Series 60 DDEC V Troubleshooting – Section 26.2 Troubleshooting Flash Code 16, PID 111/FMI 3

Section 26.2
Troubleshooting Flash Code 16, PID 111/FMI 3

Flash Code 16 indicates that the Engine Coolant Level Sensor (CLS/ECL Sensor) input to the ECM/ECU has exceeded 95% (normally >4.75 volts) of the sensor supply voltage.‪

This diagnostic condition is typically:‪

• Open sensor signal circuit
• Open sensor ground circuit

Section 26.2.1
Sensor Check

Perform the following steps to check the sensor.‪

1. Turn ignition OFF.
2. Disconnect the CLS/ECL Sensor connector and install a jumper between sockets A and B of the CLS/ECL Sensor harness connector.
3. Attempt to start and run engine at idle.
4. Read diagnostic tool for active codes.
   1. If active code 111/3 and any other codes except code 111/4 are logged, refer to "26.2.2 Signal Circuit Check" .
   2. If active code 111/4 and any other codes are logged, refer to "26.2.3 Signal Short to Ignition Check" .
5. Stop engine.

Section 26.2.2
Signal Circuit Check

Perform the following steps to check the signal circuit.‪

1. Turn ignition OFF.
2. Disconnect the CLS/ECL Sensor.
3. Disconnect the vehicle harness connector.
4. Measure resistance between socket H3 (#115) on the vehicle harness connector and A (#115 signal) of the CLS/ECL Sensor connector.
   1. If the resistance measurement is less than or equal to 5 Ω, go to step .
   2. If the resistance measurement is greater than 5 Ω, or the signal line #115 is open, repair the open. Refer to "26.2.4.1 Verify Repairs" .
5. Measure resistance between cavity B (battery ground) of the ECL Sensor connector and battery ground.
   1. If the resistance measurement is less than or equal to 5 Ω, refer to "26.2.3 Signal Short to Ignition Check" .
   2. If the resistance measurement is greater than 5 Ω, or open, the ground circuit is open. Repair and refer to "26.2.4.1 Verify Repairs" .

Section 26.2.3
Signal Short to Ignition Check

Perform the following steps to check for a signal short to ignition.‪

1. Disconnect the vehicle harness connector at the ECM/ECU.
2. Remove the jumper wire at the CLS/ECL Sensor harness connector.
3. Turn ignition ON.
4. Measure voltage at cavity V-38 of the CLS/ECL Sensor connector and battery ground. See Figure "Engine Coolant Level Sensor and Circuits" .
   1. If the voltage measurement is less than or equal to 6 volts, go to step 5 .
   2. If the voltage measurement is greater than 6 volts, the CLS/ECL Sensor signal line V-38 is shorted to the 12/24 volt DC line. Repair the short or replace the V-38 wire. Refer to "26.2.4.1 Verify Repairs" .
   

   Figure 1. Engine Coolant Level Sensor and Circuits

5. Inspect terminals at the vehicle harness connector (both the sensor and harness side) for bent, corroded and unseated pins or sockets. Check terminal and pin V-38 at the ECM/ECU and all terminals and pins in the CLS/ECL Sensor connector. See Figure "Vehicle Harness Connector" .
   1. If terminals and connectors are not damaged, replace the CLS/ECL Sensor. Refer to "26.2.4.1 Verify Repairs" . If this is a repeated failure of the CLS/ECL Sensor, refer to "26.2.4 Alternator Ground Check" .
   2. If terminals and connectors are damaged, repair both. Refer to "26.2.4.1 Verify Repairs" .
   

   Figure 2. Vehicle Harness Connector

Section 26.2.4
Alternator Ground Check

Perform the following steps to check the alternator ground.‪

1. Connect all connectors.
2. Remove alternator belt or disable alternator from charging.
3. Start and run the engine.
4. Read logged codes.
   1. If no codes are logged, repair the alternator ground circuit. Refer to "26.2.4.1 Verify Repairs" .
   2. If codes are logged, replace CLS/ECL Sensor. Refer to "26.2.4.1 Verify Repairs" .

Section 26.2.4.1
Verify Repairs

‪

Perform the following steps to verify the repairs.‪

1. Turn ignition OFF. Reconnect all connectors.
2. Turn ignition ON. Clear diagnostic tool codes.
3. Start and run the engine for one minute.
4. Stop the engine.
5. Check diagnostic tool for codes.
   1. If no codes are displayed, troubleshooting is complete.
   2. If code 111/3 is not logged, and other codes are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .
   3. If code 111/3 is logged, and other codes are logged, refer to "26.2.1 Sensor Check" , and perform tasks.