CHECK HARNESS BETWEEN ECM AND EGR VALVE CONNECTOR.

1) Turn the ignition switch to OFF.

2) Disconnect the connector from EGR valve.

3) Turn the ignition switch to ON.

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

Connector & terminal

DTC P1493; (B134) No. 8 (+) — Chassis ground (−):

DTC P1495; (B134) No. 9 (+) — Chassis ground (−):

DTC P1497; (B134) No. 10 (+) — Chassis ground (−):

DTC P1499; (B134) No. 20 (+) — Chassis ground (−):

QUESTION

Is the voltage 10 V or more?

Yes No

Repair the battery short in harness between ECM and EGR valve connector. After repair, replace the ECM.

Replace the ECM.