S2000 L4-1997cc 2.0L DOHC (VTEC) MFI (2001)
26. Check for continuity between body ground and Data Link Connector (DLC) (16P) terminal No.15.
Is there continuity?
YES - Repair short in the wire between the DLC and the ECM (A21).
NO - Go to step 27.
27. Turn the ignition switch ON (II).
28. Measure voltage between ECM connector terminal A10 and body ground.
Is there about 5 V?
YES - Go to step 29.
NO - Repair short in the wire between the DLC and the ECM (A10).
29. Turn the ignition switch OFF.
30. Disconnect ECM connector A (32P).
31. Reconnect the negative cable to the battery.
32. Turn the ignition switch ON (II).
Is the MIL on?
YES - Repair short in the wire between the gauge assembly and the ECM (A18).
NO - Substitute a known-good ECM and recheck. If the symptom/indication goes away, replace the original ECM.