GASKET 6B2341 - Caterpillar

Illustration 1 g01276888Specification
This test measures the voltage drop across the starting aid switch or the solenoid. The voltage drop is measured across test point (8) and test point (10). Test point (8) is the positive contact and test point (10) is the negative contact.A voltage drop will cause the indicator lamp for the starting aid switch or the solenoid to turn OFF. The voltage drop must be larger than 2.50 0.15 volts. The lamp turned OFF in order to indicate a defect. A defect may be indicated during any Test Step.This test also measures the resistance across the starting aid switch or the solenoid circuit. The resistance is measured across test point (7) and test point (10).A voltage drop will cause the indicator lamp for the starting aid switch/solenoid to turn OFF or ON. The resistance must be less than 300 Ohms in order for the lamp to stay OFF. The resistance must be greater than 3600 Ohms in order for the lamp to turn ON. The lamp turned ON in order to indicate a defect. A defect may be indicated during the following Test Steps:
"Test Setup A, Hookup"
"Test Step B, Crank"
"Test Step D, High Idle"The starting aid switch can cause this defect from the following:
Open switch
Closed switch with an excessive voltage drop
Switch with welded contactsThe starting aid solenoid can cause this defect from the following:
Open solenoid circuitInformation for Other Circuits
The lamp for the starting aid circuit is turned ON and the switch is not activated. The switch has a defect. The contacts for the switch could be welded. The solenoid and/or the harness could be open.Disconnect the analyzer and use a digital multimeter in order to check the continuity of the test points. Check the continuity from test point 10 to test point 7 or the machine ground. The resistance from test point 10 to test point 7 should be greater than 8 Ohms. The switch has probably failed if the resistance is less than 8 Ohms.Welded contacts on the switch can cause the solenoid coil to open. An open in the solenoid coil is a failure.The wiring harness and the connections for the wiring harness are also checked in this test. Refer to the wiring schematic for the machine that is being serviced for the location of the components. An open in the harness will indicate a defect.Note: The engine coolant must be below 38°C (100°F) in order to perform this test. A warm engine must first cool down to a temperature of 27°C (80°F) in order to perform this test.