Repair manual

25
Diagnosis
The HYDRONIC electronic control unit can store up to five
faults.
The faults can be read from the control unit and displayed by
one of the following means:
• Flashing code
After connection of an LED and a series resistor (approx.
1 kΩ / 11 W) the function / fault is displayed as a flashing
code.
For details of the flashing code signals and the
corresponding faults, see table on page 26.
• Diagnostic unit
After connection of the diagnostic unit, the function / fault is
shown on the display as a number.
For information regarding the connection and operation of
the diagnostic unit, see page 27.
To connect the diagnostic unit, an adapter cable is
required.
For fault code table, see pages 30 to 33.
• ISO adapter with KD 2000 software
Following installation of the KD 2000 software and
connection of the ISO adapter, the function / fault is shown
as a number on the display.
For information regarding the connection and operation of
the ISO adapter, see page 28.
To connect the ISO adapter, an adapter cable is required.
For fault code table, see pages 30 to 33.
• Modular timer installed in the vehicle
When a modular timer is installed, the function / faults can
be shown as a number on the display.
For information regarding operation of the modular timer,
see page 29.
For fault code table, see pages 30 to 33.
• External diagnostic system
With an external, vehicle-specific diagnostic system
---> consult the vehicle manufacturer.
Cat. No.
diagnostic unit
22 1512 89 00 00
Cat. No.
adapter cable
22 1000 31 66 00
Cat. No.
modular timer
22 1000 30 34 00
LED and series resistor
4 / Troubleshooting
Cat. No.
ISO adapter
22 1524 89 00 00
Cat. No.
adapter cable
22 1000 31 66 00
Drawing 18
Drawing 19
1753
64
8
2
1
2
3
4
5
6
Connector B1
Connector B2
B2
B1
Resistor
Diode
Compartment 5
Compartment 2