HYDRAULIC TORQUE CONVERTER GROUP 1T0690 - Caterpillar

open contacts of the "ASOS". If voltage is not present on wire K708, check the wiring and the circuit breaker for the air shutoff for problems.Check wire 220 on the coil of the "ASOS" for continuity to the −Battery. If necessary, repair the wire or replace the wire.If wire 220 is OK and voltage is present on wire K708, replace the "ASOS".STOPTest Step 7. Check the Voltage at the Connector for the Air Shutoff Solenoids
Turn the ECS to the OFF/RESET position.
Disconnect the connector for the air shutoff solenoids. Disconnect the connector for the right and left sides of the engine.
Connect a voltmeter between wire G708 on the connector for the air shutoff solenoid and the engine ground.
Turn the ECS to the STOP position. The engine should be off.
Activate the customer's emergency stop switch.
Monitor the voltage on the voltmeter.
Deactivate the customer's emergency stop switch.
Reconnect the connectors for the air shutoff solenoids. Expected Result:The voltage measures 24 3 VDC for approximately 2.5 seconds.Results:
OK - The voltage measures 24 3 VDC for approximately 2.5 seconds. The circuit is operating correctly to this point.Repair: Check the wire H708 from terminal A of the connector for the air shutoff solenoid for continuity to the −Battery terminal. If the wire H708 to the −Battery terminal is OK, replace the air shutoff solenoid.STOP
Not OK - The voltage did not measure 24 3 VDC for approximately 2.5 seconds. System voltage was not available at the solenoid connector.Repair: Repair the wire G708 between the connector for the air shutoff solenoids and terminal I at connector P-C1 of the rigid harness.STOPTest Step 8. Check the Voltage at the Contact of Relay "R3A"
Turn the ECS to the OFF/RESET position.
Disconnect wire T120 from