ELEMENT 5223015 - Caterpillar

Illustration 1 g01069923
Schematic of the Quickshift Enable Switch
Table 1
Status of the Quickshift Switch    
Quickshift Switch    Terminal 1
(N/C)
Wire G758-PU
J1-29    Terminal 3
(N/O)
G759-WH
J1-31    
OFF     Closed     Open    
ON     Open     Closed    Test Step 1. CHECK THE GROUND CIRCUIT OF THE SWITCH IN THE HARNESS.
Turn the key start switch and the disconnect switch to the OFF position.
Disconnect the machine harness connector(s) from the ECM.
Measure the resistance between contact J1-16 (wire 202-BK) of the machine harness for the ECM and the contact 2 (wire 202-BK).
Also measure the resistance between contact J1-16 (wire 202-BK) of the machine harness for the ECM and the contact 5 (wire 202-BK).Expected Result:Both resistances are less than 5 ohms. Results:
OK - Both resistances are less than 5 ohms. The circuit is correct. Proceed to Test Step 2.
NOT OK - Either resistance is greater than 5000 ohms. The circuit is open. The machine harness has failed.Repair: Repair the machine harness or replace the machine harness. Stop.Test Step 2. CHECK THE SWITCH CIRCUITS FOR A SHORT TO THE +BATTERY CIRCUIT.
The machine harness connector(s) remains disconnected from the ECM.
The disconnect switch and the key start switch remain in the OFF position.
Disconnect contact 3 (wire G759-WH) and contact 1 (wire G758-PU) from the connector of the switch.
At the machine harness connector for the ECM, measure the resistance from contact J1-29 (wire G758-PU) and contact J1-31 (wire G759-WH) of the machine harness to all the contacts that are used in the machine harness connectors for the ECM.Expected Result:Each resistance measurement is greater than 5000 ohms.Results:
OK - Each resistance measurement is greater than 5000 ohms. The harness is correct. Proceed to Test Step 3.
NO - One or more of the measurements were less than 5 ohms. There is a short in the machine harness. Repair: The short is between wire G758-PU and the circuit with the lowest resistance measurement or the short is between wire G759-WH and the circuit with the lowest resistance measurement. Repair the machine harness or replace the machine harness. Stop.Test Step 3. CHECK THE SWITCH CIRCUITS IN THE HARNESS.
The machine harness remains disconnected from the ECM and the switch.
At the harness connector for the switch, connect a jumper wire between contact 3 (wire G759-WH) and contact 1 (wire G758-PU).
At the harness connector for the ECM, measure the resistance from contact J1-31 (wire G759-WH) to contact J1-29 (wire G758-PU).Expected Result:The resistance is less than 5 ohms.Results:
OK - The resistance is less than 5 ohms. Proceed to Test Step 4.
NOT OK - The resistance is greater than 5000 ohms. The circuit is open.Repair: The machine harness has failed. Repair the machine harness or replace the machine harness. Stop.Test Step 4. CHECK THE OPERATION OF THE SWITCH.
Remove the jumper that was installed in the previous Test Step.
The machine harness remains disconnected from the switch.
Connect one lead from a multimeter to contact 2 (wire 202-BK) of the harness connector for the switch.
Connect the other lead from a multimeter to contact 3 (wire G759-WH) of the harness connector for