Honda SH300 2006 Manual page 493

TROUBLESHOOTING
The immobilizer indicator comes on for approx. two seconds then it goes off, when the ignition switch is
turned ON with the properly registered key and the immobilizer system (HISS) functions normally. If
there is any problem or the properly registered key is not used, the indicator will remains on.
Immobilizer indicator does not come on when the ignition switch is turned ON
1. Fuse Inspection
Check for blown fuse (10 A).
Is the fuse blow?
YES
NO
2. Combination Meter Inspection
Check that the oil pressure indicator comes on with the ignition switch ON.
Does the indicator come on?
YES
NO
3. Combination Meter Power Input line Inspection
Check the power input line (Black/Brown wire) at the combination meter connector (page 22-8).
Is the voltage specified value?
YES
NO
4. Immobilizer Indicator Line Inspection At The ECM Connector
Check the immobilizer indicator line (White/Red wire) at the ECM connector (page 23-12).
Is the voltage specified?
YES
NO
5. Immobilizer Indicator Line Inspection At The Combination Meter Connector
Check the immobilizer indicator line (White/Red wire) at the combination meter connector (page 23-
12).
Is the voltage specified value?
YES
NO
6. ECM Power/Ground Line Inspection
You should hear the IACV and fuel pump hum when the ignition switch ON.
Is the hum heard?
YES
NO
– Replace the fuse
– GO TO STEP 2.
– GO TO STEP 4.
– GO TO STEP 3.
– Faulty combination meter
– • Open circuit in Black/Brown wire
• Open circuit in Green wire
– GO TO STEP 6.
– GO TO STEP 5.
– Faulty combination meter
– Open circuit in White/Red wire
– Replace the ECM with a new one, and recheck
– Inspect the ECM power/Ground line (page 6-65)
IMMOBILIZER SYSTEM (HISS)
23-9