[b] If the resistance measurement between sockets P3 and Y2 is greater than 5
and the resistance measurement between sockets P3 and a good ground is greater
than or equal to 5
or open, refer to section 15.3.8.
ECM Engine Harness Connector
Check for Short
Perform the following steps to check for a short.
1. Turn ignition OFF.
2. Disconnect the engine harness connector at the ECM.
3. Measure resistance between sockets R2, (#120) and Y2 (#452) on the engine harness
connector. See Figure 15-6.
4. Measure resistance between socket R2 and a good ground.
[a] If the resistance measurement between sockets R2 and Y2, or R2 and battery (-) is
less than or equal to 5 , the signal line (#120) is shorted to the return line (#452) or
battery ground. Repair the short. Refer to section 15.3.10.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION