TM 10-3930-675-24-1
ENGINE PRESSURE SENSOR TROUBLESHOOTING - CONTINUED
0023 00
Table 1. Error Code 1122 - Intake Manifold Pressure Sensor
Circuit Failure Troubleshooting Procedures - Continued.
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Error Code 1122 - Intake Manifold Pressure 6. Disconnect all sensors from
Sensor Circuit Failure - Continued.
sensor harness except intake
manifold pressure sensor.
Reconnect sensor harness
connector to ECU.
7. Disconnect coolant level
sensor jumper wires. Install
breakout cable. Place ignition
switch in ON position.
8. Check
intake
manifold If voltage is not as specified,
pressure
sensor
signal proceed to following steps.
voltage.
Check
voltage
between leads C and B of
breakout cable. Voltage
should be 0.70 to 1.40V.
0.70-1.40V
A
C
B
9. Place ignition switch in OFF
position, disconnect sensor
harness from engine ECU,
and disconnect all sensors and
coolant level jumper wires no.
5 and 6. Disconnect intake
manifold pressure sensor.
a. Measure resistance from If engine harness requires
sensor harness connector pin replacement, notify Sustainment
40 to all other pins in Maintenance.
connector.
should be greater than 100k
Ohms.
0023 00-5
