Honda BF135A Manual page 216

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.
FUSE BOX SIDE 3P
CONNECTOR
YELLOW/RED
VIEWED FROM THE TERMINAL SIDE
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.
MIL HARNESS SIDE
6P CONNECTOR
VIEWED FROM THE TERMINAL SIDE
Is there the battery voltage?
YES – Perform "6. Alternator indicator light check".
NO – Repair open in the main wire harness.
5-63
6. Alternator indicator light check
-1. Turn the ignition switch ON and check the alternator
7. MIL ON line check
-1. Turn the ignition switch OFF and connect the test har-
-2. Connect the test harness B-25 terminal to the engine
YELLOW/RED
indicator light.
Does the alternator indicator light come ON?
YES – Perform "7. MIL ON line check".
NO – Replace the MIL.
ness.
ground to short-circuit. Turn the ignition switch ON and
check the MIL.
B-25
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.
BF135A•BF150A