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Home >> Plymouth >> 1990 >> Colt Base >> Repair and Diagnosis >> Engine Performance >> System >> Engine Controls - System/Component Tests - PFI >> TDC Sensor (DOHC Engines) >> Test No. 3
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Test No. 3

  1. Disconnect crank angle connector. Turn ignition on. Connect voltmeter negative lead to ground.
  2. On Colt and Colt 200 1.6L, connect voltmeter positive lead to crank angle connector terminal No. 1.
  3. On all models, if voltmeter reads 5 volts, replace crank angle and TDC sensor assembly. If voltmeter reads 0 volts, turn ignition off. Disconnect 24-pin connector from Engine Control Unit (ECU). Connect one lead of ohmmeter to ground.
  4. At main harness side of crank angle connector, connect other ohmmeter lead to crank angle connector terminal No. 1 (Colt and Colt 200 1.6L).
  5. On all models, if there is continuity, repair short to ground in ground wire between crank angle connector and ECU connector. If there is no continuity, replace ECU.
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