TM 10-3930-675-24-1
TRANSMISSION SPEED SENSORS TROUBLESHOOTING - CONTINUED
0027 00
Circuit or Short Circuit to Battery Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 658 - Output Speed Sensor Failure,
4. Inspect the 760 connector and
If continuity is not present in any
Open Circuit or Short Circuit to Battery -
pins for damage and proper
one wire or connector 761 is
Continued.
connection. Check continuity
damaged, notify Sustainment
of wires 1731, 1732, and 1733
Maintenance to replace engine
(WP 0048 00-14).
and transmission wiring harness.
5. Check connector and pins.
a. Repair or replace damaged
Disconnect ECU (793). Check
connector (WP 0113 00).
the connector and ECU pins 4
b. Replace damaged ECU (793)
and 62 for damage. Check
(WP 0080 00).
continuity of wires A1731 and
c. Replace open or shorted wire.
A1732 (WP 0048 00-14).
d. Replace the 760 output speed
sensor (WP 0096 00).
Circuit to Chassis Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 659 - Output Speed Sensor Failure, 1. Ensure circuit breaker F28 is Reset circuit breaker.
Short Circuit to Chassis.
not tripped.
2. Check for voltage. Access a. If no voltage (24V) is found,
middle panel behind seat and
check
continuity
and
disconnect X173. Turn the
continuity to ground of wires
ignition on and check voltage
A472, 472 (WP 0048 00-32),
(24V) on the mounted part of
A1742B (WP 0048 00-12),
X173 pin 3 to ground.
and A1742C (WP 0048 00-
14).
b. Repair or replace damaged
connector (WP 0113 00).
c. Replace open or grounded
wire.
3. Check
for
continuity.
If the 760 output speed sensor is
Disconnect and inspect the 760
damaged or grounded, replace the
output speed sensor located on
760 output speed sensor (WP
the back side of the
0096 00).
transmission (WP 0048 00-
14). Check each pin of the
sensor for continuity to
ground.
0027 00-10
