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BF135A•BF150A
5-98
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.
8. Check for the continuity between the NO.3 (Light
green/Red) terminal of the fuse box side 6P connector
and the respective terminals of the test harness A-13
and B-10 terminals.
Is there the continuity?
YES –
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 test harness C-1 terminal (+) and the C-
2/C-6 terminals (–), and between the C-5 terminal (+)
and the C-2/C-6 (–) terminals.
Is there the battery voltage?
YES –
End of the check (Good)
NO –
Replace the PGM-FI main relay.
Check without test harness:
1. Turn the ignition switch OFF and disconnect each con-
nector from the PGM-FI main relay.
2. Disconnect the ECM connectors A, B, and C.
3. Check for the continuity between the No.6 (Black) ter-
minal of the harness side 6P connector and the engine
ground.
Is there the continuity?
YES –
Repair short in the wire between the PGM-FI
main relay and the engine ground.
NO –
4. Measure the voltage between the No.3 (White/Yellow)
terminal of the fuse box side 4P connector and the
engine ground.
Is there the battery voltage?
YES –
Go to the step 5.
NO –
Blown No.7 (30A) fuse, or open in the wire
between the fuse box and the PGM-FI main
relay.
5. Turn the ignition switch ON.
Measure the voltage
between the No.2 (Black/Yellow) terminal of the har-
ness side 6P connector and the engine ground.
C-2
C-2
C-6
C-6
C-5
C-1
B-10
A-13
FUSE BOX SIDE
6P CONNECTOR
VIEWED FROM THE
TERMINAL SIDE
FUSE BOX SIDE
4P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
HARNESS SIDE
6P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
PGM-FI MAIN RELAY HARNESS
SIDE 6P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
BLACK
LIGHT GREEN/
RED
WHITE/YELLOW
BLACK/YELLOW