SPN 2629/FMI 21
This condition is typically temperature too low from the turbo outlet.
Check as follows:
- Disconnect the TCO Sensor.
- Measure the resistance across pins 1 and 2 of the TCO Sensor.
- Turn the ignition ON (key On, engine OFF).
- Measure the voltage between pins 1 and 2 of the TCO Sensor harness connector.
- Measure the voltage between pin 2 of the TCO Sensor harness connector and ground.
- If the voltage is between 2.75 and 3.25 volts, repair the open circuit between pin 1 of the TCO Sensor harness connector and pin 52 of the 120–pin MCM connector. Refer to "188.8.131.52 Verify Repairs" .
- If the voltage is less than 2.75 volts, repair the open circuit between pin 2 of the TCO Sensor harness connector and pin 112 of the 120–pin MCM connector. Refer to "184.108.40.206 Verify Repairs" .
- Inspect the intake air and turbocharger outlet plumbing for leaks or cracks.
- Repair if necessary. Refer to "220.127.116.11 Verify Repairs" .
- If no repairs are necessary, go to the next step.
- Perform the turbo hysterisis test
- Disconnect the Turbo Out Temperature Sensor.
Verify repairs as follows:
- Turn ignition OFF.
- Reconnect any electrical connections that were disconnected to perform the diagnosis.
- Clear codes with DDDL 7.0 or latest version.
- Start and bring engine up to operating temperature (over 140°F/60°C).
- Verify operation is satisfactory and no warning lamps illuminate. If warning lamps illuminate, troubleshoot the codes. If assistance is required, call the Detroit Diesel Customer Support Center at 313–592–5800.
|EPA07 Series 60 DDEC VI Troubleshooting Guide - 6SE567|
|Generated on 10-13-2008|