Contents
00 - Technical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1 Safety information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.1 Safety precautions during work on fuel system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
1.2 Safety precautions when working on vehicles with start/stop system . . . . . . . . . . . . . . . . 1
1.3 Safety precautions when using testing and measuring instruments during a road test . . . . 2
1.4 Safety precautions when working on the cooling system . . . . . . . . . . . . . . . . . . . . . . . . . . 2
1.5 Safety precautions for working on vehicles with auxiliary heater . . . . . . . . . . . . . . . . . . . . 2
2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.1 Type plates . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.2 Starting conditions for auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
2.3 Rules for cleanliness when working on auxiliary/supplementary heater and fuel system . . 5
2.4 Notes for vehicles with a start/stop system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
3 Repair notes . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.1 Rules for cleanliness . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.2 General information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.3 General repair instructions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
3.4 Contact corrosion . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.5 Nuts and bolts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
3.6 Routing and attachment of lines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
4 Hazard classification of high-voltage system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
82 - Supplementary heating . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
1 Overview of fitting locations - auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . 9
1.1 Overview of fitting locations - components not located in passenger compartment . . . . . . 9
2 Auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
2.1 Overview of fitting locations - auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . 10
2.2 Assembly overview - auxiliary/supplementary heater, internal . . . . . . . . . . . . . . . . . . . . . . 12
2.3 Assembly overview - auxiliary/supplementary heater attachments . . . . . . . . . . . . . . . . . . 13
2.4 Removing and installing auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . . . . . 14
2.5 Removing and installing air intake silencer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.6 Removing and installing circulation pump V55 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
2.7 Removing and installing exhaust system . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
2.8 Removing and installing cover . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
2.9 Dismantling and assembling heater unit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
2.10 Removing and installing glow plug with flame monitor Q8 . . . . . . . . . . . . . . . . . . . . . . . . 21
2.11 Removing and installing temperature sensor G18 and overheating sensor G189 . . . . . . 22
2.12 Removing and installing auxiliary heater control unit J364 . . . . . . . . . . . . . . . . . . . . . . . . 23
2.13 Removing and installing combustion air blower V6 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2.14 Connector pin assignment for auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . 23
3 Coolant circuit with auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.1 Connection diagram – coolant hoses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
3.2 Removing and installing heater coolant shut-off valve N279 . . . . . . . . . . . . . . . . . . . . . . 25
4 Fuel supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.1 Checking fuel delivery rate . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
4.2 Removing and installing metering pump V54 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
5 Regulation of auxiliary/supplementary heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
6 Other controlling and regulating components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
6.1 Removing and installing ambient temperature sensor G17 . . . . . . . . . . . . . . . . . . . . . . . . 32
6.2 Removing and installing remote control receiver for auxiliary coolant heater R149 . . . . . . 32
7 Auxiliary air heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
7.1 Assembly overview – auxiliary air heater . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Transporter 2020 ➤
Auxiliary heater - Edition 04.2020
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