BOLT-TRACK MASTER 6T8520 - Caterpillar

System Operation Description:Use this procedure to troubleshoot the electrical system if a problem is suspected with the power to the engine's Electronic Control Module (ECM) or if any one of the diagnostic codes in Table 1 is active or easily repeated. Refer to Troubleshooting, "Event Codes" for information about event codes and the default trip points for these codes. You must access the monitoring system on Caterpillar Electronic Technician (ET) in order to view the current trip points for these codes.
Table 1
Diagnostic Codes Table    
Code    Conditions which Generate this Code    System Response    
E043(1) Low System Voltage Warning     The battery voltage to the ECM is less than normal.     The code is logged.    
168-0 Electrical System Voltage : High     The battery supply voltage is greater than 32 VDC for two seconds.
The engine's ECM has been powered for three seconds.
The engine is not being cranked.    
168-1 Electrical System Voltage : Low     The battery supply voltage is less than nine VDC for two seconds.
The engine's ECM has been powered for three seconds.
The engine is not being cranked.    
168-2 Electrical System Voltage : Erratic, Intermittent, or Incorrect     The engine is running. The battery voltage falls below nine VDC for at least .06 seconds. The voltage returns above nine VDC.
or
Three voltage readings in the last seven seconds were below nine VDC.    To reduce resistance in the wiring harness, there are three isolated power connections to the ECM. The connections must be complete in order to ensure proper engine operation. There is a constant power supply to the ECM when the engine is shutdown. In order to shut off the power to the ECM, the main power needs to be disconnected. The engine will begin the starting sequence when the following conditions exist:
The ECM detects battery voltage at the keyswitch on P1-70.
The Engine Control Switch (ECS) is activated.
Illustration 1 g01382553
Typical schematic
Illustration 2 g01382168
P1 ECM connector (P1-52) +Battery (P1-53) +Battery (P1-55) +Battery (P1-63) −Battery (P1-65) −Battery (P1-67) −Battery (P1-70) Keyswitch
Illustration 3 g01382170
Customer connector (Terminal 48) +Battery (Terminal 52) +Battery (Terminal 53) +Battery (Terminal 61) −Battery (Terminal 63) −Battery (Terminal 65) −Battery (Terminal 70) Keyswitch
Illustration 4 g01234146
Location of ECM connectorsTest Step 1. Inspect Electrical Connectors and Wiring
Turn the main disconnect switch to the OFF position.
Thoroughly inspect the ECM connectors J1/P1. Inspect all of the connections on the customer connector. Refer to Troubleshooting, "Electrical Connectors - Inspect" for the proper procedure for inspecting system wiring.
Perform a 45 N (10 lb) pull test on each of the wires in the ECM connector that are associated with the circuit.
Check the ECM connector (allen head screw) for the proper torque. Refer to Troubleshooting, "Electrical Connectors - Inspect" for details.
Check the harness and the wiring for abrasion and for pinch points.Expected Result:All connectors, pins, and sockets are completely coupled and/or inserted. The harness and wiring are free of corrosion, of abrasion, and of pinch points.Results:
OK - The harness and wiring are OK. Proceed to Test Step 2.
Not OK - There is a problem