Civic L4-1668cc 1.7L SOHC MFI (2003)
YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the
symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
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 OBD II
scan tool/Honda PGM Tester and go to the DTC Troubleshooting index. See: Testing and Inspection/Diagnostic Trouble Code Descriptions
10. Turn the ignition switch OFF.
11. Disconnect ECM/PCM connector E (31P). Make sure the OBD II scan tool or Honda PGM Tester is disconnected from the DLC.
12. Turn the ignition switch ON (II).
13. Measure voltage between DLC terminals No.5 and No.7.
Is there 0 V?
YES - Update the ECM/PCM if it does not have the latest software, or substitute a known-good ECM/PCM, then recheck. If the
symptom/indication goes away with a known-good ECM/PCM, replace the original ECM/PCM.
NO - Repair short to power in the wire between the DLC terminal No.7 and the ECM/PCM (E23). After repairing the wire, check the DTC with
the OBD II scan tool/Honda PGM Tester, and go to the DTC Troubleshooting index. See: Testing and Inspection/Diagnostic Trouble Code
Descriptions
