Cable Colours / Cable Cross-Sections; Connector And Pins - Webasto Thermo Top Pro 120 Workshop Manual

X4 12-pin plug connection. Vehicle-specific wiring harness
X5 3-pin plug connection. Item ISG to item A2
X6 3-pin plug connection. Item CAF to item A2
X7 2-pin plug connection. Item FH to item A2
X8 2-pin plug connection. Item FV to item A2
X9 4-pin plug connection. To item P or S4 or to A4 or to P
or to S4
X10 W-bus connection control element / diagnosis (do not
connect for analogue connection)
X12 4-pin plug connection W-bus, connection SmartCon-
trol / MultiControl, UniControl, ThermoCall or diagnosis
X15 4-pin plug connection. W-bus temperature sensor con-
nection
X16 4-pin plug connection. To item A5 (optional)
X17 12-pin plug connection. To item A4 (see ThermoCall
documentation)
X19 HF plug connection FAKRA (for TC4 Advanced only)
X20 To item S4 or analogue SmartControl / MultiControl
connection or analogue ThermoCall
(do not connect for W-bus connection)
X21 4-pin plug connection. To Item S4
X22 6-pin plug connection. Telestart connection (optional,
see Telestart documentation)
X26 4-pin plug connection. To Item P
X27 4-pin plug connection. To Item P
X28 4-pin plug connection -
X29 4-pin plug connection -
X31 10-pin plug connection. To Item P1
Y2 Solenoid valve / pump, auxiliary drive / pumping device
10.3.2 Comments
No. Remarks
1 D+ signal (vehicle motor ON/OFF) for determining the
control temperature
3 Fuse for vehicle blower (fuse present in vehicle)
4 Switch for vehicle blower
6 Wiring harness
10 SmartControl/MultiControl connection, Telestart (12 V
only), ThermoCall or diagnostics via W-bus
11 SmartControl / MultiControl connection or switch (ana-
logue)
17 Positive from terminal 15/75 to connection 10: Continu-
ous heating mode is possible in connection with quick
heating function provided the ignition is switched on.
18 Connection to terminal 30: Continuous heating mode is
possible with ignition switched off.
10.4

Cable colours / cable cross-sections

Line length
Cable cross-sections (Wiring
diagram based on < 7.5 m)
9039412C Workshop manual TTP 120 _ 150
< 7.5 m 7.5 – 15 m
0.5 mm² 1.0 mm²
1.0 mm² 1.5 mm²
1.5 mm² 2.5 mm²
2.5 mm² 4.0 mm²
Line length
Cable colours
bl blue
br brown
ge yellow
gn green
gr grey
10.5

Connector and pins

10.5.1 Overview of pin assignment on the
connectors
X1: Coolant pump connection
1 Earth-
2 PWM control input
3 Plus+
6 -
X2: Heater power supply
1 Battery +
2 Battery -
X3: Connection for temperature
sensors and exhaust gas sensor
1 + 2 Coolant sensor
3 + 4 Exhaust gas temperature sensor
5 + 6 Overheat sensor
X4: Control element(s), vehicle con-
nection
1 Input, switch-on signal (ON/OFF)
2 W-bus
3 Terminal D+
4 Auxiliary drive
5 Output, vehicle fan relay
6 Output, battery disconnector afterrunning
signal
7 Operating indicator/error code output
8 Use of residual heat input (on/off)
9 CAN Low (diagnosis)
10 CAN High (diagnosis)
11 CAN Shield (diagnosis)
12 External activation of coolant pumps
X10
1 W-bus
2 Not used
3 Battery +
4 Battery -
Electrical incorporation | 10
< 7.5 m 7.5 – 15 m
4.0 mm² 6.0 mm²
or orange
rt red
sw black
vi violet
ws white
X20
1 Status (LED)
2 Switch input
3 Battery +
4 Battery -
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