C7.1 Engines Caterpillar

Operator Level Inducement

Inducements are engine derates or other actions intended to prompt the operator to repair or maintain the emission control system.

Inducement strategies are control actions required by EPA/ARB Tier 4 and EU Stage IV regulations. An inducement strategy ensures prompt correction of various failures in the engine NOx emission control system. The strategy requires actions to limit engine performance and defines required the following indications while the control actions are imposed:

• Lamps

• Messages

• Audible alarms

Associated Codes

Troubleshoot any associated diagnostic codes listed in Table 2 that are present. Refer to "Inducement Type" in Table 2 for the correct Inducement table.

Service Override Mode

Service Override mode allows a technician to service inducement-related faults on an engine while having full engine operation and no derate effects. This mode is initiated through the electronic service tool. Service Override Mode can be entered as many times as necessary and does not have a time limit. Any active faults still appear in the electronic service tool when an engine is in Service Override Mode.

Service Override mode pauses all inducement-related timers that have been activated by triggering faults. This pause prevents the system from escalating to a higher inducement level.

DEF Tank Level Inducement

DEF Tank Level Fault Occurrence

Two options are available but only one option will be enabled.

Option 1 - Reduced Performance (Derates)

Option 1 is the default setting for inducement.

If the DEF level falls below 20%, an amber indicator will illuminate below the DEF level gauge on the panel. To avoid further inducements, add DEF to the DEF tank.

Level 1: If the DEF level falls below 13.5%, the Emissions System Malfunction lamp will illuminate. The amber indicator next to the DEF level gauge on the panel will continue to remain lit.

Level 2 (Mild): If the DEF level is below 7.5%, the Emissions System Malfunction lamp will flash slowly. The amber indicator below the DEF level gauge on the panel will remain lit.

Level 2 (Severe): If the DEF level falls below 1% without a loss of DEF pressure, the engine is derated by 25% torque over a 10 minute period.

Level 3: When the DEF level falls below 3% with a loss of DEF pressure, the engine enters a 5 minute cool down period. The engine is derated by 100% torque. The reduced performance is followed by engine at low idle only or engine shutdown. The following indications will be present:

• The Emissions System Malfunction lamp will flash quickly

• The Shutdown lamp will be on

• The engine will be restricted to low idle or will be shut down

• The amber indicator below the DEF level gauge on the panel will be lit.

Illustration 1	g03813913

Option 2 - Reduced Time (No Derates)

Option 2 is an alternative setting for applications with auxiliary equipment that could be damaged if the engine is derated.

If the DEF level falls below 20%, an amber indicator will illuminate below the DEF level gauge on the panel. To avoid further inducements, add DEF to the DEF tank.

Level 1: If the DEF level falls below 13.5%, the Emissions System Malfunction lamp will illuminate. The amber indicator next to the DEF level gauge on the panel will continue to remain lit.

Level 2: If the DEF level is below 7.5%, the Emissions System Malfunction lamp will flash slowly. The amber indicator below the DEF level gauge on the panel will remain lit.

Level 3: If the DEF level is below 3%, the engine enters a 5 minute cool down period. The engine is derated by 100% torque. The following indications will be present:

• The Emissions System Malfunction lamp will flash quickly

• The Shutdown lamp will be on

• The amber indicator below the DEF level gauge on the panel will be lit.

Illustration 2	g03813924

Tampering/Dosing Interruption

The Emissions System Malfunction lamp will illuminate for a fault resulting from SCR system tampering or an SCR system fault. If the fault is the result of system tampering, a first occurrence will result in a level 1 inducement for a duration of 2.5 hours. Repeat occurrences will result in a level 1 inducement duration of 5 minutes.

If a fault condition exists for the entire duration of inducement level 1, the strategy advances to inducement level 2. For a fault resulting from SCR system tampering or an SCR system fault, the Emissions System Malfunction lamp will flash.

The duration for a level 2 inducement is always 70 minutes for the first occurrence. Repeat occurrences will result in a level 2 inducement duration of 5 minutes.

If a fault condition exists for the entire duration of inducement level 2, the strategy advances to inducement level 3. The Emissions System Malfunction lamp will flash and the Shutdown lamp will be on. The engine will be restricted to low idle or will be shut down. After the final inducement, the keyswitch can be cycled once which will allow 20 minutes of engine run time with full torque. After 20 minutes, the engine will allow idle only or will be shut down until the fault has been resolved. The override can only be used once.

The system must be fault-free for 40 hours before the system resets to zero. If the fault is intermittent and returns within 40 hours, the repeat inducement timings will be triggered.

Timeline For First Fault Occurrence

Illustration 3	g03780334

Timeline For Second Fault Occurrence

Illustration 4	g03780336

NRS Inducement

The Emissions System Malfunction lamp will illuminate for a fault resulting from an impeded NOx Reduction System (NRS). A first occurrence will result in a level 1 inducement for a duration of 35 hours. Repeat occurrences will result in a level 1 inducement duration of 48 minutes.

If a fault condition exists for the entire duration of inducement level 1, the strategy advances to inducement level 2. The Emissions System Malfunction lamp will flash for a fault resulting from an impeded NRS. The duration for a level 2 inducement is always 60 minutes for the first occurrence. Repeat occurrences will result in a level 2 inducement duration of 60 minutes.

If a fault condition exists for the entire duration of inducement level 2, the strategy advances to inducement level 3. The Emissions System Malfunction lamp will flash and the Shutdown lamp will be on. The engine will be restricted to low idle or will be shut down. After the final inducement, the keyswitch can be cycled once which will allow 20 minutes of engine run time with full torque. After 20 minutes, the engine will allow idle only or will be shut down until the fault has been resolved. The override can only be used once.

The system must be fault-free for 40 hours before the system resets to zero. If the fault is intermittent and returns within 40 hours, the repeat inducement timings will be triggered.

Timeline For First Fault Occurrence

Illustration 5	g03780340

Timeline For Second Fault Occurrence

Illustration 6	g03780342