DDEC VI SERIES 60 TROUBLESHOOTING GUIDE
35.1 SPN 975/FMI 3
This fault code indicates that there is a short to power.
35.1.1
Short to Power Check
Check as follows:
1. Turn the ignition OFF.
2. Disconnect the fan control solenoid connector.
3. Turn the ignition ON (key On, engine OFF).
4. Measure the voltage between pin 1 of the fan control solenoid connector and ground.
[a] If the voltage is greater than 11.5 volts, repair the short to power between pin 1
of the fan control solenoid connector and pin 33 of the 120–pin MCM connector.
Refer to section 35.1.2.1.
[b] If the voltage is less than 11.5 volts, refer to section 35.1.2.
35.1.2
Voltage Check
The voltage check performed indicate that you should not be getting a code. The following
is a recheck before requesting a new MCM.
1. Turn the ignition OFF. Reconnect all connectors.
2. Turn ignition ON. Clear codes with diagnostic tool.
3. Start and run the engine for one minute. Stop engine.
4. Turn the ignition OFF.
5. Disconnect the fan control solenoid connector.
6. Turn the ignition ON (key On, engine OFF).
7. Measure the voltage between pin 1 of the fan control solenoid connector and ground.
[a] If the voltage is greater than 11.5 volts, repair the short to power between pin 1
of the fan control solenoid connector and pin 33 of the 120–pin MCM connector.
Refer to section 35.1.2.1.
[b] Of the voltage is less than 11.5 volts, contact the Detroit Diesel Customer Support
Center (313–592–5800) for authorization to replace the MCM.
35.1.2.1
Verify Repairs
Verify repairs as follows:
1. Turn the ignition OFF and reconnect all connectors.
2. Turn the ignition ON, and clear codes.
All information subject to change without notice.
PRELIMINARY 6SE567 0512
Copyright © 2005 DETROIT DIESEL CORPORATION
35-3
Summary of Contents for Series 60 DDEC VI
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Page 89: ...4 SPN 84 VEHICLE SPEED SENSOR Section Page 4 1 SPN 84 FMI 3 4 3 4 2 SPN 84 FMI 4 4 4 ...
Page 93: ...5 SPN 86 ADAPTIVE CRUISE CONTROL FAULT Section Page 5 1 SPN 86 FMI 14 5 3 ...
Page 201: ...21 SPN 625 CAN FAULT Section Page 21 1 SPN 625 FMI 2 9 10 13 14 21 3 21 2 SPN 625 FMI 4 21 5 ...