DDEC III/IV Single ECM Troubleshooting

Section 32.3 Troubleshooting Flash Code 32

Section 32.3
Troubleshooting Flash Code 32

The following procedure will troubleshoot Flash Code 32.‪

Section 32.3.1
Determine Failure Mode Identifier (3 or 4)

Perform the following steps to determine FMI.‪

  1. Turn ignition ON.
  2. Plug in diagnostic data reader (DDR) into the diagnostic data link (DDL).
  3. Read codes.
    1. If code 238/4 or 239/4 is logged, reprogram the ECM. Refer to "32.3.3 Verify Repairs" .
    2. If code 238/3 or 239/3 is logged, refer to "32.3.2 Check for Short to Battery" .

Section 32.3.2
Check for Short to Battery

Perform the following steps to determine failure.‪

  1. Turn vehicle ignition OFF.
  2. Disconnect vehicle harness connector.
  3. Turn ignition ON.
  4. Remove CEL bulb and SEL bulb.
  5. Measure voltage between B2 (#509) and a good ground. See Figure "ECM Vehicle Harness Connector" .
    Click to see this graphic in a separate window

    Figure 1. ECM Vehicle Harness Connector

  6. Measure voltage between B1 and a good ground.
    1. If either measurement was greater than 0.5 volts, the wire that had the reading is shorted to some voltage source. Replace the wire(s). Refer to "32.3.3 Verify Repairs" .
    2. If no measurement was greater than 0.5 volts, contact Detroit Diesel Technical Service.

Section 32.3.3
Verify Repairs

Perform the following steps to verify repairs.‪

  1. Connect all connectors.
  2. Start and run the engine.
  3. Plug the diagnostic data reader (DDR) into the diagnostic data link (DDL). Read codes.
    1. If active code 32 is logged, review this section to find the error. Refer to "32.1 Description of Flash Code 32" .
    2. If code 32 is not logged, troubleshooting is complete.


DDEC III/IV Single ECM Troubleshooting Guide - 6SE497
Generated on 10-13-2008

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