Checking The Ecm Circuit - SELVA MARINE Blue Whale 250 EFI Service Manual

Ignition and ignition control system / ECM and electronic throttle valve control system
5. Check for continuity between relay termi-
nals 3 and 4. Replace if there is no
continuity.
6. Check that there is no continuity between
relay terminals 3 and 4 after discon-
necting a battery terminal from relay ter-
minal 5 or 6. Replace if there is
continuity.
4
6
CAUTION:
Do not reverse the battery leads.
7. Measure the voltage between the termi-
nal 7 and ground, and the terminal 8
and ground as shown.
DC V
8
7
Terminal 7 – Ground:
Terminal 8 – Ground:
12 V (battery voltage)
8. Turn the engine start switch to ON.
9. Measure the voltage between terminals
8 and 9 as shown.
6P23H11
3
5
S6P28160J
S6P28380J
9
8
Terminal 8–9:
12 V (battery voltage)

Checking the ECM circuit

1. Disconnect the ECM couplers a and b.
2. Check for continuity between the ECM
coupler terminals c (46, 68, 69, 75, 76,
and 84, wiring harness end) and ground.
Check the wiring harness and ground if
there is no continuity.
a
b
a b
c
3. Connect ECM couplers a and b.
1
2
S6P28390
3
4
5
6
S6P28450
7
8
9
S6P28820
8-22