Failure Diagnosis; Failure Display And Diagnosis Criteria - Kubota KX91-3a Workshop Manual

WSM Minor Change
g. Failure Diagnosis

1. Failure display and diagnosis criteria

The following table 1 shows data on failure diagnosis, for operating mode and service mode.
Note:
• Display items of the system in service mode can be checked with the fail record.
• In the case of a warning for fuel scarcity, the buzzer will be turned ON for a moment at five-minute inter-
vals.
• No.11 ~ 61 except 31, 32, 51, 52, 53, 54, 55 will be incorporatrd in future version machine, such as auto
idle (AI) model, anxilliary port (AUX) model and anti - theft system model.
Display
Operating mode service mode
1 Fuel -
2 Engine oil 2 Engine oil
3 Charge 3 Charge
4 High voltage 4 High voltage
5 Overheat 5 Overheat
11 Accel sensor 11 Accel sensor
12 Governor sen- 12 Governor
sor sensor
13 AI motor short 13 AImotor short
14 AI motor short 14 AI motor
short
Table 1. Failure diagnosis
Buzzer Lamp Reset method
5-minute Yellow Replenish fuel
intervals
Continu- Red Returns to nor-
ally mal
Momen- Red Returns to nor-
tarily mal
Continu- Red Turn key OFF
ally
Continu- Red 112°C± max.
ally
Momen- Red Turn key OFF
tarily
Momen- Red Turn key OFF
tarily
Momen- Red Turn key OFF
tarily
Momen- Red Turn key OFF
tarily
II Service Engineering Section
Function stop EEPROM
point address
--- ---
--- 66, 86
--- 65, 85
AI AUX 67, 87
AI AUX 77, 97
AI 68, 88
AI 71, 91
AUX 69, 89
AUX 70, 90
II-166
Method of diagnosis
Fuel scarcity rate is 90% min. after
60-s sampling
At 5 V (normal).
The following conditions continue
10 s: oil = L and 800 rpm min.
At 5 V (normal).
The following conditions continue
10 s: charge = L and 800 rpm min.
At 5 V (normal).
A power supply voltage of 18 V
min. continues 3 s.
At 5 V (normal).
The following conditions continue:
Engine revolution of 800 rpm min.
with overheat warning
When the water temperature sen-
sor is normal, a water temperature
of (124 ± ) C min. continues 5 s.
( : Adjustable between -10 C and
+10 C.)
At 5 V (normal).
The accelerator sensor for AI spec-
ifications at 0.25 V max. or 4.75 V
min. continues for 0.2 s.
At 5 V (normal).
The governor sensor for AI specifi-
cations at 0.25 V max. or 4.75 V
min. continues for 0.2 s.
At 5 V (normal).
AI specifications.
The specifications are presently
under consideration.
At 5 V (normal).
AI specifications.
The specifications are presently
under consideration.