TROUBLESHOOTING WITH A DIAGNOSTIC CODE - CONTINUED
Table 3. Powertrain Control - Continued.
CID FMI CODE
TEST OR INSPECTION
(b) All related ECMs remain disconnected
0590 09 - Continued.
from wiring harness.
(c) Check resistance of CAT Data Link
circuit in the wiring harness:
tor contact J1-8 (wire 944-OR) of
engine ECM and connector contact
J1-10 (wire 944-OR) of powertrain
(2) Measure resistance between connec- 1. If resistance is less than 5 Ohms, go to
tor contact J1-9 (wire 945-BR) of
engine ECM and connector contact 2. If resistance is greater than 5,000 Ohms,
J1-20 (wire 945-BR) of powertrain
CAT Data Link circuit is open in wiring
harness. Replace wiring harness in
question (WP 0195 00 thru WP 0201
6. Check for additional diagnostic codes for
(a) Turn engine start and battery
disconnect switches to OFF position
(b) One at a time, reconnect each ECM that
uses CAT Data Link.
(c) Turn battery disconnect and engine
start switches to ON position (TM 5-
(d) After each ECMs has been
1. If diagnostic codes are not present for
reconnected, check for diagnostic
the other ECMs, exit this procedure and
codes logged against that ECM.
repeat procedure again. If failure is not
found, replace powertrain ECM (WP
2. If diagnostic codes are present for other
ECMs, exit this procedure and repeat
procedure. If failure is not found,
replace engine ECM (WP 0057 00).