TM 10-3930-675-20-1
0016 00-1
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING
0016 00
THIS WORK PACKAGE COVERS
Error Code 401 - Transmission Neutral Signal from
Steering ECU (792) Failure
Error Code 404 - Short Circuit Failure of 2WD Steering
Control Lamp
Error Code 405 - Short Circuit Failure of 4WD Steering
Control Lamp
Error Code 406 - Short Circuit Failure of Crab Steering
Control Lamp
Error Code 408 - Short Circuit Failure of Unlocked
Twistlock Control Lamp
Error Code 409 - Short Circuit Failure of Locked Twist-
lock Control Lamp
Error Code 410 - Short Circuit Failure of Alinement
Control Lamp
Error Code 412 - Short Circuit Failure of Ether Start
Valve
Error Code 413 - Short Circuit Failure of Boom Folding
Supply Valve
Error Code 416 - Steering Pressure Sensor Circuit Fail-
ure
Error Code 418 - 2WD Steering Selection Switch, Cir-
cuit Failure
Error Code 419 - 4WD Steering Selection Switch, Cir-
cuit Failure
Error Code 420 - Crab Steering Selection Switch, Cir-
cuit Failure
Error Code 422 - Cab in Transport Position Proximity
Switch, Circuit Failure
Error Code 423 - Ether Start Kit Switch, Circuit Failure
Error Code 427 - Tophandler Work Light Switch, Cir-
cuit Failure
Error Code 450 - Temperature Inside Steering ECU
(792) Above Critical Threshold [184°F (85°C)]
INITIAL SETUP
References
TM 10-3930-675-10
Current Supply (A34738.0200) (WP 0199 00-31)
Auxiliary Pump (A34746.0200) (WP 0199 00-47)
References - Continued
ECS Electrical Servo (A34648.0200) (WP 0199 00-5)
ECS Steering (A34651.0200) (WP 0199 00-16)
ECS Hydraulics (A34654.0200) (WP 0199 00-29)
ECS Attachment (A34652.0200) (WP 0199 00-23)
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that locate criti-
cal components.
Table 1. Error Code 401 - Transmission Neutral Signal from Steering ECU (792) Failure
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 401 - Transmission Neutral Signal
from Steering ECU (792) Failure
Check
continuity
between
steering ECU (792) connector
pin 71 and transmission ECU
(793) connector pin 44.
a. If continuity between pins,
repair or replace connectors
(WP 0111 00).
b. If
continuity
(short)
to
chassis, repair or replace
connectors (WP 0111 00).
c. If continuity is present, notify
SRA.
