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MONITOR GP- 2389992 - Caterpillar



2389992 MONITOR GP- Caterpillar parts MONITOR
Rating:
36
Alternative (cross code) number:
CA2389992
238-9992
2389992
Caterpillar 2389992 MONITOR GP-

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Table 1
Diagnostic Codes Table    
Description    Conditions which Generate this Code    System Response    
168-1 System Voltage Low     The battery supply voltage is less than 9 VDC for two seconds.
The engine's ECM has been powered for three seconds.
The engine is not being cranked.     The code is logged if the engine is running.
   
168-2 System Voltage intermittent/erratic     The engine is running. The battery voltage falls below 9 VDC for at least .06 seconds. The voltage returns above 9 VDC.
or
Three voltage readings in the last seven seconds were below 9 VDC.    Use this test when there are active occurrences or logged occurrences of diagnostic codes. Use this test if there are intermittent engine shutdowns or if a difficulty in starting is not accompanied by loss of electrical accessories. Engine shutdowns that are accompanied by a loss of other electrical accessories indicate a problem in the keyswitch. This does not indicate a problem in the wiring at the ECM. Verify that there are no problems with the starting system or with the charging system before you use this test.There are two +Battery connections and two −Battery connections to the ECM. These multiple lines will reduce the resistance at the harness. The ECM continuously receives battery voltage through a 15 amp breaker. When the ECM senses the battery voltage at the keyswitch input, the ECM turns on. When the voltage is removed from the keyswitch input, the ECM turns off.
Illustration 1 g01203933
Typical schematic
Illustration 2 g01203934
P1 ECM connector (P1-52) +Battery (P1-53) +Battery (P1-63) −Battery (P1-65) −Battery (P1-70) KeyswitchTest Step 1. Inspect Electrical Connectors and Wiring
Remove electrical power from the ECM.
Thoroughly inspect the ECM connectors J1/P1. Inspect all of the other connectors. Refer to Troubleshooting, "Inspecting Electrical Connectors" 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, "Inspecting Electrical Connectors" 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 in the connectors and/or wiring.Repair: Repair the connectors or wiring and/or replace the connectors or wiring. Ensure that all of the seals are properly in place and ensure that the connectors are completely coupled.Verify that the repair eliminates the problem.STOPTest Step 2. Check


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