TM 10-3930-675-24-1
ENGINE AMBIENT AIR PRESSURE SENSOR AND CIRCUITS TROUBLESHOOTING - CONTINUED
0022 00
Table 3. Error Code 1295 - Ambient Air Pressure Sensor Circuit Failure Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1295 - Ambient Air Pressure Sensor Perform Troubleshooting
Circuit Failure.
procedure for error codes 1221
and 1222 in this work package.
Table 4. Error Code 1298 - High Intake Air Restriction or
Circuit Failure (RESET or USMC Only) Troubleshooting Procedures.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1298 - High Intake Air Restriction or 1. Check air filter restriction
If air filter indicator is tripped or
Circuit Failure (RESET or USMC Only).
indicator
for
restriction
indicates a restriction of 20 in.
indication (TM 10-3930-675-
water column or more, service or
10).
replace the air filter element.
NOTE
If the intake air restriction is at or above 20 in. water
column the engine will de-rate to 1,000 RPM and acti-
vate ERROR CODE 1298.
2. Locate the air pressure sensor a. Reconnect
disconnected
(754) on the intake pipe
sensor.
crossing over the engine valve b. Replace damaged air pressure
sensor (WP 0094 00).
cover. Inspect sensor for
damage and connection.
3. Check
for
continuity.
If air pressure sensor does not
Disconnect the air pressure
have continuity, replace air
pressure sensor (754) (WP 0094
sensor and check continuity
00).
between the two pins of the
sensor. There should be
continuity when the engine is
not running.
4. Follow the harness of the Repair or replace damaged
sensor down the side of the connector (WP 0113 00).
engine block to the connector
where the sensor joins the
engine harness (switched
output A connector). Inspect
connector for connection or
damage.
0022 00-13
