TM 10-3930-675-24-1
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0017 00
Lamp Short, Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 408 - Unlocked Twistlock Control
Lamp, Short Circuit Failure.
Error code 408 is an information type error code. It
may not activate for the operator. The operator may
report the indicator light is not working. Enter DIAG
STEERING 2(16) in the Diagnostic menu to verify the
code or enable the information type codes in the initial-
ization menu.
1. Inspect the twistlock indicator Replace damaged twistlock
lights for damage.
indicator light(s) (WP 0073 00).
2. Check light fixtures. Access Replace damaged or shorted light
twistlock indicator lights (WP bulb, socket, or wiring (WP 0073
0073 00) in the steering 00).
column console. Inspect
twistlock
indicator
light
sockets, bulbs, and wiring.
3. Check
for
continuity. a. If continuity to ground is
Disconnect connector X177
found, disconnect X153 and
located in the middle panel.
recheck.
Check for continuity to ground b. If continuity to ground is still
on the loose part of X177 at pin
found, check wires 1604 and
4 (WP 0048 00-19). There
A1534 for continuity to
should not be continuity to
ground (WP 0048 00-19).
ground.
c. Replace grounded X177 to
X160 cable or grounded wire
A1534.
4. Check for continuity to ground a. If continuity to ground is
on the loose part of X153 at pin
found, replace the X153 to
4 (WP 0048 00-19). There
steering column harness (WP
should not be continuity to
0073 00).
ground.
b. If continuity to ground is not
found, check wire A1774 for
continuity to ground (WP
0048 00-19).
c. Replace
grounded
wire
A1774.
5. Check ECU (792) pin 64 for a. Replace damaged ECU (792)
connection or damage (WP
terminal board (WP 0080 00
0048 00-19)
00).
b. Replace ECU (792) (WP 0080
00).
0017 00-9
