146/1 - Egr Temperature Below Normal - Detroit Diesel MBE 900 Technician Manual

PRELIMINARY
4.3.2.2 146/1 — EGR Temperature below Normal
Perform the following steps to troubleshoot EGR temperature below normal:
1. Measure the resistance between pins 1 and 3 on the EGR temperature sensor.
See Figure 4-3.
Figure 4-3 EGR Temperature Sensor Pins and 55-Pin Connector Wires
[a] If resistance is less than 3 , replace the EGR temperature sensor. Erase the fault
code memory and verify repairs. Refer to section 4.3.2.6.
[b] If resistance is greater than 3 , go to step 2.
2. Measure the resistance between pin 28 of the 55-pin connector and pin 1 of the EGR
temperature sensor connector. See Figure 4-3.
[a] If resistance is less than 3 , repair the short in the wire. Erase the fault code memory
and verify repairs. Refer to section 4.3.2.6.
[b] If resistance is greater than 3 , go to step 3.
3. Measure the resistance between pin 22 of the 55-pin connector and pin 3 of the EGR
temperature sensor connector. See Figure 4-3.
[a] If resistance is less than 3 , repair the short in the wire. Erase the fault code memory
and verify repairs. Refer to section 4.3.2.6.
[b] If resistance is greater than 3 , go to step 4.
All information subject to change without notice. (Rev. 5/05)
7SE940 0505 Copyright © 2005 DETROIT DIESEL CORPORATION
MBE EGR TECHNICIAN'S GUIDE
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