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 repairing or replacing the defective part, perform the Clear Memory Mode < Ref. to OPERATION , Clear Memory Mode. > and Inspection Mode < Ref. to PROCEDURE , Inspection Mode. >.

WIRING DIAGRAM:

Fig 1: Control Module Performance - Wiring Diagram

DIAGNOSIS 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. 2 (+) - Chassis ground (-): (B134) No. 7 (+) - 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 connector and ground. Connector & terminal (B135) No. 2 (+) - Chassis ground (-): (B134) No. 7 (+) - 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 the ECM and electronic throttle control. Measure the resistance of harness between ECM and electronic throttle control connector. Connector & terminal (E57) No. 5 - (B134) No. 19: (E57) No. 3 - (B134) No. 29:	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 connect and 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 the poor contact of ECM connector. Replace the ECM if defective. < Ref. to INSTALLATION , Engine Control Module (ECM). >	Further tighten the engine ground terminal.