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BF135A•BF150A
5-63
5. MIL power supply line check
-1. Turn the ignition switch OFF and disconnect the fuse
box 3P connector.
-2. Turn the ignition switch ON.
Measure the voltage
between the No. 2 (Yellow/Red) terminal of the fuse
box side 3P connector and the engine ground.
Is there the battery voltage?
YES –
Go to the step 3.
NO –
PGM-FI main relay is faulty.
-3. Turn the ignition switch OFF and connect the fuse box
3P connector.
-4. Disconnect the MIL 6P connector.
-5. Turn the ignition switch ON.
Measure the voltage
between the No. 6 (Yellow/Red) terminal of the MIL
harness side 6P connector and the engine ground.
Is there the battery voltage?
YES –
Perform “6. Alternator indicator light check”.
NO –
Repair open in the main wire harness.
6. Alternator indicator light check
-1. Turn the ignition switch ON and check the alternator
indicator light.
Does the alternator indicator light come ON?
YES –
Perform “7. MIL ON line check”.
NO –
Replace the MIL.
7. MIL ON line check
-1. Turn the ignition switch OFF and connect the test har-
ness.
-2. Connect the test harness B-25 terminal to the engine
ground to short-circuit. Turn the ignition switch ON and
check the MIL.
Does the MIL come ON?
YES –
Substitute a known-good ECM and recheck.
NO –
Repair open in the main harness wire
between the MIL and the ECM.
FUSE BOX SIDE 3P
CONNECTOR
VIEWED FROM THE TERMINAL SIDE
MIL HARNESS SIDE
6P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
B-25
YELLOW/RED
YELLOW/RED