TM 1-2840-252-23-3
G-38
FAULT CODE E1, T4.5 SENSOR EXPANDED INSTRUCTIONS
Refer to numbered steps in figure 124.
Step 3.
Check harness connector PL3 (figure 201) at DECU, and J19 at T4.5 harness for tight connections.
Step 4.
Disconnect connectors PL3 and J19 to check pins and sockets.
Step 6.
With PL3 disconnected, check resistance of T4.5 sensor at harness PL3 connector sockets and GG (figure
v
Step 7.
To measure resistance of T4.5 thermocouple probe, disconnect one leg of probe from the bus bar. Measure
resistance. Reverse polarity and measure resistance again. Average the two readings to obtain final results.
(Note: An analog ohmmeter is recommended for measuring probe resistance.)
Step 8.
With PL3 and T4.5 gauge disconnected, check resistance of T4.5 harness at harness PL3 connector sockets
u and a (figure 202). Limit is >1 MΩ.
Step 9.
Before tightening harness connectors PL3 and P19, be sure that keyways in harness connectors are aligned
with keyways in component connectors.
Step 12.
With J19 disconnected, check resistance of T4.5 sensor at sensor P19 connector sockets A and B (figure
Step 17.
Refer to airframe manufacturer's procedure for diagnosing and replacing harness.
Step 19.
Refer to manufacturer's procedure for diagnosing and replacing harness.
Step 20.
Refer to manufacturer's procedure for diagnosing and replacing T4.5 sensor.
Step 23.
Refer to manufacturer's procedure for diagnosing and replacing harness or T4.5 gauge.
Step 24.
Refer to manufacturer's procedure for diagnosingand replacing harness.
G-79
