heater SSANGYONG KORANDO 2013 Owner's Guide

6810-00
5. PTC HEATER OPERATION PROCESS
1) PTC Heater Input/Output Factors
The engine ECU controls the PTC (Positive Temperature Coefficient) heater system by adjusting the
power supplied to the PTC system according to the two measured temperature values from the engine
coolant temperature sensor and HFM sensor. This system is mounted to the heater air outlet in the air
condition system module and heats the air which flows to the passenger room. Since the PTC system is
heated by the electrical power, the electric load and alternator capacity is greater than the conventional
one. The PTC is not operated when a) the engine is cranking, b) the battery voltage is below 11 V, c) the
glow plug is being preheated.
The ceramic PTC features that the resistance rises quickly in a certain temperature range. The PTC
heater has 3 circuits with power of 330 W. While only 1 circuit in the PTC heater is connected during
PTC1 operation, 2 circuits are connected during PTC2 or PTC3 operation.

2) Control Condition For PTC Heater
Operation Operating condition PTC heater status
HI mode operation
(PTC2, 3)PTC heater operates in
"HIGH" mode if operating
conditions are met
LO mode operation
(PTC1)PTC heater operates in
"LOW" mode if operating
conditions are met
Conditions for
deactivating
Air conditioner blower switch OFF
When the ambient temperature sensor is
faulty (short or open circuit in the wiring)
Engine is cranking
Battery voltage is 11 V or less
Glow plug is being preheated (Glow indicator
comes on) -
-
-
-
-
-
-
-
-
Conditions for PTC heater "LOW" operation mode (2nd step)

(3) Connector pin description
Seat heated wire and
ventilation unit side
Seat heated wire and
ventilation unit wiring side Pin No. Function
1IGN2
2-
3-
4 Ventilation switch
5 Heater switch (LH)
6 Heater switch (RH)
7 Heater level 1 (LH)
8 Heater level 1 (RH)
9 Ventilation level 1 (LH)
10 Heater back (LH) NTC -
11 Heater back (RH) NTC +
12 Cushion ventilation power (+)
13 Heater back (LH) HTR
14 ALT
15 -
16 -
17 -
18 -
19 -
20 Heater level 2 (LH)
21 Heater level 2 (RH)
22 Ventilation level 2 (LH)
23 Heater back (LH) NTC +
24 Heater back (RH) NTC -
25 Heater back (RH) HTR
26 Ground

5110-01
Center fascia lower panel
The design of center fascia lower panel has been
changed (lower tray, heater and A/C control
assembly).
Center fascia panel & molding, RH side fascia panel & molding
- The design of center fascia panel & molding has been changed.
- The design of RH side fascia panel & molding has been changed.
- RH center fascia panel has been newly applied.
RH glove box housing
extension
RH glove box housing extension panel
has been newly added on the right side
of glove box housing.
Center fascia panel
RH side fascia panel
Center fascia molding
RH side fascia
molding
LH and RH center fascia panels
RH side fascia panel
Center fascia moldingRH side fascia molding
Crash pad upper cover
The name of crash pad upper tray has been
changed to "crash pad upper cover" and its
design also has been changed.