146 RENR5042-02 Troubleshooting Section i02290014 Ether Injection System - Test The ether starting aid switch is pressed. The intake manifold air temperature is less than 10 °C (50 °F). SMCS Code: 1456-038 System Operation Description: Engine speed is greater than 35 rpm and less than 1200 rpm. Before you test the ether injection system, remove the ether canister from the system. There are no active diagnostic codes for both the engine coolant temperature sensor and the intake manifold air temperature sensor. Use this procedure to troubleshoot any suspect problems with the ether injection system.
A test on the Caterpillar Electronic Technician (ET) allows the technician to activate the ether system. The test is functional when the engine speed is 0 rpm. The test can be activated by selecting the “Override Parameters” screen on Cat ET. This procedure covers the following diagnostic codes: 2417-05 Ether Injection Control Solenoid open/short to +batt 2417-06 Ether Injection Control Solenoid short to ground The ether injection system improves cold weather starting of the engine. The Electronic Control Module (ECM) controls the ether injection system. The ether injection system has two operating modes. The ether injection system can operate in automatic mode and in manual mode.
The ether injection system is disabled if there is an active engine shutdown. In the automatic mode, the ECM energizes the ether relay in cycles of six seconds. First, the ether is turned ON for three seconds. Then, the ether is then turned OFF for three seconds. In the automatic mode, the ether injection system is enabled when all of the following conditions occur: “Ether” is programmed to the ON position in the configuration screen. The intake manifold air temperature is less than 0 °C (32 °F) or the engine coolant temperature is less than 0 °C (32 °F). The engine has not been within 50 rpm of low idle for more than ten seconds.
Engine speed is between 35 rpm and at least 100 rpm below the low idle speed. No diagnostic codes are active for the engine coolant temperature sensor and the intake manifold air temperature sensor. Manual mode is activated by pressing the ether starting aid switch. One 6 cc (0.36 in 3 ) shot of ether is injected when the ether starting aid switch is pressed. In the manual mode, the ether injection system is enabled when all of the following conditions are met: