146/0 - Egr Temperature Above Normal - Detroit Diesel MBE 900 Technician Manual

PRELIMINARY
4.3.2.1 146/0 — EGR Temperature above Normal
Perform the following steps to troubleshoot EGR temperature above normal:
1. Disconnect the EGR temperature sensor connector and check for active fault codes.
See Figure 4-2.
Figure 4-2 EGR Temperature Sensor Pins and 55-Pin Connector Wires
[a] If fault code s 146/0 is the only active code, repair the short between wires for
pins 28 to 1 and pins 22 to 3. Erase the fault code memory and verify repairs.
Refer to section 4.3.2.6.
[b] If fault code s 146/1 is active code, replace the EGR temperature sensor. Erase the
fault code memory and verify repairs. Refer to section 4.3.2.6.
[c] If fault code s 146/0 is still active code, go to step 2.
2. Bridge pin 1 of the EGR temperature sensor connector to ground and check for active fault
codes. See Figure 4-2.
[a] If fault code s 146/0 is active, repair open circuit in wire between pin 28 of the 55-pin
connector and pin 1 of sensor connector.
[b] If fault code s 146/0 is no longer active, erase fault code memory and verify repairs.
Refer to section 4.3.2.6.
[c] If fault code s 146/0 is still active, go to step 3.
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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