Section 55.3
SPN 641/FMI 5
This diagnosis is typically an open circuit.
Section 55.3.1
Open Circuit Check
Check for an open circuit as follows:
- Disconnect the wastegate control actuator connector.
- Turn the ignition ON (key ON, engine OFF).
- Measure the voltage between pins 1 and 4 of the wastegate control actuator connector.
- If the voltage is between 11 and 13 volts, go to step 5 .
- If the voltage is less than 11 volts, go to step 4 .
Figure 1. Wastegate
- Measure the voltage between pin 4 of the wastegate control actuator connector and ground.
- If the voltage is between 11 and 13 volts, then repair the open in the wire between pin 38 of the 120–pin MCM connector and pin 1 of the wastegate control actuator connector. Refer to "55.3.1.1 Verify Repairs" .
- If the voltage is less than 11 volts, Repair the open in the wire between pin 93 of the 120–pin MCM connector and pin 4 of the wastegate control actuator connector.
- Turn the ignition OFF.
- Disconnect the 120–pin MCM connector.
- Measure the resistance between pin 3 of the wastegate control actuator connector and pin 35 of the 120–pin MCM connector.
- If the resistance is less than 3 Ω, repair the open circuit in the wire between pin 3 of the wastegate control actuator connector and pin 35 of the 120–pin MCM connector. Refer to "55.3.1.1 Verify Repairs" .
- If the resistance is greater than 5Ω, replace the wastegate control actuator . Refer to "55.3.1.1 Verify Repairs" .
Section 55.3.1.1
Verify Repairs
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 MBE 4000 DDEC VI Troubleshooting Guide - 6SE568 |
| Generated on 10-13-2008 |