DDEC TROUBLESHOOTING
[b] If measured resistance is less than or equal to 10,000 , the signal line #111 is
shorted to the return line #112. Repair the short. Refer to section 41.3.15.
41.3.10 Open Synchronous Reference Sensor Line Check
Perform the following steps to check for an open SRS line.
1. Disconnect the SRS connector.
2. Install a jumper wire between sockets A and B of the SRS harness connectors.
3. Measure resistance between sockets S1 and S2 on the engine harness connector.
[a] If measured resistance is less than or equal to 5 , refer to section 41.3.11.
[b] If measured resistance is greater than 5 , or open, the signal line #111 or return line
#112 is open. Repair the open and refer to section 41.3.15.
41.3.11 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 measured resistance is less than or equal to 100 , refer to section 41.3.13.
[b] If measured resistance is greater than 200 , refer to section 41.3.13.
[c] If measured resistance is between 100 and 200 , refer to section 41.3.7.
41.3.12 Check Timing Reference Sensor Connectors
Perform the following steps to check TRS connectors.
1. Check terminals at the TRS (both the TRS and harness side) for damage: bent, corroded,
and unseated pins or sockets. See Figure 41-6.
[a] If terminals and connectors are damaged, repair them. Refer to section 41.3.15.
All information subject to change without notice.
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
41-9
