Spn 412/Fmi 3 - Detroit Diesel Series 60 DDEC VI Troubleshooting Manual

16.1 SPN 412/FMI 3

This diagnosis is typically EGR Temperature Sensor circuit failed high or open circuit.
16.1.1 Open Circuit Check
Check as follows:
1. Check for multiple codes.
[a] If codes 1636/3, 403/3 and 412/3 are active at the same time, repair the open circuit
between pin 52 of the 120–pin MCM Connector and pin 1 of the EGR, IMT and TCO
temperature sensors. Refer to section 16.1.1.1.
[b] If only fault 412/3 is active, go to step 2.
2. Disconnect the EGR Temperature Sensor.
3. Measure the resistance across pins 1 and 2 of the EGR Temperature Sensor.
[a] If the resistance is greater than 4k Ω, replace the EGR Temperature Sensor.
Refer to section 16.1.1.1.
[b] If the resistance is less than 4k Ω, go to step 4.
4. Turn the ignition ON (key ON, engine OFF).
5. Measure the voltage between pins 1 and 2 of the EGR Temperature Sensor harness
connector.
[a] If the voltage is between 2.75 and 3.25 volts, go to step 7.
[b] If the voltage is less than 2.75 volts, go to step 6.
6. Measure the voltage between pin 2 of the EGR Temperature Sensor harness connector
and ground.
[a] If the voltage is between 2.75 and 3.25 volts, repair the open circuit between pin 1 of
the EGR Temperature Sensor harness connector and pin 52 of the 120–pin MCM
connector. See Figure 16-1. Refer to section 16.1.1.1.
All information subject to change without notice.
PRELIMINARY 6SE567 0512 Copyright © 2005 DETROIT DIESEL CORPORATION
DDEC VI SERIES 60 TROUBLESHOOTING GUIDE
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