S2000 L4-2.2L (2004)
Data Link Connector: Testing and Inspection
DLC Circuit Troubleshooting
If the ECM does not communicate with a scan tool, HDS or 1/M test equipment, do this troubleshooting procedure.
1. Measure voltage between DLC terminal No. 16 and body ground.
Is there battery voltage?
YES - Go to step 2.
NO - Repair open in the wire between DLC terminal No.8 and the ACGS (15 A) fuse in the under-hood fuse/relay box.
2. Measure voltage between DLC terminals No. 4 and No.16.
Is there battery voltage?
YES - Go to step 3.
NO - Repair open in the wire between DLC terminal No. 8 and body ground (G401).
3. Measure voltage between DLC terminals No. 5 and No.16.
Is there battery voltage?
YES - Go to step 4.
NO - Repair open in the wire between DLC terminal No. 8 and body ground (G101).
4. Turn the ignition switch ON (II).
