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Engine Controls - Basic Testing - 2.2L: Overview Toyota Celica T200 рестайлинг

Testing & Diagnostics 2 illustrations ~427 words

FUEL PUMP OPERATION

Note. Electric fuel pump operation may be checked by using scan tool or by applying battery voltage to fuel pump. Electric fuel pump is located in the fuel tank.

Checking Fuel Pump Operation Using Scan Tool

  1. Remove cover (if equipped) and connect scan tool to data link connector No. 3. (Scheme 40) Turn ignition on. DO NOT start engine.
  2. Turn scan tool on. Select ACTIVE TEST MODE on scan tool. Using scan tool manufacturer's instructions, activate fuel pump. Listen for fuel pump operating sound and feel for pressure in fuel inlet line from fuel filter. Turn ignition off. Remove scan tool. If fuel pump operates, check fuel pressure. See «FUEL PRESSURE»(ref-22327-S34101170312001010300000) under FUEL SYSTEM.
  3. If fuel pump does not operate, EFI main relay, circuit opening relay or fuel pump relay (if used) may be defective. For relay application and explanation of relay operation, see «FUEL PUMP CONTROL CIRCUIT»(ref-22327-S28104722922001010300000).
  4. If relays are okay, check for defective wiring circuit, defective fuses, defective fuel pump or defective fuel pump ground circuit. See appropriate wiring diagram in the «WIRING DIAGRAMS - 2.2L»(/toyota/celica/t200-1995-1999/remont/wiring-diagrams-engine-performance/#wiring-diagrams-22l) article.

Scheme 40

Scheme 40
Scheme 40

Checking Fuel Pump Operation By Applying Battery Voltage To Fuel Pump

  1. Remove rear seat and cover plate on floor panel for access to electrical connector at fuel pump. NOTE: A break in step numbering sequence occurs at this point. Procedure skips from step 1) to step 5). No test procedures have been omitted.
  2. Disconnect electrical connector for fuel pump. NOTE: Electrical connector for fuel pump is located near fuel pump. (Scheme 41) CAUTION: When applying battery voltage to fuel pump, DO NOT apply battery voltage for more than 10 seconds or fuel pump may be damaged.
  3. Connect battery voltage to specified terminals on fuel pump to activate fuel pump. (Scheme 41) DO NOT apply battery voltage to fuel pump for more than 10 seconds.
  4. Listen for fuel pump operating sound. If fuel pump operates, check fuel pressure. See «FUEL PRESSURE»(ref-22327-S34101170312001010300000) under FUEL SYSTEM. Disconnect battery voltage from fuel pump.
  5. If fuel pump fails to operate, replace fuel pump. If fuel pump will not operate while trying to start engine, EFI main relay, circuit opening relay or fuel pump relay (if used) may be defective. For explanation of relay operation, see «FUEL PUMP CONTROL CIRCUIT»(ref-22327-S28104722922001010300000).
  6. If relays are okay, check wiring circuit, fuses and fuel pump ground. See appropriate wiring diagram in «WIRING DIAGRAMS - 2.2L»(/toyota/celica/t200-1995-1999/remont/wiring-diagrams-engine-performance/#wiring-diagrams-22l) article. Reinstall electrical connector and remaining components.

Scheme 41

Scheme 41
Scheme 41

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