WATER HEATER UNIT REMOVAL/INSTALLATION [MZR-CD (RF Turbo)]

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Warning

•  Vaporization of fuel in the fuel tank could occur depending on the temperature causing the pressure to increase.

•  If fuel system related servicing is performed under conditions of high pressure in the fuel tank, the ignition of highly flammable fuel sprayed under high pressure could cause serious injury or death, and damage to facilities and equipment. Fuel can also irritate the skin and eyes.

•  To prevent accidents, always loosen the fuel-filler cap to reduce pressure in the fuel tank before performing servicing on the fuel system.

Caution

•  If the negative battery cable is disconnected during the purge cycle of the water heater unit, the gas in the unit may not be properly scavenged, causing white smoke (unburnt gas) to emit from the exhaust pipe. Before disconnecting the negative battery cable, verify that the water heater unit is not operating (no blower fan operation noise).

1.  Perform water heater unit configuration when replacing it. (See WATER HEATER SYSTEM CONFIGURATION [MZR-CD (RF Turbo)].)

2.  Disconnect the negative battery cable.

3.  Drain the engine coolant. (See ENGINE COOLANT REPLACEMENT [MZR-CD (RF Turbo)].)

4.  Remove the under cover.

5.  Remove the heater silencer.

6.  Disconnect the air intake hose.

7.  Remove the bolts.

8.  Disconnect the fuel hose.

9.  Remove in the order indicated in the table.

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1	Connector
2	Heater hose No.1
3	Heater hose No.2
4	Water heater unit
5	Fuel hose
6	Air intake hose

10.  Install in the reverse order of removal.

11.  Refill the engine coolant.

12.  Perform water heater unit selftest and prefilling Utility. (See WATER HEATER SYSTEM INITIAL SETTING [MZR-CD (RF Turbo)].)