Fuel Line Pressure Inspection

WARNING: This page is about a different variant/trim than selected.

WARNING:

Fuel line spills and leakage are dangerous. Fuel can ignite and cause serious injuries or death. Fuel can also irritate skin and eyes. To prevent this, always complete the "BEFORE REPAIR PROCEDURE".

Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE PRECAUTION .)
Disconnect the negative battery cable. (See BATTERY REMOVAL/INSTALLATION [MZI 3.7 V6] .)
Remove the engine cover. (See ENGINE COVER REMOVAL/INSTALLATION .)
Remove the air hose. (See INTAKE-AIR SYSTEM REMOVAL/INSTALLATION .)
Perform the work using the following procedure.
- Disconnect the quick release connector from the fuel distributor. (See QUICK RELEASE CONNECTOR REMOVAL/INSTALLATION .)
- Connect the thin part of SST (49 T013 102) to SST (49 N013 102A) until a click sound is heard.
  
  Fig 1: Fuel Line Pressure Inspections SSTs
- Connect the thick end of SST (49 T013 102) to the quick release connector until a click sound is heard.
- Connect SST (49 B019 901B) to SST (49 N013 101A).
- Connect SST (49 N013 101A) to SST (49 N013 102A) until a click sound is heard.
- Turn the SST lever so that it is 90° to the hose as shown in the figure.
Verify that the selector is in N or P position.
Remove the fuel pump relay.

Fig 2: Identifying Fuel Pump Relay Location In Main Fuse Block
CAUTION:
- Short the specified terminals because shorting the wrong terminal of the main fuse block may cause malfunctions.
Using a jumper wire, short fuel pump relay terminals C and D in the main fuse block.

Fig 3: Shorting Fuel Pump Relay Terminals C And D In Main Fuse Block Using Jumper Wire
Connect the negative battery cable and operate the fuel pump. (See BATTERY REMOVAL/INSTALLATION [MZI 3.7 V6] .)
Measure the fuel line pressure. (during key on engine off (KOEO))
- If not as specified, inspect the following:
  Zero or low
  - Fuel pump circuit
  - Fuel pump
  - Fuel line (clogging)
  - Fuel leakage inside pressure regulator
  High
  - Pressure regulator
Fuel line pressure
- 375-450 kPa {3.83-4.58 kgf/cm² , 54.4-65.2 psi}
Turn the ignition switch off.
Disconnect the negative battery cable to stop the fuel pump. (See BATTERY REMOVAL/INSTALLATION [MZI 3.7 V6] .)
Measure the fuel hold pressure after 5 min .
- If not within the specification, inspect the following:
  - Fuel line for clogging or leakage
Fuel hold pressure
- 200 kPa {2.04 kgf/cm² , 29.0 psi}
Complete the "BEFORE SERVICE PRECAUTION". (See BEFORE SERVICE PRECAUTION .)
Disconnect the fuel pressure gauge and connect the fuel pipe.
Complete the "AFTER SERVICE PRECAUTION". (See AFTER SERVICE PRECAUTION .)