TM 10-3930-675-24-1
MISCELLANEOUS TRANSMISSION FAILURE TROUBLESHOOTING - CONTINUED
0029 00
Table 2. Error Code 622 - Feedback Signal from 2WD/4WD
Switch Not Correct Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 622 - Feedback Signal from 2WD/ 1. Check for proper signals. Enter If signals do not change, continue
4WD Switch Not Correct.
DIAG GEARBOX 8(12) in the with next steps.
diagnostic menu and check the
drive position signals while
switching between 2WD and
4WD steering modes.
2. Ensure circuit breaker F28 is Reset circuit breaker.
not tripped.
3. Check for voltage. Access a. If no voltage (24V) is found,
middle panel behind seat and
check continuity of wires
disconnect X173. Turn the
ignition on and check voltage
(24V) on the mounted part of
X173 pin 3 and pin 10 to
14).
ground.
b. Repair or replace damaged
connector (WP 0113 00).
c. Replace open or shorted wire.
4. Check voltage (24V) at X173 If voltage checks are not correct:
pin 11 (WP 0048 00-14) with a. Locate the 7207 sensor at the
the engine running and
bottom of the transmission.
switching back and forth
Check the connector for
between 2WD and 4WD
proper connection to 7207
steering modes. Voltage (24V)
sensor. Check continuity of
should be present while in
wires 17310 and 17311 (WP
2WD and no voltage while in
4WD steering mode.
b. If wires 17310 and 17311 are
open or shorted, notify
sustainment maintenance to
replace
engine
and
transmission wiring harness.
c. If connection and wire
7207 sensor (WP 0095 00).
5. Check the connector and ECU a. Repair or replace damaged
pin 29 for damage. Disconnect
connector (WP 0113 00).
ECU (793). Check continuity b. Replace damaged ECU (793)
(WP 0080 00).
14).
c. Replace open or shorted wire.
0029 00-3