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Home >> Jeep >> 1990 >> Wagoneer >> Repair and Diagnosis >> Engine Performance >> System >> Ignition System Tests - 4.0L >> Testing >> Engine Speed Sensor Test

Engine Speed Sensor Test

  1. Disconnect the engine speed sensor connector from the ignition control module.
  2. place an ohmmeter between terminals "A" and "B" (marked on the connector). On a hot engine, the resistance reading should be between 125-275 ohms.
  3. Replace sensor if readings are not within specification.
Fig 1: View of Engine Speed Sensor Connectors (At Sensor)
G50E04613Courtesy of CHRYSLER MOTORS.
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