Honda BF135A Manual page 252

Is there the battery voltage?
YES – Go to the step 6.
NO – Blown No.3 (10A) fuse, or faulty ignition
switch, or open in the wire between the PGM-
FI main relay and the ignition switch.
6. Measure the voltage between the No.2 (White/Yellow)
terminal of the harness side 2P connector and the
engine ground.
HARNESS SIDE
2P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
Is there the battery voltage?
YES – Go to the step 7.
NO – Blown No.3 (10A) fuse, or faulty ignition
switch, or open in the wire between the PGM-
FI main relay and the ignition switch.
7. Check for the continuity between the fuse box side 4P
connector and ECM connector terminals:
Fuse Box
4P connector
No.4 (White/ Black)
No.4 (White/ Black)
FUSE BOX SIDE 4P
CONNECTOR
WHITE/BLACK
VIEWED FROM THE TERMINAL SIDE
Is there the continuity?
YES – Go to the step 8.
NO – Blown No.4 (15A) fuse, or open in the wire
between the PGM-FI main relay and the No.4
(15A) fuse, or open in the wire between the
No.4 (15A) fuse and the ECM.
5-99
WHITE/YELLOW
ECM connector C
No.1 (Yellow/Black)
No.5 (Yellow/Black)
ECM CONNECTOR C
IGP2
(YELLOW/BLACK)
IGP2
(YELLOW/BLACK)
8. Check for the continuity between the terminals of the
fuse box harness side 6P connector and ECM con-
nectors A and B:
Fuse Box
6P connector
No.3 (Light green/Red)
Fuse Box
6P connector
No.3 (Light green/Red)
FUSE BOX
HARNESS SIDE
6P CONNECTOR
LIGHT GREEN/
RED
FLR1
(LIGHT GREEN/RED)
VIEWED FROM THE TERMINAL SIDE
Is there the continuity?
YES – Go to the step 9.
NO – Repair open in the wire between the PGM-FI
main relay and the ECM.
9. Turn the ignition switch ON. Measure the voltage
between the terminals of the ECM connector C:
No.1 (Yellow/Black) ( )
No.1 (Yellow/Black) ( )
No.5 (Yellow/Black) ( )
No.5 (Yellow/Black) ( )
ECM CONNECTOR A
VIEWED FROM THE TERMINAL SIDE
Is there the battery voltage?
YES – End of the check (Good)
NO – Replace the PGM-FI main relay.
BF135A•BF150A
ECM connector A
No.13 (Light green/Red)
ECM connector B
No.10 (Light green/Red)
ECM CONNECTOR A
FLR2
(LIGHT GREEN/RED)
ECM CONNECTOR B
No. 2 (Green) ( )
No. 6 (Green/red) ( )
No. 2 (Green) ( )
No. 6 (Green/Red) ( )