C7.1 Engines Caterpillar

Ether Starting Aid - Test

Usage:

C7.1 881

Before testing 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
Diagnostic Trouble Codes for Ether Injection
J1939 Code	CDL Code	Code Description (code descriptions may vary)	Comments
626-5	2417-5	Ether Injection Control Solenoid : Current Below Normal	The Electronic Control Module (ECM) detects the following conditions: A low current condition in the output from the ECM to the solenoid for ether injection The ECM has been powered for at least 2 seconds. If equipped, the warning lamp will come on. The ECM will log the diagnostic code.
626-6	2417-6	Ether Injection Control Solenoid : Current Above Normal	The Electronic Control Module (ECM) detects the following conditions: A high current condition in the output from the ECM to the solenoid for ether injection The ECM has been powered for at least 2 seconds. If equipped, the warning lamp will come on. The ECM will log the diagnostic code.

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.

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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 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.

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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 connector J1/P1. 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 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 of 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 or 2417-5 code is present. Proceed to Test Step 3. Result: A 626-6 or 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 or 2417-5 diagnostic code was previously active. A 626-6 or 2417-6 diagnostic code is active with the jumper installed. Repair: Replace the ether solenoid assembly. Proceed to Test Step 7. Result: The 626-5 or 2417-5 diagnostic code remains active. Proceed to Test Step 4.
4. Check the Wiring for an Open Circuit A. Verify that the keyswitch is in the OFF position. B. Disconnect the harness connector from the ether solenoid. C. Disconnect the P1 connector from the ECM. D. Use a multimeter to check the resistance between terminal 1 on the solenoid connector and the ether injection signal terminal on the P1 connector. E. Use a multimeter to check the resistance between terminal 2 on the solenoid connector and the ether injection return terminal on the P1 connector.	Less than two Ohms	Result: The resistance measurements are both less than two Ohms. Proceed to Test Step 7 Result: At least one of the resistance measurements is greater than two Ohms. Repair: Replace the wiring between the ether solenoid and the P1 connector.
5. Create an Open Circuit at the Solenoid Connector A. Verify that the keyswitch is in the OFF position. B. Disconnect the harness connector from the ether solenoid. C. Turn the keyswitch to the ON position. D. Use the electronic service to check for active diagnostic codes. Wait at least 10 seconds for activation of the diagnostic codes. E. Turn the keyswitch to the OFF position.	Diagnostic codes	Result: A 626-6 or 2417-6 diagnostic code was previously active. A 626-5 or 2417-5 diagnostic code is active with the solenoid disconnected. Repair: Install a replacement ether solenoid. Proceed to Test Step 7. Result: The 626-6 or 2417-6 diagnostic code is still active. Proceed to Test Step 6.
6. Check the Wiring for a Short Circuit A. Verify that the keyswitch is in the OFF position. B. Disconnect the connector for the ether solenoid. Disconnect the P1 connector from the ECM. C. Use a suitable multimeter to measure the resistance between the following terminals: · The ether injection signal terminal on the P1 connector and all other terminals on the P1 connector. · The ether injection return terminal on the P1 connector and all other terminals on the P1 connector.	Greater than 100 Ohms	Result: All resistance measurements are greater than 100 Ohms. Proceed to Test Step 7. Result: At least one of the resistance measurements is less than 100 Ohms. Repair: Replace the wiring between the ether solenoid and the P1 connector. Proceed to Test Step 7.

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Illustration 2	g03152796

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Table 3
Troubleshooting Test Steps	Values	Results
7. 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. Install the ether bottle and return the unit to service. Result: The plunger did not move when the override was active. Contact the Dealer Solutions Network (DSN).