Lycoming TEO-540-C1A Maintenance Manual page 478

Fault ID 192
Primary: EOP (Engine Oil Pressure)
Fault
Description
Secondary: Engine ID Circuit Fault*
This fault occurs if the Raw voltage observed on the input is outside the expected window
defined by the calibratable Highest and Lowest Valid Raw voltage values.
This does not distinguish between Open and Short Circuit Faults as any of the following
Root Cause
failures would result in the Raw voltage outside the expected voltage window:
-
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active?
If yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. Inspect sensor, and lines for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors or hoses, burned or broken sensors). If damaged, replace the sensor per the "Sensor
Replacement Procedure" in Chapter 72-70. If no damage is found, go to step 4.
4. Inspect harness connection for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors). Contact Lycoming if harness damage is found. If no damage found, go to step 5.
5. Complete a continuity test of the harness from the harness sensor connector to the ECU connector using
the engine system schematic. If the continuity check fails, isolate to affected harness by disconnecting
the firewall connection, then contact Lycoming Engines. If the continuity checks good, replace the
sensor. If fault persists, replace the ECU.
*NOTE: If the secondary fault is active, go to troubleshooting procedures for Fault ID 256.
Fault ID 193
Primary: FRP (Fuel Rail Pressure)
Fault
Description Secondary: FPP (Fuel Pump Pressure)
This fault occurs if the Raw voltage observed on the input is outside the expected window
defined by the calibratable Highest and Lowest Valid Raw voltage values.
This does not distinguish between Open and Short Circuit Faults as any of the following
Root Cause
failures would result in the Raw voltage outside the expected voltage window:
-
1. Run the engine in accordance with the engine and aircraft maintenance manuals. Is the fault active? If
yes, go to step 3. If no, go to step 2.
2. Using the FST, download active and service fault logs, then clear fault logs and monitor engine
operation for the fault to repeat.
3. Inspect sensor, and lines for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors or hoses, burned or broken sensors). If damage is found, replace the damaged part per the
"Sensor Replacement Procedure" in Chapter 72-70. If no damage is found, go to step 4.
4. Inspect harness connection for any damage (eg...burned, broken or frayed wires, cracked or broken
connectors). Contact Lycoming if harness damage is found. If no damage found, go to step 5.
5. Swap fuel rail pressure sensor with fuel pump pressure sensor and run the engine. Does the fault move
with the sensor? If yes, replace the sensor. If no, go to step 6.
6. Complete a continuity test of the harness from the harness sensor connector to the ECU connector using
the engine system schematic. If the continuity check fails, isolate to affected harness by disconnecting
the firewall connection, then contact Lycoming Engines. If the continuity checks good, replace the
sensor. If fault persists, replace the ECU.
Appendix D
Page 448
Fault Group
Circuit Fault
-
Open Circuit Short to 5V
Troubleshooting Steps
Fault Group
Circuit Fault
Circuit Fault
-
Open Circuit Short to 5V
Troubleshooting Steps
TEO-540-C1A Engine Maintenance Manual
25 Fault Name
Fault Lamp
-
Short to VPwr
25 Fault Name
Fault Lamp
-
Short to VPwr
© 2018 Avco Corporation. All Rights Reserved
[FAULT: AN23 circuit]
TLO
-
Short to GND
[FAULT: AN24 circuit]
TLO
-
Short to GND
November 2018