Cranking Signal: Testing and Inspection

Fig. 23 System checker harness terminal identification:

Exc. 1988 Prelude
1. Connect system checker harness between ECU and wire harness coupler.
2. Turn ignition switch to the start position, then measure voltage between terminal B13 (blue/red (+) and terminal A18 (black/red (-) of system checker harness, Fig. 23. Battery voltage should be present.
3. If battery voltage is not present, check for blown starter signal fuse or open circuit between starter signal fuse and ECU.