## EGR System

#### DTC Troubleshooting (cont'd)

11-455

9. Turn the ignition switch OFF.

10. Turn the ignition switch ON (II).
11. Measure voltage between the EGR valve 6P connector terminals No. 2 and No. 3.

EGR VALVE 6P CONNECTOR

Wire side of female terminals

Is there about 5 V?

YES | - Go to step 13.
NO | - Go to step 12.

12. Measure voltage between ECM/PCM connector terminals A10 and A20.

ECM/PCM CONNECTOR A (31P)

Wire side of female terminals

Is there about 5 V?

YES | - Repair open in the wire between the EGR valve and the ECM/PCM (A10, A20).
NO | - Substitute a known-good ECM/PCM and recheck (see page 11-313). If symptom/indication goes away, replace the original ECM/PCM.

13. Turn the ignition switch OFF.

14. At the sensor side, measure resistance between the EGR valve 6P connector terminals No. 1 and No. 2.

EGR VALVE 6P CONNECTOR

Terminal side of male terminals

Is there continuity or resistance of 100 kohms or higher?

YES | - Replace the EGR valve.
NO | - Go to step 15.

15. Measure resistance between the EGR valve 6P connector terminals No. 1 and No. 3.

EGR VALVE 6P CONNECTOR

Terminal side of male terminals

Is there 100 kohms or higher?

YES | - Replace the EGR valve.
NO | - Go to step 16.

16. Reconnect the EGR valve connector.
17. Turn the ignition switch ON (II).