TUBE AS 8G1353 - Caterpillar

Table 6
Resistance Measurements for a Multiple Engine Configuration With a Dedicated Master Throttle
Position of the Engine Synchronization Switch Terminals Expected Result
Disabled P1-35 P1-63 Open circuit
P1-44 P1-63 Open circuit
Enabled P1-35 P1-63 Open circuit
P1-44 P1-63 Less than ten Ohms
Table 7
Troubleshooting Test Step Values Results
4. Check the Engine Synchronization Inputs
A. Turn the keyswitch to the OFF position.
B. Disconnect the J1/P1 ECM connectors.
C. Perform the resistance measurements that apply to your application configuration:
a. If your application has a single engine, measure the resistance between the points that are listed in Table 3. Be sure to wiggle the wires between the switch that enables the secondary throttle and the ECM as you make each measurement.
b. If your application has two engines, measure the resistance between the points that are listed in Table 4. Only perform the measurements on the engine that will not become synchronized. Be sure to wiggle the wires between the Synchronization Switch and the ECM as you make each measurement.
c. If your application has two engines and one throttle that is designated as the master throttle, measure the resistance between the points that are listed in Table 5. Only perform the measurements that apply to the configuration of your application throttle controls. Be sure to wiggle the wires between the synchronization switch and the ECM as you make each measurement.
d. If your application has two engines and a dedicated master throttle, measure the resistance between the points that are listed in Table 6. Only perform the measurements that apply to the configuration of your application throttle controls. Be sure to wiggle the wires between the engine synchronization switch and the ECM as you make each measurement.
The resistance measurements are correct.
Result:
The resistance measurements are correct.
Perform the following procedure:
1.Connect the J1/P1 connectors.
2. Attempt to synchronize the engines.
3. If the engines will not synchronize, there may be a problem with the ECM.
It is unlikely that the ECM has failed. Exit this procedure and perform this entire procedure again. If the engines will not synchronize, replace the ECM. Refer to Troubleshooting, "ECM - Replace".
Verify that the problem is resolved.
At least one resistance measurement is incorrect. There is a problem with the circuit for engine synchronization. There may be a problem with an electrical connector.
Carefully inspect the wiring between the ECM and the Synchronization Switch. Refer to Troubleshooting, "Electrical Connectors - Inspect". Repair the wiring, when possible. Replace parts, if necessary. Verify that the problem is resolved. Complete the procedure in the order in which the steps are listed.The procedure corrected the issue. - STOP.Result: The procedure did not correct the issue.Result: Contact your Cat dealer Technical Communicator (TC). For further assistance, your TC can confer with the Dealer Solutions Network (DSN).