PIN 9W7007 - Caterpillar

System Operation Description:Use this procedure to troubleshoot any suspect problems with the ether injection system.The ether injection system is used to improve the cold weather starting capability of the engine. The Electronic Control Module (ECM) controls the ether injection system. The ether injection system can operate in a automatic mode or a manual mode.In the automatic mode, the ECM energizes the ether relay in cycles of three seconds. The ether is turned on for three seconds. The ether is then turned off for three seconds.In the automatic mode, the ether injection system is enabled when the following conditions occur:
Engine coolant temperature is between −40 °C (−40 °F) and 10 °C (50 °F).
Engine speed is between 30 rpm and 1500 rpm.Manual mode is activated by pressing the starting aid switch. In the manual mode, a single shot of ether is injected when the ether switch is actuated. The quantity of ether that is injected is controlled by the ECM. In the manual mode, the ether injection system is enabled when the following conditions are satisfied:In the manual mode, the ether is turned on for three seconds.
The starting aid switch is placed in the MANUAL position.
Engine speed is between 30 rpm and 1500 rpm.
Engine coolant temperature is less than 66 °C (151 °F).
Illustration 1 g01433515
Schematic for the ether system
Breathing ether vapors or repeated contact of ether with skin can cause personal injury. Personal injury may occur from failure to adhere to the following procedures.Use ether only in well ventilated areas.Do not smoke while changing ether cylinders.Use ether with care to avoid fires.Do not store replacement ether cylinders in living areas or in the operator's compartment.Do not store ether cylinders in direct sunlight or at temperatures above 49 °C (120 °F).Discard cylinders in a safe place. Do not puncture or burn cylinders.Keep ether cylinders out of the reach of unauthorized personnel.To avoid possible injury, be sure the brakes are applied and all controls are in Hold or Neutral when starting the engine.
Test Step 1. Check the Ether Canisters for Fluid
Remove electrical power from the ECM.
Remove the ether canister from the ether solenoid. Determine if the canister contains any ether.Expected Result:The ether canister is not empty.Results:
OK - The ether canister is not empty. Remove the ether canister from the ether solenoid for the remainder of this test. Proceed to Test Step 2.
Not OK - The ether canister is empty.Repair: Replace the empty ether canister with a full ether canister. Retry the system.STOPTest Step 2. Inspect Electrical Connectors and Wiring
Remove electrical power from the ECM.
Illustration 2 g01139425
ECM (1) J1/P1 connectors (2) J2/P2 connectors
Thoroughly inspect connectors (1) and (2). Thoroughly inspect the circuit that is associated with the starting aid.