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 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 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 circuit or ground short of power supply circuit.
2 CHECK INPUT VOLTAGE OF ECM Start the engine. Measure the voltage between ECM connector 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 circuit or ground short of power supply circuit.
3 CHECK HARNESS BETWEEN ECM AND ELECTRONIC THROTTLE CONTROL. Turn the ignition switch to OFF. Disconnect the connector from ECM and electronic throttle control. Measure the resistance of harness between ECM and electronic throttle control. Connector & terminal (E57) No. 5 - (B 134) No. 19: (E57) No. 3 - (B134) No. 29:	Is the resistance less than 1 Ω?	Go to step 4.	Repair the open circuit in harness between ECM and electronic throttle control.
4 CHECK GROUND HARNESS OF ECM Measure the voltage between ECM connector and chassis ground. Connector & terminal (B134) No. 5 (+) - Chassis ground (-): (B136) No. 15 (+) - Chassis ground (-): (B137) No. 7 (+) - Chassis ground (-): (B137) No. 1 (+) - Chassis ground (-): (B137) No. 2 (+) - Chassis ground (-): (B137) No. 3 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Repair poor contact of ECM connector. If faulty, replace the ECM. < Ref. to ENGINE CONTROL MODULE (ECM) . >	Retighten the engine ground terminal.