10.5
NO DATA TO DIAGNOSTIC DATA READER
[b] If either reading is less than 5 , refer to section 10.5.5.
Figure 10-8
Diagnostic Connector
10.5.5
Check for Short
Perform the following steps to check for a short:
1. Remove the jumper wire from the DDL connector.
2. Measure resistance between sockets C1 (#901) and C2 (#900) of the vehicle harness
connector.
[a] If the resistance measurement is less than 5 , two data wires (circuit #900 or #901)
are shorted together. Repair the short and refer to section 10.5.8.
[b] If the measured resistance is greater than 5 , refer to section 10.5.6.
10.5.6
Check for Short to Ignition and Ground
Perform the following steps to check for a short to ignition and ground:
1. Remove all jumpers for the DDL connector.
2. Measure resistance between sockets A (#900) and C (ignition switch), A (#900) and E
(ground), B (#901) and E (ground), and B (#901) and C (ignition switch) of the DDL
connector.
[a] If the measured resistance is less than 5
on any reading, a short exists between the
data wires and ignition or ground. Repair the short and refer to section 10.5.8.
[b] If the measured resistance is greater than 5 , refer to section 10.5.7.
All information subject to change without notice.
10-24
6SE497 9709 Copyright © 1997 DETROIT DIESEL CORPORATION
