ENGINE (DIAGNOSTICS)(H4DO) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0607 CONTROL MODULE PERFORMANCE

DTC DETECTING CONDITION:

Immediately at fault recognition

TROUBLE SYMPTOM:

• Improper idling

• Poor driving performance

CAUTION:

After repairing or replacing the defective part, perform the Clear Memory Mode and Inspection Mode .

WIRING DIAGRAM:

STEPCHECKYESNO

1.CHECK INPUT VOLTAGE OF ECM.

1) Turn the ignition switch to ON.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B136) No. 3 (+) — Chassis ground (−):

(B136) No. 4 (+) — Chassis ground (−):

Is the voltage 10 — 13 V?

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

2.CHECK INPUT VOLTAGE OF ECM.

1) Start the engine.

2) Measure the voltage between ECM connector and chassis ground.

Connector & terminal

(B136) No. 3 (+) — Chassis ground (−):

(B136) No. 4 (+) — Chassis ground (−):

Is the voltage 13 — 15 V?

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

(B135) No. 3 (+) — Chassis ground (−):

(B135) No. 4 (+) — Chassis ground (−):

Is the voltage less than 1 V?

Repair the poor contact of ECM connector. Replace the ECM if defective.

Repair the following item.

• Further tighten the engine ground terminal.

• Poor contact in ECM connector

• Poor contact of coupling connector