DDEC III/IV Single ECM Troubleshooting – Section 53.3 Troubleshooting Flash Code 53

Section 53.3
Troubleshooting Flash Code 53

The following procedure will troubleshoot Flash Code 53. ‪

Note: Inactive code 53 should be cleared with the DDR and the unit returned to service if ECM SW is greater than or equal to 7.00.

Section 53.3.1
Multiple Code Check

Perform the following steps to check for multiple codes.‪

1. Turn vehicle ignition switch ON.
2. Plug in the diagnostic data reader (DDR).
3. Read active codes.
   1. If codes other than 253/12 or 253/2 are logged, service them first.
   2. If codes 253/12 or 253/2 are logged, and no other codes are logged, reprogram the ECM. Refer to "53.3.2 Test for Codes" .

Section 53.3.2
Test for Codes

Perform the following steps to test for codes.‪

1. Start and run the engine.
2. Read active codes with DDR.
   1. If active code 253/2 is logged, and no other codes are logged, install a test ECM. Refer to "53.3.3 Verify Repairs" .

   Note: It is recommended that a "Test" ECM be tried first to determine the need to replace the ECM. For information concerning ECM replacement, refer to section 2.9 in the service manual.

   2. If no codes are logged, troubleshooting is complete.

Section 53.3.3
Verify Repairs

Perform the following steps to verify repairs.‪

1. Start and run the engine.
   1. If no codes are logged, troubleshooting is complete.
   2. If codes are logged, contact Detroit Diesel Technical Service.