Change: Vehicles with new control unit for air conditioning (automatic) as of 09/95 included
Installation instructions
Auxiliary heater 83.2
Model 140 left-hand drive
The auxiliary heater installed under the right- hand front fender is integrated into the coolant circuit of the engine. It serves not only to heat the passenger compartment, but also to warm up the engine to ensure reliable start-up even at extremely low outside temperatures. The auxiliary heater is switched on and off by means of a timer in the passenger compartment. The timer can be used to preselect the start of heating within the next 24 hours, or up to 7 days in advance. | Observe all licensing regulations. In the Federal Republic of Germany, vehicles retrofitted with the auxiliary heater require renewed official approval. The auxiliary heater must not be operated in sealed rooms without waste air extraction or at filling stations. Untreated body parts, e.g. around drilled holes, must be coated with zinc dust paint. |
These installation instructions are divided into the following sections:
A. General work
B. Installing auxiliary heater cable harness and power supply harness for vehicles with automatic climate control
C. Installing auxiliary heater cable harness and power supply harness for vehicles with automatic heater control
D. Installing fuel metering pump/radio remote control cable harness
E. Installing and connecting timer and auxiliary heater control unit
F. Installing and connecting radio remote control for auxiliary heater
G. Installing fuel line and fuel metering pump
H. Installing pipe groups in vehicles with 6-cylinder gasoline engine without rear compartment air conditioner. With rear compartment air conditioner, the pipe groups are installed as standard production.
I. Installing pipe group in vehicles with 6-cylinder diesel engine.
J. Installing pipe group in vehicles with 8-cylinder gasoline engine without rear compartment air conditioner. With rear compartment air conditioner, the pipe groups are installed as standard production.
K. Installing pipe group in vehicles with 12-cylinder gasoline engine without rear compartment air conditioner. With rear compartment air conditioner, the pipe group is installed as standard production.
L. Installing thermostat and switch-over valve in vehicles without rear compartment air conditioner.
M. Installing thermostat and switch-over valve in vehicles with rear compartment air conditioner.
N. Installing heater unit for auxiliary heater
O. Function test
P. Parts ordering note
B. Installing auxiliary heater cable harness and power supply harness for vehicles with automatic climate control
P83-5366-57
Connection diagram for auxiliary heater cable harness in vehicles with automatic climate control
W15/1 | Ground, electronics (right footwell) |
X6 | 3 or 4-pin terminal block, terminal 58d |
X72/1 | 1 or 3-pin connector, auxiliary heater/heating systems for automatic heater, temperature and climate control (HAU, TAU, KLA) |
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
X73/1 | Connector, circulation pump/stationary heater, |
1 | Auxiliary heater cable harness for vehicles with automatic climate control |
B | 10-pin connector, auxiliary heater control unit (N33) |
D | 2-pin connector, auxiliary heater control unit (N33) |
F3-33 | Fuse 33, Terminal 30 |
F3-36 | Fuse 36, Terminal 30 |
N34 | Auxiliary heater timer |
W12 | Ground, center console |
P83-5367-33
Connection diagram for power supply cable harness
P | To fuse holder F3, connection P (1.5 mm2) |
S | To fuse holder F3, connection S |
2 | Power supply cable harness |
N | To fuse holder F3, connection N (2.5 mm2) |
P83-5368-57
Routing and connection of auxiliary heater cable harness and power supply harness
F3 | 35-fuse holder in fuse and relay box F1 |
N34 | Auxiliary heater timer |
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
X73/1 | Connector, circulation pump/stationary heater, |
1 | Auxiliary heater cable harness for vehicles with automatic climate control |
2 | Power supply cable harness with connections |
B | 10-pin connector, auxiliary heater control unit (N33) |
D | 2-pin connector, auxiliary heater control unit (N33) |
P83-5369-61
Routing and connection of auxiliary heater cable harness
X72/1 | 1 or 3-pin connector, auxiliary heater/heating systems for automatic heater, temperature and climate control (HAU, TAU, KLA) |
1 | Auxiliary heater cable harness for vehicles with automatic climate control |
W12 | Ground, center console |
W15/1 | Ground, electronics (right footwell) |
X6 | 3 or 4-pin terminal block, terminal 58d |
Power supply cable harness (2) | Install and secure. |
Connect following cables to fuse holder (F3)) | Red cable (2.5 mm2) to contact N with oval-head screw M4x12 |
Red cable (1.5 mm2) to contact P with oval-head screw M4x12 | |
Bundled red cables (1.5 mm2 and 2.5 mm2) to contact S. | |
Install following fuses in fuse holder (N3) | 20-amp fuse in F3-33. |
10-amp fuse in F3-36. | |
Auxiliary heater cable harness (1) | Install and secure. |
Connect following cables to fuse holder (F3) (plug side) |
The connectors of the auxiliary heater cable harness (1) are coded and can only be connected in one position. |
3-pin connector (light blue) with red/yellow cable to fuse output (F3-36). | |
1-pin connector (orange) with red/white cable to fuse output (F3-33). | |
Vehicles up to approx. 08/95 | |
Connector housing | install on grey/red and brown/green wires and complete intermediate contact to coolant pump connector (X73/1). |
Vehicles as of approx. 09/95 | |
Connector housing | install on grey/red and brown/green wires, insulate connector housing and tie back (not required). |
All vehicles | |
Then connect the following wires from the wiring harness for the stationary heater (1) | |
Brown wire to ground (W15/1). | |
Grey/blue to terminal block (X6) circuit 58d. | |
Brown wire to ground (W12). | |
Single-pin connector of grey wire to present connector (X72/1) in area of terminal block (X6). |
C. Installing auxiliary heater cable harness and power supply harness for vehicles with automatic heater control
P83-6039-57
Connection diagram for auxiliary heater cable harness in vehicles with automatic heater control
W12 | Ground, center console |
W15/1 | Ground, electronics (right footwell) |
X6 | 3 or 4-pin terminal block, terminal 58d |
X72/1 | 1 or 3-pin connector, auxiliary heater/heating systems for automatic heater, temperature and climate control (HAU, TAU, KLA) |
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
X73/1 | 2-pin connector, circulating pump/auxiliary heater |
X76 | Connector, air volume switch/auxiliary heater |
1 | Auxiliary heater cable harness for vehicles with automatic heater control |
B | 10-pin connector, auxiliary heater control unit (N33) |
D | 2-pin connector, auxiliary heater control unit (N33) |
F3-20 | Fuse 20, terminal 15 |
F3-33 | Fuse 33, terminal 30 |
F3-36 | Fuse 36, terminal 30 |
N34 | Auxiliary heater timer |
S3 | Round plug sleeve, air volume switch, contact 2 |
P83-5367-33
Connection diagram for power supply cable harness
P | To fuse holder F3, connection E (1.5 mm2) |
S | To fuse holder F3, connection S |
2 | Power supply cable harness |
N | To fuse holder F3, connection N (2.5 mm2) |
P83-5371-57
Routing and connection of auxiliary heater cable harness and power supply harness
F3-20 | Fuse 20, terminal 15 |
N34 | Auxiliary heater timer |
X72/1 | 1 or 3-pin connector, auxiliary heater/heating systems for automatic heater, temperature and climate control (HAU, TAU, KLA) |
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
X73/1 | 2-pin connector, circulating pump/auxiliary heater |
1 | Auxiliary heater cable harness for vehicles with automatic heater control |
2 | Power supply cable harness with connections N, P, S |
B | 10-pin connector, auxiliary heater control unit (N33) |
D | 2-pin connector, auxiliary heater control unit (N33) |
F3 | 35-fuse holder in fuse and relay box in F1 |
P83-5372-61
Routing and connection of auxiliary heater cable harness
W12 | Ground, central console |
W15/1 | Ground, electronics (right footwell) |
X6 | 3 or 4-pin terminal block, terminal 58d |
X76 | Connector, air volume switch/auxiliary heater |
1 | Auxiliary heater cable harness for vehicles with automatic heater control |
3 | Round plug sleeve, air volume S3, contact 2 |
4 | Connector, air volume switch S3 |
Power supply cable harness (2) | Install and secure. |
Connect following cables to fuse holder (F3) | Red cable (2.5 mm2) to contact N with oval-head screw M4x12 |
Red cable (1.5 mm2) to contact P with oval-head screw M4x12 | |
Bundled red cables (1.5 mm2 and 2.5 mm2) to contact S. | |
Install following fuses in fuse holder (F3) | 20-amp fuse in F3-33. |
10-amp fuse in F3-36. | |
Auxiliary heater cable harness (1) | Install and secure. |
Connect following cables to fuse holder (F3) (plug side) |
The connectors of the auxiliary heater cable harness (1) are coded and can only be connected in one position. |
3-pin connector (light/blue) with red/yellow cable to fuse output (F3-36). | |
1-pin connector (orange) with red/white cable to fuse output (F3-33). | |
Disconnect 3-pin connector (black) with black/gray/blue and black/pink cables at fuse output (F3-20) and connect to black 3-pin plug (connector X72/1). | |
3-pin connector (black) with red/yellow cable to fuse output (F3-20). | |
Plug housing | Fit to brown/green cable, contact 1 (fit round plug sleeve onto contact 2) and connect into circulating pump connector (X73/1). |
Connector (4) | Disconnect from air volume switch (S3), open. |
Green/blue cable | Remove from connector 4, contact 2, fit connector housing and connect with 1-pin plug on green/white cable of auxiliary heater cable harness (1) (connector X76). |
Round plug sleeve (3) with green/blue cable of auxiliary heater cable harness (1) |
Insert in contact 2 of connector (4) of air volume switch (S3), close connector and connect. |
Connect following cables of auxiliary heater cable harness (1) |
Brown cable to ground point (W15/1). |
D. Installing cable harness for fuel metering pump/radio remote control
P83-5373-55
Connection diagram for cable harness of fuel metering pump/radio remote control
W15 | Ground, power ground, electronics (right footwell) |
X11/15 | 16-pin intermediate connector for diagnosis/tail light cable harness |
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
Y16 | Auxiliary heater (STH) switch-over valve |
Y23 | Auxiliary heater (STH) fuel metering pump |
5 | Fuel metering pum/radio remote control cable harness |
A | 4-pin connector, auxiliary heater control unit (N33) |
C | 14-pin connector, auxiliary heater control unit (N33) |
A6x1 | Connector, heater unit for auxiliary heater |
A6/1 | Radio remote control receiver for auxiliary heater |
P83-5374-61
Routing and connection of cable harness for fuel metering pump/radio remote control
Legend continued on page 17
A6x1 | Connector, heater unit for auxiliary unit |
A6/1 | Radio remote control receiver for auxiliary heater |
C | 14-pin connector, auxiliary heater control unit (N33) |
E | Distance 120 mm for hole 7 |
5 | Fuel metering pump/radio remote control cable harness |
6 | Pre-perforated panel in passenger's footwell |
7 | Hole in region of fuel pump assembly |
8 | Rubber grommet |
A | 4-pin connector, auxiliary heater control unit (N33) |
Legend continued from page 16
X72/4 | 3-pin connector, radio remote control/auxiliary heater power supply |
Y16 | Auxiliary heater (STH) switch-over valve |
Y23 | Auxiliary heater (STH) fuel metering pump |
W15 | Ground, power ground, electronics (right footwell) |
X11/15 | 16-pin intermediate connector for diagnosis/tail light cable harness |
The connectors of the fuel metering pump/radio remote control cable harness (5) are coded and can only be connected in one position. | |
Pre-perforated panel (6) in passenger's footwell | Break out. |
Hole (7) in region of fuel pump assembly | Drill at distance E from center of rubber grommet (8) with dia. 28 mm. |
Fuel metering pump/radio remote control cable harness (5) |
Install and secure. |
Connect following cables | Brown cable to ground point (W15). |
1-pin connector with gray/brown cable to intermediate connector (X11/15), contact 10. | |
3-pin connector with gray/black, red/yellow and brown cables to radio remote control/auxiliary heater connector (X72/4). | |
Route following cable | Lace back 4-pin connector in cable duct of rear right wheelhouse. |
|
Note When installing radio remote control (A6/1), route 4-pin connector as far as partial shelf. | |
Rubber grommets of fuel metering pump/radio remote control cable harness (5) |
Press into holes (6 and 7). |
Referenced documents
- ea8302pb4es01x 83.02 - Installation instructions: Auxiliary heater A. General work Model 140 left-hand drive
- ea8302pb4es03x 83.02 - Installation instructions: Auxiliary heater E./G. Installing and connecting timer, radio, fuel line and metering pump Model 140 left-hand drive
- ea8302pb4es04x 83.02 - Installation instructions: Auxiliary heater H./K. Installing pipe groups Model 140 left-hand drive with 6/8/12-cylinder engine
- ea8302pb4es05x 83.02 - Installation instructions: Auxiliary heater L. Installing thermostat and switch-over valve Model 140 left-hand drive without rear compartment air conditioner
- ea8302pb4es06x 83.02 - Installation instructions: Auxiliary heater M. Installing thermostat and switch-over valve Model 140 left-hand drive with rear compartment air conditioner
- ea8302pb4es07x 83.02 - Installation instructions: Auxiliary heater N. Installing heater unit for auxiliary heater Model 140 left-hand drive with rear compartment air conditioner
- ea8302pb4es08x 83.02 - Installation instructions: Auxiliary heater O. Function test Model 140 left-hand drive
- ea8302pb4es09x 83.02 - Installation instructions: Auxiliary heater P. Information on ordering parts Model 140 left-hand drive