TM 9-6115-730-24
0013
ELECTRONIC TECHNICIAN (ET) TROUBLESHOOTING - Continued
SYMPTOM
4.
Ether Injection System Test.
System Operation Description:
Use this procedure to troubleshoot any suspect problems with the Ether System.
This procedure covers the following diagnostic codes:
545-E-05 Ether Start Relay open/short to +batt
545-E-06 Ether Start Relay short to ground
The ether injection system (Figure 4) will improve cold weather starting of the engine. The engine's Electronic
Control Module (ECM) controls the ether injection system. The ether injection system is disabled if there is an
active engine shutdown. The ECM energizes the ether relay for a predetermined amount of time that is based on
the coolant temperature and the inlet manifold air temperature.
The ether injection system is enabled when all of the following conditions occur:
Ether is enabled in the system configuration parameters.
Engine speed is less than 35 rpm.
Coolant temperature or Inlet Manifold air temperature is less than 0C (32F).
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.
Figure 4. Ether Injection System Circuit.
