1. Disconnect the ground cable from battery.
2. Remove the collector cover.
NOTE:
Follow the steps below when removing the collector cover.
(1) Pull up the two points at the rear (A).
(2) Pull up the two points at the front (B) while moving them forward.
3. Remove the intake manifold. 
4. Clean the suction control valve vicinity, and perform air blow.
5. Disconnect the connector for suction control valve.
6. Remove the suction control valve from fuel pump.
CAUTION:
• To prevent contamination by foreign matter, do not wear cotton work gloves during the procedures.
• To prevent the fuel pump and suction control valve from being damaged, do not use tools to remove the parts.
• Pull out horizontally only. Pulling out while turning may cause damage to the part.
• Do not hit tools to the fuel delivery pipes and fuel return pipes.
• Do not reuse the suction control valve removed from the fuel pump. Always replace the valve with a new part.
(1) Loosen the suction control valve mounting bolts.
(2) Pull out the suction control valve horizontally from fuel pump.
(3) Visually check that there is no O-ring remaining inside the fuel pump housing.
(4) Remove the large O-ring from suction control valve.
CAUTION:
Do not remove the small O-ring from suction control valve.