150 RENR5042-02 Troubleshooting Section C. At the harness connector for the ether injection solenoid, connect a voltmeter between terminal 1 and engine ground. E. Select the “Diagnostic Tests” on Cat ET. F. Select the “Override Parameters” screen on Cat ET. D. Turn the keyswitch to the ON position. E. Select the “Diagnostic Tests” on Cat ET. G. Activate the ether override. The ECM will activate the override for ten seconds. Observe the voltmeter while the ether injection system is activated. F. Select the “Override Parameters” screen on Cat ET. H. Deactivate the ether override. G. Activate the ether override. The ECM will activate the override for ten seconds.
Observe the voltmeter while the ether injection system is activated. I. Turn the keyswitch to the OFF position. J. Connect the wire to terminal 86 of the ether start relay. H. Deactivate the ether override. Expected Result: I. Turn the keyswitch to the OFF position. The voltage measures 24 ± 3 VDC. J. Connect all of the connectors. Expected Result: Results: The voltage at the ether injection solenoid is 24 ± 3 VDC. OK The voltage was 24 ± 3 VDC. Proceed to Test Step 7. Not OK The voltage was not 24 ± 3 VDC. Proceed to Test Step 9. Results: OK – The voltage at the ether injection solenoid is 24 ± 3 VDC. Test Step 7.
Check the Voltage to the Normally Open Contacts of the Ether Relay from the Keyswitch Repair: Verify that the wire from the ether injection solenoid to the −Battery has continuity. If the wire is OK, replace the ether ether valve. A. Turn the keyswitch to the ON position. B. Measure the voltage between terminal 30 of the ether relay and ground. STOP. Not OK The voltage at the ether injection solenoid is not 24 ± 3 VDC. C. Turn the keyswitch to the OFF position. Expected Result: Repair: Inspect the wiring and connectors between the normally open contacts of the ether relay and the connector at the ether injection solenoid.
Repair the connectors or wiring and/or replace the connectors or wiring. The voltage is 24 ± 3 VDC. Results: OK – The voltage is 24 ± 3 VDC. STOP. Repair: Verify that the wire from terminal 85 of the ether relay has continuity to the −Battery. If the wire is OK, replace the ether relay. Verify that the original problem is resolved. Test Step 6. Check the Voltage at the Coil of the Ether Relay A. Turn the keyswitch to the OFF position. If the wire from terminal 85 of the ether start relay does not have continuity to the −Battery, repair the wire. Replace the wire, if necessary. Verify that the original problem is resolved. B. Disconnect the wire from terminal 86 of the ether relay. C.
Connect a voltmeter between the end of the wire and engine ground. STOP. D. Turn the keyswitch to the ON position.