Fuel Leakage Inspection

WARNING:

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death and damage. Always carry out the following procedure with the engine stopped.
A person charged with static electricity could cause a fire or explosion, resulting in death or serious injury. Before performing work on the fuel system, discharge static electricity by touching the vehicle body.

CAUTION:

Connecting to the wrong check connector terminal may cause a malfunction. Carefully connect only to the specified terminal.

Start the fuel pump using the following procedure.
Using M-MDS
1. Connect the M-MDS to the DLC-2.
2. Using the simulation function "FP", start the fuel pump.
Without using M-MDS
1. Disconnect the negative battery cable.
2. Remove the fuel pump relay.
  CAUTION:
  - Short the specified terminals because shorting the wrong terminal of the main fuse block may cause malfunctions.
    
    Fig 1: Identifying DLC-2 Connector
    Courtesy of MAZDA MOTORS CORP.
3. Using a jumper wire, short fuel pump relay terminals C and D in the main fuse block.
4. Connect the negative battery cable and operate the fuel pump.
Pressurize the system in this manner for at least 5 min to be sure there is no leakage.
- If there is fuel leakage, inspect the fuel hoses, hose clamps, and fuel pipe sealing surface, and replace if necessary.
  
  Fig 2: Identifying Fuel Pump Relay Terminals
  Courtesy of MAZDA MOTORS CORP.
After repair, assemble the system and repeat Steps 1 to 3.