Detroit Diesel MBE 900 Technician Manual page 58

CODES
4. Check the resistance between pin 50 of the 55-pin connector and pin 1 of the EGR valve
connector. See Figure 4-4.
[a] If the resistance is greater than 3 , repair the open circuit in the wire between pin 50
of the 55-pin connector and pin 1 of the EGR valve connector. If fault code s 146/2 is
no longer active, erase fault code memory and verify repairs. Refer to section 4.3.2.6.
[b] If fault code s 146/2 is still active, go to step 5.
5. Check all contacts and connections. Remove corrosion as required. Check for active
fault codes.
[a] If fault code s 146/2 is no longer active, erase fault code memory and verify repairs.
Refer to section 4.3.2.6.
[b] If fault code s 146/2 is still active, go to step 6.
6. Check coolant usage.
[a] If coolant usage indicates a leak, perform an EGR Cooler Inspection.
Refer to appendix C, Service Information Letter 04 TS - 38. Clean and replace
parts as indicated by inspection. Erase fault code memory and verify repairs.
Refer to section 4.3.2.6.
[b] If coolant usage is normal and fault code s 146/2 is still active, contact the Detroit
Diesel Customer Support Center at 313-592-5800.
4-16
All information subject to change without notice. (Rev. 5/05)
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