Fuel Line

REMOVAL
1. Raise and support the vehicle while taking note of the location of the flexible exhaust tube section.

Dosing Pump Fuel Line:

2. Remove clamps on dosing pump end of fuel line and separate line from the pump.

NOTE: Have an approved fuel holding device ready to capture any diesel fuel that drains from the fuel line or heater unit.

3. Remove clamp from the fuel line at the fuel tank connection and separate the line from the tank.
4. Remove any retaining clips and remove the fuel line from vehicle.

INSTALLATION

WARNING:
- DO NOT OPERATE THE DCHA IN AN ENCLOSED AREA SUCH AS A GARAGE THAT DOES NOT HAVE EXHAUST VENTILATION FACILITIES. ALWAYS VENT THE DCHA's EXHAUST WHEN OPERATING THE DCHA. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY OR DEATH.
- ALLOW THE DCHA ASSEMBLY TO COOL BEFORE PERFORMING A COMPONENT INSPECTION/REPAIR/REPLACEMENT. FAILURE TO FOLLOW THESE INSTRUCTIONS MAY RESULT IN PERSONAL INJURY.
- VERIFY THAT ALL DCHA FUEL LINES ARE SECURELY FASTENED TO THEIR RESPECTIVE COMPONENTS BEFORE PERFORMING THIS PROCEDURE.

NOTE: Verify that there is more than 1/8 of a tank of fuel in the vehicle's fuel tank before performing this procedure. Add fuel, if necessary.

1. Install the heater fuel supply line into vehicle and fuel line retainers.
2. Install the fuel line connection at the fuel tank and tighten the connection securely.
3. Install the fuel line at the dosing pump and tighten the connection securely.
4. Lower the vehicle.

NOTE: Failure to prime the dosing pump after draining the DCHA fuel line will prevent DCHA heater activation during the first attempt to start the heater. This will also set a Diagnostic Trouble Code (DTC) in the DCHA Control's memory. Do not perform the Dosing Pump Priming procedure if an attempt was made to start the DCHA without priming the dosing pump first. This will put excess fuel in the DCHA Heater Module and cause smoke to emit from the DCHA exhaust pipe when heater activation occurs.

5. Connect the DRBIII(R) scan tool to the Diagnostic Link Connector.
6. Turn the ignition to the ON position.

NOTE:
- Do not activate the Dosing Pump Prime more than one time. This will put excess fuel in the DCHA Heater Module an cause smoke to emit from the DCHA exhaust pipe when heater activation occurs.
- A clicking noise heard coming from the dosing pump indicates that the pump is operational.

7. With the DRBIII(R) scan tool in Cabin Heater, select System Tests and Dosing Pump Prime. Allow the dosing pump to run for the full 45 second cycle time. When the 45 second cycle is complete, press Page Back on the DRBIII(R) scan tool key pad to exit the Dosing Pump Prime. The Dosing Pump Priming procedure is now complete.