FAN 1G9645 - Caterpillar

If there is an active engine shutdown, the ether injection system is disabled .Activation of the ether starting aid is based from a map using the coolant temperature, intake manifold temperature, and atmospheric pressure. Refer to Illustration 1.
Illustration 1 g02445796The following conditions must be met for the ether injection system to be enabled:
Ether injection is set to "Enabled" in the ECM parameters
Engine coolant temperature is less than the "Start Aid Selection Temperature - Coolant". Refer to Illustration 1.
Intake manifold temperature is less than the "Start Aid Selection Temperature - IMAT."
Coolant temperature and intake manifold air temperature are within 11° C of each other.During the following procedure, refer to the electrical schematic for the application.Complete the procedure in the order in which the steps are listed.
Table 2
Troubleshooting Test Steps Values Results
1. Inspect Electrical Connectors and Wiring
A. Remove the electrical power from the ECM.
B. Thoroughly inspect the ECM connector J1/P1. Inspect all the other connectors for the circuit. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect".
C. Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
D. Check the ECM connector (allen head screw) for the correct torque of 6 N m (53 lb in).
E. Check the harness and the wiring for abrasion and for pinch points.
Loose connection or damaged wire
Result: The harness and wiring are OK.
Proceed to Test Step 2.
Result: There is a fault in a connector or the wiring.
Repair: Repair any faulty connectors or replace the wiring harness. Ensure that all the seals are properly in place and ensure that the connectors are correctly coupled. Proceed to Test Step 7.
2. Check for Active or Logged Diagnostic Codes
The ether canister must be removed prior to performing this procedure.
A. Verify that the keyswitch is in the OFF position.
B. Remove the ether canister.
C. Connect the electronic service tool to the diagnostic connector.
D. Turn the keyswitch to the ON position.
E. Check for active or logged diagnostic codes that relate to the ether injection system.
Diagnostic codes
Result: No diagnostic codes are present.
Repair: There may be an intermittent fault in an electrical component between the ECM and the harness connector for the ether control. The problem may be inside an electrical connector. Refer to Troubleshooting, "Electrical Connector - Inspect".
Result: A 626-5 (2417-5) code is present.
Proceed to Test Step 3.
Result: A 626-6 (2417-6) code is present.
Proceed to Test Step 5.
3. Create a Short at the Solenoid Connector
A. Verify that the keyswitch is in the OFF position.
B. Disconnect the harness connector from the ether solenoid.
C. Fabricate a jumper wire and install the jumper wire between terminal 1 and terminal 2 on the harness connector for the ether solenoid.
D. Turn the keyswitch to the ON position.
E. Access the "Diagnostic Overrides" screen on the electronic service tool and then activate the ether injection system.
Diagnostic code
Result: A 626-5