21.3
TROUBLESHOOTING FLASH CODE 21
[b] If the resistance is less than or equal to 100 , the signal line (#417) is shorted to the
vehicle +5 volt line (#916). Repair the short and refer to section 21.3.10.
Figure 21-4
ECM Vehicle Harness Connector
21.3.8
Check for Short to Battery
Perform the following steps to check for a short to the battery.
1. Remove both fuses to the ECM.
2. Disconnect the 5-way power harness and vehicle harness connectors at the ECM.
3. Measure resistance between socket D2 on the vehicle harness connector and the 5-way
power connector sockets A and C. See Figure 21-5.
[a] If the resistance is greater than 100 , refer to section 21.3.9.
All information subject to change without notice.
21-8
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
