Series 60 DDEC V Troubleshooting – Section 26.3 Troubleshooting Flash Code 16, PID 111/FMI 5

Section 26.3
Troubleshooting Flash Code 16, PID 111/FMI 5

Flash Code 16 indicates that the Add Engine Coolant Level Sensor (CLS/AECL Sensor), part of the Maintenance Alert System (MAS) see Figure "Add Coolant Level Sensor – Maintenance Alert System" , 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

Listed in Table "Troubleshooting Add Engine Coolant Level Sensor" , are the flash codes for ACLS/AECL Sensor problems.‪

Flash‪ Code‪	PID‪ FMI‪	Description‪	Typical Cause‪
13‪	111/6‪	ACLS/AECL Sensor failed low‪	Signal wire (#906) shorted low (ground)‪
16‪	111/5‪	ACLS/AECL Sensor failed high‪	Open or poor ground. Open signal wire‪
43‪	111/1‪	Coolant level low (ACLS/AECL Sensor)‪	Coolant level below probe‪
89‪	111/12‪	ACLS/AECL Sensor Fault‪	Coolant reported low on main CLS/ECL Sensor, with ACLS/AECL Sensor okay‪

Section 26.3.1
Check Sensor

Follow these steps to check the sensor:‪

1. Unplug the ACLS/AECL Sensor.
2. Insert a jumper between cavities A and B of the sensor connector.
3. Start the engine.
4. Plug in the diagnostic tool. Read the codes displayed.
   1. If code 13, (111/5) displays, replace the ACLS/AECL Sensor. Go to test. Refer to "26.3.3.1 Verify Repair" . See Figure "Add Coolant Level Sensor – Maintenance Alert System" .
      

      Figure 1. Add Coolant Level Sensor – Maintenance Alert System

   2. If code 16 (111/6) displays, go to the next procedure. Refer to "26.3.2 Check for Open" .

Section 26.3.2
Check for Open

Perform the following steps to check for open:‪

1. Insert a jumper wire between cavities A and B of the ACLS/AECL Sensor module connector. See Figure "Add Coolant Level Sensor – Maintenance Alert System" .
2. Measure resistance between cavities A and B of the sensor connector.
   1. If measured resistance is greater than 10 Ω, the ground wire of the V-37 wire is open. Repair the open and go to test. Refer to "26.3.3.1 Verify Repair" .
   2. If measured resistance is less than 10 Ω, refer to "26.3.3 Check for Open Signal" .

Section 26.3.3
Check for Open Signal

Perform the following steps to check for open signal: ‪

1. Turn the ignition OFF.
2. Unplug the engine harness 30–pin connector.
3. Insert a jumper wire between cavity V-37 and battery ground.
4. Measure resistance between cavities A and B of the ACLS/AECL Sensor module connector.
   1. If the measured resistance is greater than 10 Ω, the V-37 wire or the battery ground wire is open between the ACLS/AECL Sensor module connector and the engine harness 30–pin connector. Repair the open; replace the wire and go to test. Refer to "26.3.3.1 Verify Repair" .
   2. If the measured resistance is less than 10 Ω, replace the ACLS/AECL Sensor module; go to test. Refer to "26.3.3.1 Verify Repair" .

Section 26.3.3.1
Verify Repair

Perform the following steps to test the repair: ‪

1. Connect all removed connectors.
2. Start and run engine for five minutes.
3. Plug in diagnostic tool.
4. Read active codes.
   1. If no codes display, repairs are complete. Return the unit to service.
   2. If code 16 displays, troubleshooting is complete. Review the above steps to find the error.
   3. If any other codes are logged, refer to "18.3 First Step for Diagnosing a Fault Within the DDEC System" .