SEAL-LIP TYPE 9M3879 - Caterpillar

System Operation Description:When the engine is in AUTO mode, the engine uses an Ether System to improve starting in cold temperatures. The duration of the ether cycle is based on the engine coolant temperature. The Electronic Control Module (ECM), which controls the ether system, uses the engine coolant temperature sensor to detect engine temperature. The ECM determines if ether should be injected by monitoring actual engine rpm and the engine temperature. The ECM will activate the ether solenoid if the engine coolant temperature is below a set temperature and the engine rpm is below a certain level. The ether system becomes enabled at 10 °C (50 °F). The ether system will run for a minimum of 10 seconds up to a maximum of 130 seconds at -40 °C (-40 °F). The automatic ether injection system is disabled whenever engine rpm exceeds 1900 rpm or the engine coolant temperature exceeds 10 °C (50 °F).The ether injection system can also be operated in manual mode. The ether system is switched into manual mode whenever the starting aid switch is depressed. Manual mode also allows ether to be injected whenever the coolant temperature is less than 10 °C (50 °F) and engine rpm is greater than 50 rpm. Ether is injected in manual mode if the starting aid switch is depressed and the coolant temperature is below the maximum limit. The manual mode will allow ether to be injected for a maximum of 130 seconds when the switch is toggled.The ether solenoid is specially designed to actuate under low voltage situations. If you operate the ether solenoid at 24 VDC for more than three seconds, damage may occur. Current to the solenoid will be reduced by adding a 20 Ohm resistor in series with the ether solenoid.Note: The ether function will be disabled if the ether control parameter is disabled.
Illustration 1 g00856742
Typical example
Personal injury or death can result from using ether.Failure to follow these instructions could result in an explosion and/or fire and possible personal injury.When using starting fluid, follow the manufacturer's instructions carefully. Use ether sparingly and spray it only while cranking the engine. Also, do not store starting fluid containers in the cab.
The ether canister must be removed prior to activating this test.
Do not perform this procedure within 15 M (50 ft) of an open flame.
Test Step 1. Check for Connector Damage.
Turn the circuit breaker CB-8 to the OFF position.
Thoroughly inspect the ECM connector J1/P1. Inspect all of the other connectors. Refer to the diagnostic functional test Troubleshooting, "Inspecting Electrical Connectors" for details.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque of 6.0 N m (55 lb in).
Check the customer connector (allen head screw) for the proper torque of 2.25 0.25 N m (20 2 lb in).
Check the harness and the wiring for abrasion and pinch points.Expected Result:The connectors and wiring should be free