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Home/Honda/CR-V/Honda CR-V I рестайлинг (1999-2001)/Repair manual/Testing & Diagnostics/DTC P0122: THROTTLE POSITION (TP) SENSOR LOW VOLTAGE INPUT
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DTC P0122: THROTTLE POSITION (TP) SENSOR LOW VOLTAGE INPUT Honda CR-V I рестайлинг

Testing & Diagnostics ~425 words
  1. Start engine and run at 3000 RPM with no loads and transmission in Park or Neutral until radiator fan comes on. Turn ignition off. Turn ignition on. Using scan tool, check throttle position. If about 10 percent with throttle fully closed and 90 percent with throttle fully opened is not indicated, go to next step. If about 10 percent with throttle fully closed and 90 percent with throttle fully opened is indicated, problem is intermittent. System is okay at this time. Check for poor connections or loose wires at TP sensor and PCM connectors. See appropriate wiring diagram in WIRING DIAGRAMS article.
  2. Turn ignition off. Disconnect TP sensor 3-pin connector. Turn ignition on. Measure voltage between TP sensor 3-pin harness connector terminal No. 1 (Green/Black wire) and terminal No. 3 (Yellow/Blue wire). (Схема №6) If about 5.0 volts does not exist, go to next step. If about 5.0 volts exists, go to step 4.
  3. Using backprobe set, measure voltage between PCM 31-pin connector "C" terminal No. 18 (Green/Black wire) and terminal No. 28 (Yellow/Blue wire). (Схема №3) If about 5.0 volts exists, repair open in Yellow/Blue wire between PCM 31-pin connector "C" terminal No. 28 and TP sensor. See appropriate wiring diagram in WIRING DIAGRAMS article. If about 5.0 volts does not exist, substitute a known-good PCM and recheck. See SUBSTITUTING PCM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or indication goes away, replace original PCM.
  4. Turn ignition off. Measure TP sensor resistance between sensor connector terminals No. 1 and 2 with throttle fully closed. (Схема №6) If resistance is about 500-900 ohms, go to next step. If resistance is not about 500-900 ohms, replace throttle body (TP sensor cannot be serviced separately).
  5. Measure TP sensor resistance between sensor connector terminals No. 2 and 3 with throttle fully closed. (Схема №6) If resistance is about 4500 ohms, go to next step. If resistance is not about 4500 ohms, replace throttle body (TP sensor is not serviced separately).
  6. Reconnect TP sensor connector. Turn ignition on. Using backprobe set, measure voltage between PCM 31-pin connector "C" terminal No. 18 (Green/Black wire) and terminal No. 27 (Red/Black wire). (Схема №3) If voltage is about 0.5 volt with throttle fully closed and 4.5 volts with throttle fully open, substitute a known-good PCM and recheck. See SUBSTITUTING PCM in SELF-DIAGNOSTICS - INTRODUCTION article. If symptom or indication goes away, replace original PCM. If voltage is not as specified, repair short in Green/Black wire between PCM 31-pin connector "C" and TP sensor.

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