TM 10-3930-675-24-1
BRAKE SYSTEM TROUBLESHOOTING
THIS WORK PACKAGE COVERS
Error Code 118 - Brake System Pressure, Circuit 1 and
Error Code 120 - Brake System Pressure, Circuit 2 Fail-
Circuit 2 Failure
ure
Error Code 119 - Brake System Pressure, Circuit 1 Fail-
ure
INITIAL SETUP
References - Continued
References
Sender (A34740.0200) (WP 0048 00-36)
TM 10-3930-675-10
Brake System (WP 0048 00-51)
Current Supply (A34738.0200) (WP 0048 00-31)
NOTE
Refer to WP 0004 00 for additional troubleshooting guidance, information, and illustrations that
locate critical components.
Refer also to illustration at end of work package for component location.
Table 1. Error Code 118 - Brake System Pressure, Circuit 1 and Circuit 2 Failure
Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 118 - Brake System Pressure, Circuit 1. Check if accumulator evac-
Close accumulator evacuation
uation valves are open (WP
1 and Circuit 2 Failure.
valves.
0164 00).
2. Start engine and allow brake
If no pressure felt on service
pressure to build up. Press on
brake pedal, perform brake
the service brake pedal several
pressure tests (WP 0188 00) and
times to check for pressure.
troubleshooting (WP 0005 00).
3. Enter "EXTRA FUNC" 7(13)
A "0" at either brake circuit
in the diagnostic menu and
would indicate an open pressure
check status of both brake
switch due to low brake pressure,
circuits.
faulty pressure switch or open
circuit.
4. Check circuit breaker F3 for Reset circuit breaker as required.
trip.
5. Start engine and allow brake a. If no voltage (24V) is found,
pressure to built up. Check
proceed with step 6.
voltage (24V) at X150 pins 9
and 10 (WP 0048 00-7).
