ENGINE CONTROL SYSTEM 3-27
SELF-DIAGNOSTIC SYSTEM
The self-diagnostic system alerts the operator when an abnor-
mality occurs in a signal from the sensor, switch, etc.
When the system is activated, the “CHECK ENGINE” lamp flashes
(lights intermittently) according to each code pattern along with
a buzzer sound.
When the engine is running, the buzzer sounds a series of short
(0.2 sec.) beeps.
When the engine is not running, the buzzer sounds according to
each code pattern, but not simultaneous with the lamp flash. The
buzzer sound, activated by the self-diagnostic system, can be
temporally canceled by pushing the ignition key in. (Remote con-
trol model only)
NOTE:
On the tiller handle model, alerts is signaled by a sound sequence
only from the buzzer contained in the tiller handle.
PRIORITY/CODE/PATTERN FOR SELF-DIAGNOSTIC SYSTEM OPERATION
PRIORITY
FAILED ITEM
CODE
LAMP FLASHING PATTERN
FAIL-SAFE SYSTEM
ACTIVE
1
MAP sensor 1
3 – 4
on
off
YES
2
CKP sensor
4 – 2
on
off
YES
3
IAC valve / By-pass air
screw adjustment
3 – 1
on
off
N O
4
CMP sensor
2 – 4
on
off
YES
5
CTP switch
2 – 2
on
off
N O
6
Cylinder temp. sensor
1 – 4
on
off
YES
7
IAT sensor
2 – 3
on
off
YES
8
MAP sensor 2
(Sensor hose etc.)
3 – 2
on
off
N O
9
1 – 1
on
off
N O
Rectifier & regulator
(Over-charging)
[
NOTE1
]
10
1 – 5
on
off
YES
Exhaust manifold
temp. sensor
MONITOR-TACHOMETER
“CHECK ENGINE” lamp
NO
4 – 3
11
Fuel injector
on
off
