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Home >> Acura >> 1990 >> Integra LS, 2D Hatchback, Automatic >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - Tests W/Codes >> Code 7: Throttle Angle Sensor
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Code 7: Throttle Angle Sensor

NOTE: For wiring diagrams, see WIRING DIAGRAMS article. For vacuum diagrams, see VACUUM DIAGRAMS article.
  1. Turn ignition off. Remove hazard fuse at battery positive terminal for 10 seconds to reset ECU. Start engine. Verify if CHECK ENGINE and LED lights are on and if LED indicates Code 7. If it does, go to next step. If not, problem is intermittent. Check for poor or loose connections at throttle angle sensor, connector C216 at right shock tower and connector C318 at left shock tower. Test drive and check again.
  2. If light is on, turn ignition off. Disconnect 3-wire connector from throttle angle sensor. Turn ignition on. Measure voltage between Yellow/White (positive) and Green (negative) wire terminals. If approximately 5 volts is not present, go to step 5). If voltage is about 5 volts, turn ignition off. Reconnect sensor connector. Connect ECU test harness between ECU and ECU connector.
  3. Turn ignition on. Measure voltage between ECU terminals C7 (positive) and C12 (negative). See Figure . Voltage should read .3 volts at closed throttle, and about 4.5 volts at wide open throttle, with a smooth transition between the lower and upper voltage specification as the throttle is depressed.
  4. On automatic transmission, if sensor voltages are not correct, disconnect 18-pin connector from A/T control unit. Recheck voltages, if voltages are correct, replace A/T control unit. On all models, If voltages are not correct, replace throttle angle sensor or repair open or short in Red/Blue wire between ECU terminal C7, A/T control unit and throttle sensor.
  5. If throttle sensor voltages are correct as measured in step 3), substitute a known good ECU. If condition goes away, replace original ECU. If voltage reading between Yellow/White (positive) and Green (negative) wire terminals in step 2) was not about 5 volts, measure voltage between Yellow/White (positive) wire terminal and ground.
  6. If about 5 volts is present, repair open in Green wire between ECU terminal C12 and throttle angle sensor. If about 5 volts is not present, turn ignition off. Connect ECU test harness between ECU and ECU connector. Turn ignition on.
  7. Measure voltage between ECU terminals C13 (positive) and C12 (negative). If about 5 volts is present, repair open in Yellow/White wire terminal between ECU terminal C13 and throttle angle sensor. If about 5 volts is not present, substitute a known good ECU. If condition goes away, replace original ECU.
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