## DLC Circuit Troubleshooting

1. | Turn the ignition switch ON (II).

2. | Measure voltage between data link connector (DLC) terminal No. 16 and body ground. Is there battery voltage? YES - Go to 3. NO - Repair open in the wire between DLC terminal No. 16 and the No. 8 (15A) fuse in the under-hood fuse/relay box.n

3. | Measure voltage between DLC terminals No. 4 and No. 16. Is there battery voltage? YES - Go to 4. NO - Repair open in the wire between DLC terminal No. 4 and body ground.n

4. | Measure voltage between DLC terminals No. 5 and No. 16. Is there battery voltage? YES - Go to 5. NO - Repair open in the wire between DLC terminal No. 5 and ECM/PCM (E3).n

5. | Measure voltage between DLC terminals No. 5 and No. 7. Is there 8.5 V or more? YES - Go to 11. NO - Go to 6.

6. | Turn the ignition switch OFF.

7. | Disconnect the negative cable from the battery.

8. | Disconnect ECM/PCM connector E (31P).

9. | Check for continuity between DLC terminal No. 7 and body ground. Is there continuity? YES - Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n NO - Go to 10.

10. | Check for continuity between DLC terminal No. 7 and ECM/PCM terminal E23. Is there continuity? YES - Substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away with a known-good ECM/ PCM, replace the original ECM/PCM.n NO - Repair open in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n

11. | Turn the ignition switch OFF.

12. | Disconnect the negative cable from the battery.

13. | Disconnect ECM/PCM connector E (31P).

14. | Reconnect the negative cable from the battery.

15. | Turn the ignition switch ON (II).

16. | Measure voltage between DLC terminals No. 5 and No. 7. Is there 0 V? YES - Substitute a known-good ECM/PCM, and recheck. If the symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/ PCM.n NO - Repair short to ground in the wire between DLC terminal No. 7 and the ECM/PCM (E23). After repairing the wire, check the DTC with the scan tool/Honda PGM Tester and go to the DTC Troubleshooting Index.n