Chrysler RAM50/D50/Arrow 1979-1993 Repair Guide

Engine Control Module (ECM)

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TERMINAL VOLTAGE TESTING



See Figures 1 through 11

  1. Connect extra fine wire probes to the voltmeter probes (paper clip, etc.)
  2.  



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Fig. Fig. 1: The arrangement of the ECM terminals-2.4L and 3.0L engines



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Fig. Fig. 2: The arrangement of the ECM terminals-2.4L (California RWD 1993)



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Fig. Fig. 3: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 4: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 5: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 6: The ECM terminal voltage check chart-2.4L (California RWD 1993) engines



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Fig. Fig. 7: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 8: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 9: The ECM terminal voltage check chart-2.4L engines



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Fig. Fig. 10: The ECM terminal voltage check chart-3.0L engines



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Fig. Fig. 11: The ECM terminal voltage check chart-3.0L engines

  1. Insert the extra fine wire probes from the wire side to each terminal of the ECM connector and measure the voltage while referring to the check chart.
  2.  

Measure the voltage with the ECM connector plugged in. Measure the voltage between each terminal and the grounding terminal. You may find it convenient to pull the ECM out to make it easier to reach the connector terminals. It is not necessary to do inspection in the order of the chart.



2.4L Engines: terminal 106.
 
2.4L (California RWD 1993) Engines: terminal 26.
 
3.0L Engine: terminal 106.
 


WARNING
Short-circuiting the positive (+) probe between a connector terminal and any ground other than the grounding terminal could damage the vehicle wiring, the sensor or the ECM. Use care to prevent this from happening.

  1. If the voltmeter shows any deviation from the standard value, check the corresponding sensor, actuator and related electrical wiring, then repair or replace as needed.
  2.  
  3. After the repair or replacement, recheck the ECM with the voltmeter to confirm that the repair has corrected the malfunction.
  4.  

 
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