607 Circuit

Courtesy of SUBARU OF AMERICA, INC.

DTC P0607 DIAGNOSIS

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) No. 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) No. 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

Turn the ignition switch to ON.
Measure the voltage between ECM connector and ground.
Connector & terminal

(B135) No. 5 (+) - Chassis ground (-): (B135) No. 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) No. 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.