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Auxiliary Cabin Heater Overheat Sensor / Switch > < Auxiliary Cabin Heater Fuel Pump|Service and Repair|Page 11044
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Remove the quick-release connector on the fuel hose routed to the fuel pump (FP) for the engine coolant heater at the suction hose on the fuel tank unit.

Note! Wipe up any fuel spills.

Remove:

-

the fuel lines from the fuel pump (FP) on top of the fuel tank

-

the fuel pump (FP) and hoses running back over the rear axle.

Installation

Note! For tightening torques, see Specifications. See: Body and Frame/Specifications

Installing the fuel pump (FP)

Thread the fuel pump (FP) hoses above the rear axle and over the fuel tank.

Install:

-

the fuel pump and its bracket in the rear sub-frame. Do not tighten the mounting screw yet

-

the fuel lines on top of the fuel tank

-

the fuel connection on the suction side at the fuel tank unit

-

the fuel tank. See: Fuel tank See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and
Replacement  Fuel tank See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement 
Fuel tank See: Powertrain Management/Fuel Delivery and Air Induction/Fuel Tank/Service and Repair/Removal and Replacement 

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the fuel connection in front of the fuel tank.

Tighten the 1 M6 screw for the fuel pump (FP) bracket.

Finishing

Testing the engine coolant heater

Carry out a performance test of the engine coolant heater. See: Fuel-powered preheater, checking See: Testing and Inspection/Component Tests and
General Diagnostics/Fuel-Powered Preheater, Checking.

Auxiliary Cabin Heater Overheat Sensor / Switch > < Auxiliary Cabin Heater Fuel Pump|Service and Repair|Page 11044