DTC P0607 Control Module Performance

DTC DETECTING CONDITION:

Immediately at fault recognition
GENERAL DESCRIPTION < Ref. to DTC P0607 CONTROL MODULE PERFORMANCE , Diagnostic Trouble Code (DTC) Detecting Criteria. >

TROUBLE SYMPTOM:

Improper 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

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 chassis ground. Connector & terminal (B135) No. 5 (+) - Chassis ground (-): (B135) No. 6 (+) - 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 chassis ground. Connector & terminal (B135) No. 5 (+) - Chassis ground (-): (B135) No. 6 (+) - 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 ECM GROUND HARNESS. Measure the voltage between ECM connector and chassis ground. Connector & terminal (B137) No. 1 (+) - Chassis ground (-): (B137) No. 2 (+) - Chassis ground (-):	Is the voltage less than 1 V?	Repair the poor contact of ECM connector. Replace the ECM if defective. < Ref. to ENGINE CONTROL MODULE (ECM) . >	Further tighten the engine ground terminal.