019-031   Electronic Control Module (ECM)

Initial Check

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Turn keyswitch ON while monitoring the fault lamps. The fault lamps

must illuminate for 2 to 3 seconds.

If lamps do

not illuminate, check for burned-out bulbs.

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Turn keyswitch OFF.

Connect an electronic service tool to the vehicle datalink.

Turn keyswitch ON.

Select the monitor mode on the electronic service tool. The electronic service tool

must be able to communicate with the ECM.

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Remove

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Disconnect the OEM, sensor, and actuator harness connectors from the ECM, if they are

not already removed. Refer to Procedure 019-043 in the appropriate troubleshooting and repair manual.

A = Sensor
B = OEM
C = Actuator.

NOTE: Document all of the programmable parameters, features, and calibration data used in the old ECM. These data will be needed to program the new ECM.

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Unscrew the six metric capscrews that hold the ECM to the cooling plate. Pull the ECM off the cooling plate.

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Do

not remove the dataplate from the old ECM.

 
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Install

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NOTE: Do not paint the backside of the ECM. Make sure there is no grease or dirt between the ECM and the cooling plate.

 
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Install the new ECM to the cooling plate. Tighten the six capscrews.

Torque Value:  7  n.m  [62 in-lb]

Make sure the star washer is installed under one of the capscrews.

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 CAUTION 

To reduce the possibility of ECM damage, do not blow compressed air into the ECM ports or connectors. Compressed air can contain moisture due to condensation.

Use quick-dry electrical contact cleaner, Part Number 3824510, to remove all dirt and moisture from the ECM connector ports and the harness connectors.

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 CAUTION 

Use only Cummins-recommended lubricant DS-ES, Part Number 3822934. Other lubricants, such as lubricating oil or grease, in the connectors can cause ECM damage, poor engine performance, or premature connector pin wear.

Apply a thin coating of lubricant to the connector nosepiece.

 
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Spread the lubricant across the connector nosepiece, making certain that it lubricates each pin and pin hole. Continue spreading out the lubricant until it can

not be seen on the nosepiece.

 
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Plug the sensor, OEM, and actuator harness connectors into the ECM. Tighten the connector capscrews to the ECM.

Torque Value:  2  n.m  [18 in-lb]

NOTE: When an ECM is replaced, the new ECM

must be calibrated
(i.e., programmed). Refer to Procedure

019-032.

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Copy both the ESN and ECM CODE that are on the old ECM’s dataplate to the new ECM’s dataplate. Write these two numbers onto the dataplate with an electric pencil. Please include the SC and GOV data for United Kingdom (U.K.)
engines, in addition to the ESN and ECM CODE.

 CAUTION 

Do not punch the dataplate with a hammer and letter punch. Damage to the ECM can occur.
 
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Voltage Check

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 CAUTION 

To reduce the possibility of connector damage, do not use probes or leads other than Part Number 3822917. The leads must fit tightly in the connector without expanding the pins in the connector.

Turn keyswitch OFF.

Disconnect the engine harness sensor connector from the ECM.

Disconnect the OEM harness connector from the ECM.

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Turn keyswitch ON.

Measure the voltage from the fuel shutoff valve to the engine block. There

must be battery voltage at the fuel shutoff valve.

If there is

not battery voltage at the fuel shutoff valve, verify continuity of the wire between the solenoid and the ECM.

If continuity exists, replace the ECM. If no continuity exists, repair or replace the harness.

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Turn keyswitch OFF.

Connect a test lead to pin 2 of the ECM sensor port and the positive probe of the multimeter.

Connect the other lead to pin 4 of the ECM sensor port and the other end to the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 2 to pin 4 of the ECM sensor port. The voltage

must be 4.75 to 5.25 VDC.

If the voltage is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 5 of the ECM sensor port and the positive probe of the multimeter.

Connect the other lead to pin 23 of the ECM sensor port and the other end to the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 5 to pin 23 of the ECM sensor port. The voltage

must be 4.75 to 5.25 VDC.

If the voltage is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 22 of the ECM sensor port and the positive probe of the multimeter.

Connect the other lead to pin 13 of the ECM sensor port and the other end to the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 22 to pin 13 of the ECM sensor port. The voltage

must be 4.75 to 5.25 VDC.

If the voltage is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 3 of the ECM sensor port and the positive probe of the multimeter.

Connect the other lead to pin 13 of the ECM sensor port and the other end to the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 3 to pin 13 of the ECM sensor port. The voltage

must be 4.75 to 5.25 VDC.

If the voltage is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 12 of the ECM sensor port and the positive probe of the multimeter.

Connect the other test lead to pin 17 of the ECM sensor port and the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 12 to pin 17 of the ECM sensor port. There

must be 4.75 to 5.25 VDC.

If there is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 21 of the ECM sensor port and the positive probe of the multimeter.

Connect the other test lead to pin 25 of the ECM sensor port and the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 21 to pin 25 of the ECM sensor port. There

must be 4.75 to 5.25 VDC.

If there is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 3 of the ECM sensor port and the positive probe of the multimeter.

Connect the other test lead to pin 6 of the ECM sensor port and the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 3 to pin 6 of the ECM sensor port. There

must be 4.75 to 5.25 VDC.

If there is

not 4.75 to 5.25 VDC, replace the ECM.

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Turn keyswitch OFF.

Connect a test lead to pin 18 of the ECM OEM port and the positive probe of the multimeter.

Connect the other test lead to pin 19 of the ECM OEM port and the negative probe of the multimeter.

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Turn keyswitch ON.

Measure the voltage from pin 18 to pin 19 of the ECM OEM port. The voltage

must be 4.75 to 5.25 VDC.

If the voltage is

not 4.75 to 5.25 VDC, replace the ECM.

Connect all components when the repair is complete.

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Last Modified:  10-Feb-2003

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