TOHATSU BFT115A Service Manual page 107

ALERT SYSTEM/WARNING SYSTEM TROUBLESHOOTING
• Perform the MIL initial check before starting the engine.
The warning buzzer can sound when the starter motor speed is extremely low, but the alert system/warning
system is normal if the buzzer stops sounding after starting the engine.
When the warning buzzer keeps sounding after MIL initial check, refer to the following symptom chart and
perform the necessary troubleshooting.
If the symptom is not shown in the following symptom chart, perform a function test according to the
following procedure:
– FUNCTION TEST USING THE HDS (page 4-18)
– FUNCTION TEST WITHOUT USING THE HDS (page 4-19)
SYMPTOM CHART
Condition
Combination switch ON
(MIL initial check)
2 sec. after turning the combination
switch ON
Normal operation
Low oil pressure (page 4-22)
Overheat (page 4-21)
MIL faulty (page 4-23)
Abnormal charging (page 4-23)
Water inside water
strainer (page 4-23)
: ON : OFF
When two or more problems occur at the same time, the warnings for both problems are indicated together.
The prolonged buzzer sound takes precedence over the short buzzer sound.
Example: When problems occur with overheat and abnormal charging at the same time, the oil indicator light and the alternator
indicator light all come on, and the buzzer sounds continuously.
*1: The oil indicator light blinks when a problem with the EOP sensor or MAP sensor occurs at the same time as a MIL malfunc-
tion.
*2: The overheat indicator light blinks when a problem with the ECT sensor occurs at the same time as a MIL malfunction.
Oil indica-
tor light
(Green)
(for 2 sec.)
*1
separator/fuel
Indicator light
Overheat MIL
indicator (Red)
light (Red)
(for 2 sec.) (for 2 sec.)
*2
TROUBLESHOOTING
Alternator Warning
buzzer
indicator
light (Red)
Sounds twice
Stop
Stop
Continuous
sound
Continuous
sound
Intermittent
sound
(Long beep)
Intermittent
sound
(Long beep)
Intermittent
sound
(Short beep)
4-17