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Throttle Body: Camry

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  1. Electronic Throttle Control System (ETCS) is used for controlling idle speed. ETCS consists of throttle body, accelerator pedal position sensor, Throttle Position (TP) sensor, throttle control motor and Engine Control Module (ECM).
  2. To test operation of throttle control motor, turn ignition on. Depress accelerator pedal to operate accelerator pedal position sensor while listing for operating sound at throttle control motor and note that no grinding noise is heard at throttle control motor and throttle body. Accelerator pedal position sensor is located near top of accelerator pedal and throttle control motor is located on the throttle body. See Fig 1 and Fig 2 .
  3. If throttle control motor operating sound is heard, go to next step. If throttle control motor operating sound is not heard, throttle control motor, wiring harness or ECM may be defective. ECM is located on behind glove box. For illustration of ECM location, see Figure. For wiring of throttle control motor, see ENGINE PERFORMANCE in SYSTEM WIRING DIAGRAMS article in ELECTRICAL. For testing of throttle control motor, go to step  7.
  4. To test operation of Throttle Position (TP) sensor (if equipped), turn ignition off. Connect Toyota hand-held tester or scan tool to data link connector No. 3 at driver's side of instrument panel. See Figure. Turn ignition on. Hand-held tester or scan tool is used to read throttle valve opening which is displayed as a percentage. Ensure Malfunction Indicator Light (MIL) on instrument panel is not illuminated. MIL is displayed as an engine icon. If MIL is not illuminated, go to next step. If MIL is illuminated, a Diagnostic Trouble Code (DTC) may be stored in ECM. See TESTING PROCEDURE under SELF-DIAGNOSTIC SYSTEM in appropriate SELF-DIAGNOSTICS article for retrieving of DTCs.
  5. Read throttle valve opening on hand-held tester or scan tool by accessing THROTTLE POS under CURRENT DATA. Throttle valve opening should be 60 percent or more. Turn ignition off. If throttle valve opening is 60 percent or more, go to next step. If throttle valve opening is not at least 60 percent, problem may exist in TP sensor, wiring circuit or ECM. For testing of TP sensor, go to step  8.
  6. To test operation of accelerator pedal position sensor, ensure ignition is on. Using Toyota hand-held tester or scan tool, read voltage of TP sensor by CURRENT DATA. Voltage should.6-1.0 volts. Turn ignition off. If voltage is not within specification, it may be necessary to check accelerator pedal position sensor. See ACCELERATOR PEDAL POSITION SENSOR  under ENGINE SENSORS & SWITCHES.
  7. To test throttle control motor, disconnect electrical connector at throttle control motor on throttle body. See Fig 1 and Fig 2 . Note terminal identification on throttle body for throttle control motor. See Fig 3 and Fig 4 . Using ohmmeter, check resistance between M+ and M- terminals on throttle body for throttle control motor. Resistance should be.3-100.0 ohms at 68°F (20°C). If resistance is within specification, reinstall electrical connector. If resistance is not within specification, replace throttle body with throttle control motor as an assembly. See THROTTLE BODY under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.
  8. To test Throttle Position (TP) sensor (if equipped), disconnect electrical connector from TP sensor located on throttle body. See Fig 1. Note terminal identification on TP sensor. See Fig 5. Using ohmmeter, check resistance between VC and E2 terminals on TP sensor. Replace TP sensor if resistance is not 1200-3200 ohms at 68°F (20°C). See THROTTLE BODY under FUEL SYSTEMS in REMOVAL & INSTALLATION - V6 & V8 article.
Fig 1: Locating Electronic Throttle Control System Components On Throttle Body & Accelerator Pedal Position Sensor (Camry - Up To Jan. 2003 Production)
G00025450Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 2: Locating Electronic Throttle Control System Components On Throttle Body (Camry - Jan. 2003 & Later Production)
G00233500Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 3: Identifying Terminals On Throttle Control Motor (Camry - Up To Jan. 2003 Production)
G00023047Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 4: Identifying Terminals On Throttle Control Motor (Camry - Jan. 2003 & Later Production)
G00251094Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
Fig 5: Identifying Terminals On Throttle Position Sensor (Camry - Up To Jan. 2003 Production)
G00014937Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
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