TM 10-3930-675-20-1
0016 00-9
INPUT AND OUTPUT SIGNALS FOR STEERING ECU (792) TROUBLESHOOTING - CONTINUED
0016 00
Table 13. Error Code 420 - Crab Steering Selection Switch, Circuit Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 420 - Crab Steering Selection Switch,
Circuit Failure - Continued
5. Check continuity between
connector X160 pin 15 and
connector X177 pin 15.
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.
6. Check continuity between
connector X177 pin 15 and
steering ECU (792) connector
pin 45.
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.
Table 14. Error Code 422 - Cab in Transport Position Proximity Switch, Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 422 - Cab in Transport Position
Proximity Switch, Circuit Failure
1. Check voltage at connector
X175 pin 1. Voltage should be
22-26V.
If voltage is not as specified,
check wires at connectors X174,
X175, X195, and X197 for
damage.
Repair
or
replace
connectors (WP 0111 00).
2. Check continuity to chassis at
connector X175 pin 3.
If continuity is not present, repair
or replace connectors (WP 0111
00).
3. Place a piece of metal close to
proximity switch 7210. Check
voltage at connector X175 pin
2.
a. If voltage is not present,
replace proximity switch (WP
0075 00).
b. If voltage is present, remove
metal piece. Voltage should
not be present. If voltage is
present, replace proximity
switch (WP 0075 00).
4. Check continuity between
connector X175 pin 2 and
steering ECU (792) connector
pin 43.
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.