TM 10-3930-675-24-1
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0017 00
Switch, Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
NOTE
Error Code 420 - Crab Steering Selection Switch,
Circuit Failure.
Error code 420 is an information type error code. It
may not activate for the operator. Enter DIAG STEER-
ING 2(16) in the Diagnostic menu to verify the code or
enable the information type codes in the initialization
menu. Input error type codes can be activated if the
voltage input is not stable due to a bad connection.
1. Inspect the crab steering Replace damaged crab steering
selection switch for damage switch (WP 0082 00).
and connection.
2. Inspect connectors X177, a. Repair or replace damaged
X160,
and
X153
for
connector (WP 0113 00).
connection or damage.
b. If connectors are found to be in
good condition, check wires
1529D, 15315, A15315, and
16015 (WP 0048 00-18) for
c. Repair or replace open or
damaged wire.
3. Check ECU (792) pin 45 for a. Check wire A17715 for
connection or damage (WP
continuity (WP 0048 00-18).
0048 00-18).
b. Replace damaged ECU (792)
terminal board (WP 0080 00).
4. Check
wire
connection.
Replace ECU (792) (WP 0080
Disconnect wire A17715 from
00) if error code 420 is still
ECU (792) and recheck for
active.
active 420 error code.
0017 00-18
