3516C High Displacement Engine Caterpillar

Ether Starting Aid - Test

Usage:

Before you test the ether injection system, remove the ether canister from the system.

Use this procedure in order to troubleshoot the ether system or use this procedure if a diagnostic code in Table 1 is active or logged.

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Table 1
J1939 Code and Code Descriptions	CDL Code and Code Descriptions	Comments
626-5 Engine Start Enable Device 1 : Current Below Normal	2417-5 Ether Injection Control Solenoid : Current Below Normal	The code is latched. The code is logged. Ether injection is disabled.
626-6 Engine Start Enable Device 1 : Current Above Normal	2417-6 Ether Injection Control Solenoid : Current Above Normal	The code is latched. The code is logged. Ether injection is disabled.

The ether injection system will improve cold weather starting of the engine. The engine Electronic Control Module (ECM) controls the ether injection system. The ether injection system is disabled if there is an active engine shutdown.

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.

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Illustration 1	g02445796

The following conditions must be met for the ether injection system to be enabled:

Ether injection is set to enabled in Cat^® Electronic Technician (ET)
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.

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Illustration 2	g01696575
Ether starting aid group (typical example) (1) Ether injection solenoid

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Illustration 3	g01155187
Terminal locations at the harness connector for the ether solenoid (1) Ether enable solenoid (2) Return for ether injection solenoid

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Illustration 4	g03748206
Not all connectors are shown, refer to the appropriate schematic

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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 connectors J1/P1 and J2/P2. Inspect all of 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 proper torque. Refer to the diagnostic functional test Troubleshooting, "Electrical Connectors - Inspect". E. Check the harness and the wiring for abrasion and for pinch points.	Connectors and Wiring	Result : The harness and wiring are OK. Proceed to Test Step 2. Result : There is a problem in the connectors and/or wiring. Repair : Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are coupled. Proceed to Test Step 4.
2. Check the Wiring Between the ECM and the Ether Control 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. Disconnect the engine harness connector for the ether control. D. Connect a digital voltmeter across the two terminals on the engine harness connector for ether control. E. Turn the keyswitch to the ON position. F. Measure the voltage across the terminals while the keyswitch is turned ON.	10 VDC	Result : The voltage measured 0 VDC. Repair : There is a problem in an electrical component between the ECM and the harness connector for the ether control. The problem may be inside an electrical connector. Make the necessary repairs. Proceed to Test Step 3. Result : The voltage measured greater than 10 VDC. Repair : The electrical components between the ECM and the harness connector for the ether control are OK. Proceed to Test Step 3.
3. Measure the Resistance of the Coil Inside the Ether Control A. Verify that the ether control is not connected to the engine harness. B. Measure the resistance of the coil inside the ether control.	20 Ω	Result : The measured resistance was approximately 20 Ω. Proceed to Test Step 4. Result : The measured resistance was not approximately 20 Ω. Repair : Replace the ether control. Proceed to Test Step 4.

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Illustration 5	g02462341
Retracted plunger

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Illustration 6	g02462343
Extended plunger

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Table 3
Troubleshooting Test Steps	Values	Results
4. Verify the Repair A. Activate the Ether Injection Override. B. Verify that the plunger moved up when the override was active.	Plunger Movement	Result : The plunger moved up when the override was active. Repair : Install the ether bottle and return the unit to service.