Removing components
For the overheat protection thermostat and coolant temperature sensor
Scheme 258
Remove
- Remove the nut (tightened to 2 Nm) and cover.
- Remove the coolant temperature sensor and the overheat protection thermostat.
Scheme 259
For the flame sensor
Remove
- the fan shroud. See «Fan shroud»(ref-406998-S02218737212011070100000) .
Scheme 260
Remove the flame sensor.
Connect the fuel line to a vacuum pump. Suck carefully until fuel comes out. Connect the cables and hoses.
Installing components
Reinstall the components.
Reinstall the heater in reverse order.
Note. Always check that there is clearance between the fuel line and water hose.
Note. Start the engine and let it idle for a few seconds before starting the heater.
Test run the heater. Check the function of the heater. See Engine coolant heater, test running
Check both the coolant hoses and the fuel lines for leakage.
Top up the coolant if necessary.
Check that no diagnostic trouble codes (DTC) have been stored during the repair work.
Scheme 261
Peel 5.0mm / 0.2 in of the insulation off the 4 cable ends (13/64 inches) using pliers 9512620 .
Scheme 262
Twist the strands on the stripped wire ends. Do NOT forget to do this on all four wire ends.
Note. Make sure the strands are twisted.
Scheme 263
Note. Cable should always be connected color for color, single color to single color or multiple colors to multiple colors. The cables must NOT under any circumstances be incorrectly connected, always color for color.
Install the shrink tubing 951 2783 in the pressure tool 9512785 in output "Green". Clamp the pliers enough to hold the shrink tubing.
Scheme 264
Note. The sleeve must sit in the correct output of the pressure tool, position "Green".
Feed the end of the wire in the shrink tubing that is held by the pliers. Feed the wire into the shrink tubing until it stops, make sure that the wire insulation does not go near the clamp on the sleeve or the stripped wire will protrude outside the sleeve.
Scheme 265
Clamp the shrink tubing tightly.
Scheme 266
Press the handles of the pliers fully together to obtain a correct joint, the pliers automatically release their grip afterwards.
Scheme 267
Feel by hand to make sure the shrink tubing is correctly installed.
Check that measurement B is 40mm (1-1/2 inches) between the joints from center to center.
Scheme 268
Note. Remember the cable, color to color (with same color/ single or multicolored).
When the first join is completed and checked, join the rest of the wire ends in the same way.