Fuel Supply System Safety Precautions
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Note the following when working on the fuel supply:
WARNING:
There is a risk of injury because the fuel is under very high pressure.
- The fuel injection system is separated into a high-pressure section (maximum approximately 120 bar (1740 psi)) and a low-pressure section (4 to 7 bar (58 to 101.5 psi)).
- Before opening high pressure area, fuel pressure must be reduced to a residual pressure of approximately 6 bar (87 psi). Procedure, refer to HIGH FUEL PRESSURE, REDUCING .
To prevent personal injury and damage to the injection and ignition system, observe the following:
- The ignition must be switched off before connecting or disconnecting injection and ignition system wiring or tester cables.
- Wash the engine only when the ignition is turned off.
- Delete any Diagnostic Trouble Code (DTC) memory entries that occurred during testing or assembly Vehicle Diagnostic Tester, Guided Functions , Check DTC Memory , and then Generate Readiness Code .
CAUTION:
Risk of damaging electronic components when disconnecting the battery.
- Complete the steps for disconnecting the battery.
- Disconnect the battery only when the ignition is turned off, refer to BATTERY, DISCONNECTING AND CONNECTING .
WARNING:
Burn risk due to escaping fuel.
- Because the Transfer Fuel Pump -G6- runs briefly when the battery is connected and the driver's door is opened, the voltage supply to the Transfer Fuel Pump -G6- must be disconnected before opening the fuel system.
-- Remove the fuse for the Fuel Pump Control Module -J538- in the Fuse Panel B -SB- in the engine compartment E-box; fuse assignment, refer to appropriate SYSTEM WIRING DIAGRAM.