Series 60 DDEC V Troubleshooting – Section 24.2 Troubleshooting Flash Code 14, PID 110/FMI 3

Section 24.2
Troubleshooting Flash Code 14, PID 110/FMI 3

This diagnostic condition is typically an open sensor signal or return circuit for the Engine Coolant Temperature Sensor.‪

Note: This code will only be logged during warm engine operation.

Section 24.2.1
Engine Coolant Temperature Sensor Check

Perform the following steps to check the Engine Coolant Temperature Sensor (CTS/ECT Sensor).‪

1. Turn vehicle ignition OFF.
2. Disconnect CTS/ECT Sensor and install a jumper between the CTS/ECT Sensor connector sockets 1 and 2. See Figure "Engine Coolant Temperature Sensor Circuits" .
   

   Figure 1. Engine Coolant Temperature Sensor Circuits

3. Turn vehicle ignition ON.
4. Read active codes.
   1. If code p 110/4 or any other codes except p 110/3 are logged, refer to "24.2.3 Open Line Check " .
   2. If code p 110/3 is logged and any codes except code p 110/4 are logged, refer to "24.2.2 Check for Signal Short to +5 Volt Line" .

Section 24.2.2
Check for Signal Short to +5 Volt Line

Perform the following steps to check for a short to the +5 volt line.‪

1. Turn ignition OFF. Remove jumper wire.
2. Disconnect the Engine Harness connector at the ECM/ECU.
3. Measure resistance between sockets E-5 and E-26, E-5 and E-12 on the Engine Harness connector. See Figure "ECM/ECU Engine Harness Connector" .
   

   Figure 2. ECM/ECU Engine Harness Connector

   1. If the resistance measurement is greater than 5 Ω or open, go to step 4 .
   2. If the resistance measurement is less than or equal to 5 Ω, the signal line E5 is shorted to the engine +5 volt line E-26 or E-12. Repair the short and refer to "24.2.3.1 Verify Repairs" .
4. Check terminals at the CTS/ECT Sensor connector (both sensor and harness side) for damage; bent, corroded and unseated pins or sockets. See Figure "Engine Coolant Temperature Sensor Circuits" .
   1. If terminals and connectors are in good condition, replace the CTS/ECT Sensor. Refer to "24.2.3.1 Verify Repairs" .
   2. If the terminals and connectors are damaged, repair them. Refer to "24.2.3.1 Verify Repairs" .

Section 24.2.3
Open Line Check

Perform the following steps to check for an open line.‪

1. Turn ignition OFF.
2. Disconnect the Engine Harness connector at the ECM/ECU. Leave the jumper wire between A and B of the temperature sensor connector.
3. Measure resistance between sockets E5 and E-15 on the Engine Harness connector. See Figure "ECM/ECU Engine Harness Connector" .
   1. If the resistance measurement is less than or equal to 5 Ω, go to step 4 .
   2. If the resistance measurement is greater than 5 Ω or open, the signal line E–5 or return line E-15 is open. Repair the open. Refer to "24.2.3.1 Verify Repairs" .
4. Check terminals at the ECM/ECU Engine Harness connector (both ECM/ECU and harness side) for damage: bent, corroded and unseated pins or sockets. See Figure "ECM/ECU Engine Harness Connector" .
   1. If terminals or connectors are damaged, repair them. Refer to "24.2.3.1 Verify Repairs" .
   2. If terminals and connectors are not damaged, replace the temperature sensor.

Section 24.2.3.1
Verify Repairs

Perform the following steps to verify repairs.‪

1. Turn vehicle ignition OFF. Reconnect all connectors.
2. Turn vehicle ignition ON. Clear codes.
3. Start and run the engine for eight minutes. Stop the engine.
4. Check diagnostic tool for codes.
   1. If no codes are logged, troubleshooting is complete.
   2. If code p 110/3 or p 175/3 and any other codes are logged, review this section to find the error. Refer to "24.2 Troubleshooting Flash Code 14, PID 110/FMI 3" for p 110/3 and section "24.3 Troubleshooting Flash Code 14, PID 175/FMI 3" for p 175/3.
   3. If any codes except code p 110/3 or p 175/3 are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .