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Home >> Volvo >> 1993 >> 850 Automatic >> Repair and Diagnosis >> Transmission >> Automatic Trans >> Diagnosis - Aw50-42LE >> Component Testing >> Rpm Sensor

Rpm Sensor

  1. Ensure ignition switch is off. Connect measuring unit to TCM. See Figure. Using a DVOM, measure resistance between measuring unit terminals No. 1 and 2. Resistance should be 300-600 ohms. If resistance is as specified, sensor and wiring are okay. If resistance is not as specified, go to next step.
  2. Measure resistance between transaxle 26-pin connector terminals No. 16 and 17. See Figure. Resistance should be 300-600 ohms. If resistance is as specified, sensor is okay. If resistance is not as specified, replace sensor.
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