DDEC TROUBLESHOOTING
[b] If the resistance measurement is greater than 5
or open, the signal line (#111) or
return line (#112) is open. Repair the open. Refer to section 42.3.16.
Figure 42-4
Engine Harness Connector to Synchronous Sensor
42.3.4
Synchronous Reference Sensor Test
Perform the following steps to test the SRS.
1. Measure resistance of SRS across the sensor connector pins A and B.
[a] If the resistance measurement is less than or equal to 100 , refer to section 42.3.12.
[b] If the resistance measurement is greater than 200 , refer to section 42.3.12.
[c] If the resistance measurement is between 100 and 200 , refer to section 42.3.5.
42.3.5
Check Synchronous Reference Sensor Gap
Perform the following steps to check the SRS gap.
1. Bar engine until SRS is over the SRS pin.
2. Check the gap between SRS and the pin.
[a] If the gap setting is correct (0.020 - 0.040 in.), refer to section 42.3.6. A depth
micrometer can be used.
[b] If the gap setting is not correct, adjust the SRS until the gap setting is correct. If the
problem returns, the pulse wheel may be loose or bad. Refer to section 42.3.16.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
42-7
