ENGINE (DIAGNOSTICS)(H4DOTC) > Diagnostic Procedure with Diagnostic Trouble Code (DTC)

DTC P0503 VEHICLE SPEED SENSOR “A” INTERMITTENT/ERRATIC/HIGH

DTC DETECTING CONDITION:

Immediately at fault recognition

CAUTION:

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

WIRING DIAGRAM:

• LHD model

• RHD model

STEPCHECKYESNO

1.CHECK SPEEDOMETER OPERATION IN COMBINATION METER.

Does the speedometer operate normally?

Check the speedometer.

2.CHECK HARNESS BETWEEN ECM AND COMBINATION METER CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from the combination meter.

3) Measure the resistance between ECM and combination meter.

Connector & terminal

(B136) No. 13 — (i10) No. 12:

Is the resistance less than 10 Ω?

Repair the poor contact of ECM connector.

Repair the harness and connector.

NOTE:

In this case, repair the following item:

• Open circuit of harness between ECM and combination meter connector

• Poor contact in ECM connector

• Poor contact in combination meter connector

• Poor contact of coupling connector