FAN OPERATIONAL CONCERN (VARIABLE SPEED TYPE)
[a] If the connectors, pins, and terminals are not damaged, contact the OEM or fan
valve supplier for instructions on further troubleshooting. If the ECM and wiring
to the component appear to be okay, the problems could be with the control valve
or battery and wiring.
[b] If the connectors, pins or terminals are damaged, repair or replace them and
refer to section 10.9.7.
Perform the following steps to verify repairs:
1. Connect all removed connectors, etc.
2. Start and run the engine from cold to hot, while watching the fan speed operation.
[a] If the operation is normal, troubleshooting is complete.
[b] If the operation is not normal, all system diagnostics are complete. Review this
section to find the error. Refer to section 10.9.1.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION